Slow Response from petal? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Luvs2slide · 12-26-2010, 07:25 PM

Theres about a 1.5 sec delay from the time I press the acceleration pedal, to when my rpm needle actually moves.

Is this due to a old throttle cable? I already tried adjusting it so that the cable is tight on the throttle body.

ANyone have any input?

chiboy002 · 12-26-2010, 07:42 PM

old sensor?

anton1o · 12-26-2010, 10:24 PM

Well is there a 1.5s delay to when the engine actually revs tho?

Imagine you dont have an RPM gauge at all, if you press the pedal does it instantly rev or it has a 1.5sec delay aswell, this would determine where the fault may actually really be.

Luvs2slide · 12-27-2010, 02:43 AM

Old sensor? What do you mean?

Yes. anton1o. Yes, there's a 1.5 sec delay when it actually revs. Forgot to mention that.

Any ideas?

Weedm · 12-27-2010, 03:23 AM

is your car an auto?

s14slideshow · 12-27-2010, 12:23 PM

probably badly timed and hesitates before revving.

Luvs2slide · 12-27-2010, 12:25 PM

Car is a manual. Timing is perfect. Please dont comment if you're just guessing. Only hesistates on start up and not after warmup.

nismoman · 12-27-2010, 12:40 PM

if you can replicate this by going out to the engine a opening the throttle manually then you know its not the cable. if it doesnt then yeah its the cable. did you chech the slack inside at the pedal?

240sx123$ · 12-27-2010, 12:50 PM

Quote:

Originally Posted by Luvs2slide

Only hesistates on start up and not after warmup.

Coolant temperature sensor is bad. Replace it and report back. They cost like a dollar.

chiboy002 · 12-27-2010, 01:39 PM

Quote:

Originally Posted by Luvs2slide

Old sensor? What do you mean?

Yes. anton1o. Yes, there's a 1.5 sec delay when it actually revs. Forgot to mention that.

Any ideas?

nevermind, i thought you meant the tachometer had a delay and not the motor itself... my bad

Quote:

Originally Posted by Luvs2slide

Only hesistates on start up and not after warmup.

why would you want to rev your car before its warmed up? That's causing damage

RedSiBaron · 12-28-2010, 12:12 AM

Quote:

Originally Posted by 240sx123$

Coolant temperature sensor is bad. Replace it and report back. They cost like a dollar.

Good info, ill have to remember this

cotbu · 12-28-2010, 08:55 AM

Are we not from the same planet? Logically the answer would be TPS!
yes the answer is not always the logical or obvious but just guessing and shit is stupid.

I would test in this order: Check ecu for codes, Check and adjust tps voltage(open and closed). Then verify and adjust timing.

If by then, the correct results were not produced, I would start looking at other possible problem areas.

Also does it kind of break up before the rev? like there's carb cleaner, etc in there. Anyway my educated guess is TPS.

240sx123$ · 12-28-2010, 10:30 AM

Im telling you, its the coolant temperature sensor. The CTS reads how warm the engine is- the ECU makes significant adjustments to the air fuel ratio when the engine is warming up. Warm up fuel maps are very different from fuel maps for operating temperature, and the only way the ECU can tell the difference is with that sensor. The CTS tells the ECU when the engine is warm. If the problem is occurring only when the car is warm, chances are because the CTS is not working properly, making the car run as if its warmed up when it is still cold. If the ECU is thinking that the car is warm when it is actually cold, it wont be giving the proper amounts of fuel and air, and will cause the car to run shitty. This can also happen the other way around- with the car running well when its cold, but running poorly when its warm. In either case, the culprit is usually the coolant temp sensor.

Throttle Position Sensor wouldnt explain why it does it when the engine is cold, but not once warmed up. That is the exact symptom of a bad CTS.

cotbu · 12-28-2010, 10:46 AM

In correct it wouldn't matter if it was hot or cold for the tps to be the culprit.
Coolant temp sensor, has multiple errors that are visual and audible, he is not acknowledging any of them. So using deductive reasoning, its logical to say it's the tps. If the ecu has learned the value maybe not so much when warmed up.

some of the cts problems would be, rich idle, rpm fluxing, and hard to start warm or cold, and maybe a code or two.

The symptoms are not exact in anyway, we could have asked a multitude of questions to narrow down the solution, but this is zilvia! you tell us the problems we don't tell you...! OK sometimes, but whatever!

Not saying its not cts, just i wouldn't start there 1st in this situation.

240sx123$ · 12-28-2010, 10:53 AM

I smell a gentlemen's bet... Care to make a wager on it?

Loser has to rock a "[Winners name here] is all knowing" signature for one month?

Hahaha

RedSiBaron · 12-28-2010, 12:15 PM

Quote:

Originally Posted by 240sx123$

I smell a gentlemen's bet... Care to make a wager on it?

Loser has to rock a "[Winners name here] is all knowing" signature for one month?

Hahaha

Haha this is awesome...you watch you'll both end up being wrong and hell find a hamster living in his TB or some crazy shit that makes no sense

NissanSean · 12-28-2010, 12:22 PM

Quote:

Originally Posted by RedSiBaron

Haha this is awesome...you watch you'll both end up being wrong and hell find a hamster living in his TB or some crazy shit that makes no sense

hahaha i bet its dog food in the air filter box again. it always happends

rb25_s13*CHUKI · 12-28-2010, 12:29 PM

Quote:

Originally Posted by Luvs2slide

Old sensor? What do you mean?

Yes. anton1o. Yes, there's a 1.5 sec delay when it actually revs. Forgot to mention that.

Any ideas?

Quote:

Originally Posted by Luvs2slide

Car is a manual. Timing is perfect. Please dont comment if you're just guessing. Only hesistates on start up and not after warmup.

You ask whats wrong and people give u Ideas of what It could be, fuckin douche bag. Your the dumbass who cant get his car running right and then say dont comment If your guessing.

RedSiBaron · 12-28-2010, 12:38 PM

Quote:

Originally Posted by NissanSean

hahaha i bet its dog food in the air filter box again. it always happends

Hahaha please tell me this is something that happened here on zilvia...

rc1honda · 12-28-2010, 01:50 PM

Yeah it's the TPS. Not to mention we dont even know what motor we are talking about here. But i almost postive it's the TPS. The CTS really doesn't effect throttle response. It effects idle and and crusing but not throttle response. When you give the car gas it should rev.

TPS, check voltage shit take like 5 minutes. If it's less or more then .35-.45 volts at closed throttle then thats your problem. BTW this is not a guess, had the same problem with my SR. @240-123 the OP never said anything about warm or cold. And even still it would happen regardless of temp if the TPS is outta wack.

jspaeth · 12-28-2010, 11:34 PM

All of you are a bunch of clowns and are not necessarily right.

I have this problem, and it is NOT the TPS or the CTS.

I have done many different tests to be able to verify that it is neither.

I think it is something to do with the injectors or IACV needing to physically warm up or heat up and get "unstuck" after not having been driven a while....probably the IACV.

rc1honda · 12-28-2010, 11:45 PM

Quote:

Originally Posted by jspaeth

All of you are a bunch of clowns and are not necessarily right.

I have this problem, and it is NOT the TPS or the CTS.

I have done many different tests to be able to verify that it is neither.

I think it is something to do with the injectors or IACV needing to physically warm up or heat up and get "unstuck" after not having been driven a while....probably the IACV.

Wait your still have this problem? Meaning you don"t whats causing it after verifying proper TPS voltage and good CTS?

I mean the TPS is the most likely culprit here. He needs to take 5 minutes and throw a voltmeter on it. If not the we can hunt for the more elusive stuff. I have never seen a IAVC cause this symptom . Not saying it's not the problem but the TPS is a quick and easy check and fix

It would help to know what motor we are even talking about. I mean a big vac leak can cause this symptom.

EDIT now i see the post where he says after it warms up it stops. It could be the CTS or the IAVC i guess. Maybe try cleaning the IAVC sounds like a good idea. Maybe a seafoam treatment would help to.

Luvs2slide · 12-29-2010, 03:26 AM

Quote:

Originally Posted by rb25_s13*CHUKI

You ask whats wrong and people give u Ideas of what It could be, fuckin douche bag. Your the dumbass who cant get his car running right and then say dont comment If your guessing.

.
Haha WOW. Seriously? Who the fuck are you again? GTFO of my thread Git. Anybody can chime in and say "I think its this, or I think it's that" without actually having my same problem. I'm not shooting people down for their comments. It just the guy who said something and I fucking quote "bad timing or hesitates before revving" WTF? C mon now. I'm not some fucking 19/21 yr old kid who doesnt know WTF he's doing.

Quote:

Originally Posted by rc1honda

Wait your still have this problem? Meaning you don"t whats causing it after verifying proper TPS voltage and good CTS?

I mean the TPS is the most likely culprit here. He needs to take 5 minutes and throw a voltmeter on it. If not the we can hunt for the more elusive stuff. I have never seen a IAVC cause this symptom . Not saying it's not the problem but the TPS is a quick and easy check and fix

It would help to know what motor we are even talking about. I mean a big vac leak can cause this symptom.

EDIT now i see the post where he says after it warms up it stops. It could be the CTS or the IAVC i guess. Maybe try cleaning the IAVC sounds like a good idea. Maybe a seafoam treatment would help to.

Motor is a SR20det redtop. 2871R turbine, 850 inj, PFC-D jet, cams, etc. All supporting mods.

One thing I noticed is that I really dont think my throttle body is a "GENUINE" SR20det throttle body as it looks different and never really looked into it.

Also, even when I was stock turbine and ECU my car would not have this problem. Not sure if this may be a problem but TPS is not centered on the adjustment part (bought the car this way.) Never gave me problems before all the upgraded parts went on...My tuner did point out my TPS and how it was like maxed out on the adjustment. I'll try and get some pics to show you what Im talking about.

travisty_ · 12-29-2010, 04:46 AM

After hearing that checking the TPS sounds like a good idea, it takes a couple minutes anyway.

rb25_s13*CHUKI · 12-29-2010, 04:54 AM

[QUOTE=Luvs2slide;3801691].
Haha WOW. Seriously? Who the fuck are you again? GTFO of my thread Git. Anybody can chime in and say "I think its this, or I think it's that" without actually having my same problem. I'm not shooting people down for their comments. It just the guy who said something and I fucking quote "bad timing or hesitates before revving" WTF? C mon now. I'm not some fucking 19/21 yr old kid who doesnt know WTF he's doing.

Hmm this Is funny you knock me for being 21 yet I would have been fixed this issue with my car. I'm 21 years old and I'm sure I can do twice as much as you, Uhh guys my revs slow what ever will I do?!? Check for vacum leaks dumbass, Check you Idle air control valve.

Luvs2slide · 12-29-2010, 05:20 AM

Quote:

Originally Posted by rb25_s13*CHUKI

Hmm this Is funny you knock me for being 21 yet I would have been fixed this issue with my car. I'm 21 years old and I'm sure I can do twice as much as you, Uhh guys my revs slow what ever will I do?!? Check for vacum leaks dumbass, Check you Idle air control valve.

Shh little kid.

I HIGHLY doubt that. This is much deeper than mere vac leaks. My IACV is functional.

If JSpeath (sp) has been having this SAME PROBLEM for nearly two years, its more than that thing you call a brain can think of. I'm not selling anything or buying anything so there isn't a damn thing you can contribute to my thread.

Anyways, back on topic--

240sx123$ · 12-29-2010, 06:37 AM

Rather than arguing about the possibilities, why dont we wait for OP to test his TPS, CTS, and IACV?

Im not opposed to the idea of it being something other than the CTS and I acknowledge the reasoning behind both other diagnosis', but until the OP confirms what the problem was, any arguing is purely speculation.

If the TPS was maxed out in one direction, why not adjust it to the middle and see if that doesnt make a difference? Or check it with a voltmeter? If it were me, Id have "fiddled around" with it (for lack of a better term) just to see if I could get it to do something different.

Start with free things- test IACV, test TPS, then replace CTS.

rb25_s13*CHUKI · 12-29-2010, 06:57 AM

Quote:

Originally Posted by Luvs2slide

Shh little kid.

I HIGHLY doubt that. This is much deeper than mere vac leaks. My IACV is functional.

If JSpeath (sp) has been having this SAME PROBLEM for nearly two years, its more than that thing you call a brain can think of. I'm not selling anything or buying anything so there isn't a damn thing you can contribute to my thread.

Anyways, back on topic--

If my thing I call a brain can't think of anything then what the fuck kind of brain do you have? In the end your the 28 year old who can't figure out why Is car revs slow and try to say im not some 19/21 year old kid who doesn't know shit. Your right your not, Your a 28 year old dumbass who can't figure out why his car revs slow.

Here Is a list of why It would do that Incase your little 28 year old brain can't figure It out/

Maf
Tps
Iacv
Vac leaks
cam timing off
cas timing off
wiring Issue or (grounds)

Instead of saying no Its not any of those everything Is perfect , you should just go fukin check and test. Maybe It could be one Instead of oh no my engine Is perfect but It has rev delays. There for making It not perfect and something Is wrong.

Call me a little kid but this little kid can do a hell of alot more than you can. Uhhh Im jus gonna stand here and scratch my head uhhhh, da engine revs slow duhhhhh. everything Is perfect but for some reason It doesn't rev right. Uhhhh which way did he go. Which way did he go.

Mama always said life Is like a box of chocolates.

Luvs2slide · 12-29-2010, 10:05 AM

Quote:

Originally Posted by rb25_s13*CHUKI

If my thing I call a brain can't think of anything then what the fuck kind of brain do you have? In the end your the 28 year old who can't figure out why Is car revs slow and try to say im not some 19/21 year old kid who doesn't know shit. Your right your not, Your a 28 year old dumbass who can't figure out why his car revs slow.

Here Is a list of why It would do that Incase your little 28 year old brain can't figure It out/

Maf
Tps
Iacv
Vac leaks
cam timing off
cas timing off
wiring Issue or (grounds)

Instead of saying no Its not any of those everything Is perfect , you should just go fukin check and test. Maybe It could be one Instead of oh no my engine Is perfect but It has rev delays. There for making It not perfect and something Is wrong.

Call me a little kid but this little kid can do a hell of alot more than you can. Uhhh Im jus gonna stand here and scratch my head uhhhh, da engine revs slow duhhhhh. everything Is perfect but for some reason It doesn't rev right. Uhhhh which way did he go. Which way did he go.

Mama always said life Is like a box of chocolates.

I Never said my engine was perfect. I'm not wasting anymore of my time with you. Its like talking to a kid. Goes in one ear, out the other.

You are adding non-resourceful bullshit to this thread and I already told you to GTFO before mods close this thread.

rc1honda · 12-29-2010, 12:34 PM

You and me have almost the exact same setup. A good thing is that you have a Power FC which makes checking the TPS voltage easy as pie.

Take the commander and go down the ETC. menu. The go to Sensor Check menu. You can check the TPS voltage without a voltmeter here. While in the car and watching the PFC commander press the gas petal. Closed throttle should be between .35-.45 volts. WOT should be 4.8-5.0 volts or more.

Now while still watching the PFC, press the petal all the way to the floor. The voltage should now be reading 4.8-5.0 or over on the PFC commander. If not then you have to adjust the TPS on the throttle body. Loosen the screws and slightly move it up or down. Then use the PFC commander to monitor the voltage change. I can tell the SR's are very finicky with the tps and throttle rseponse.

Also what kinda HP did you make at what boost? and what kind of dyno if don't mind me asking?

12-26-2010, 07:25 PM	#1
Luvs2slide Zilvia FREAK! Join Date: Oct 2006 Location: NW Florida Age: 43 Posts: 1,490 Trader Rating: (81) Feedback Score: 81 reviews	Slow Response from petal? Theres about a 1.5 sec delay from the time I press the acceleration pedal, to when my rpm needle actually moves. Is this due to a old throttle cable? I already tried adjusting it so that the cable is tight on the throttle body. ANyone have any input? __________________

12-26-2010, 07:42 PM	#2
chiboy002 Post Whore! Join Date: Mar 2010 Location: ◙ Posts: 4,435 Trader Rating: (21) Feedback Score: 21 reviews	old sensor? __________________ street dancer. GLEAM

12-26-2010, 10:24 PM	#3
anton1o Zilvia Junkie Join Date: Jul 2008 Location: Melbourne, Australia Age: 39 Posts: 333 Trader Rating: (0) Feedback Score: 0 reviews	Well is there a 1.5s delay to when the engine actually revs tho? Imagine you dont have an RPM gauge at all, if you press the pedal does it instantly rev or it has a 1.5sec delay aswell, this would determine where the fault may actually really be. __________________

12-27-2010, 02:43 AM	#4
Luvs2slide Zilvia FREAK! Join Date: Oct 2006 Location: NW Florida Age: 43 Posts: 1,490 Trader Rating: (81) Feedback Score: 81 reviews	Old sensor? What do you mean? Yes. anton1o. Yes, there's a 1.5 sec delay when it actually revs. Forgot to mention that. Any ideas? __________________

12-27-2010, 03:23 AM	#5
Weedm Zilvia Addict Join Date: Nov 2008 Location: Seattle / Portland Age: 33 Posts: 902 Trader Rating: (5) Feedback Score: 5 reviews	is your car an auto? __________________

12-27-2010, 12:23 PM	#6
s14slideshow BANNED Join Date: Oct 2010 Location: Iowa Age: 34 Posts: 54 Trader Rating: (1) Feedback Score: 1 reviews	probably badly timed and hesitates before revving.

12-27-2010, 12:25 PM	#7
Luvs2slide Zilvia FREAK! Join Date: Oct 2006 Location: NW Florida Age: 43 Posts: 1,490 Trader Rating: (81) Feedback Score: 81 reviews	Car is a manual. Timing is perfect. Please dont comment if you're just guessing. Only hesistates on start up and not after warmup. __________________

12-27-2010, 12:40 PM	#8
nismoman Zilvia Junkie Join Date: Jul 2005 Location: Bowie, MD Posts: 412 Trader Rating: (0) Feedback Score: 0 reviews	if you can replicate this by going out to the engine a opening the throttle manually then you know its not the cable. if it doesnt then yeah its the cable. did you chech the slack inside at the pedal? __________________

12-28-2010, 08:55 AM	#12
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Are we not from the same planet? Logically the answer would be TPS! yes the answer is not always the logical or obvious but just guessing and shit is stupid. I would test in this order: Check ecu for codes, Check and adjust tps voltage(open and closed). Then verify and adjust timing. If by then, the correct results were not produced, I would start looking at other possible problem areas. Also does it kind of break up before the rev? like there's carb cleaner, etc in there. Anyway my educated guess is TPS. __________________ LoverTechnologies "Half Broken Things!"

12-28-2010, 10:30 AM	#13
240sx123$ BANNED Join Date: Jul 2010 Location: PA Posts: 603 Trader Rating: (2) Feedback Score: 2 reviews	Im telling you, its the coolant temperature sensor. The CTS reads how warm the engine is- the ECU makes significant adjustments to the air fuel ratio when the engine is warming up. Warm up fuel maps are very different from fuel maps for operating temperature, and the only way the ECU can tell the difference is with that sensor. The CTS tells the ECU when the engine is warm. If the problem is occurring only when the car is warm, chances are because the CTS is not working properly, making the car run as if its warmed up when it is still cold. If the ECU is thinking that the car is warm when it is actually cold, it wont be giving the proper amounts of fuel and air, and will cause the car to run shitty. This can also happen the other way around- with the car running well when its cold, but running poorly when its warm. In either case, the culprit is usually the coolant temp sensor. Throttle Position Sensor wouldnt explain why it does it when the engine is cold, but not once warmed up. That is the exact symptom of a bad CTS.

12-28-2010, 10:46 AM	#14
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	In correct it wouldn't matter if it was hot or cold for the tps to be the culprit. Coolant temp sensor, has multiple errors that are visual and audible, he is not acknowledging any of them. So using deductive reasoning, its logical to say it's the tps. If the ecu has learned the value maybe not so much when warmed up. some of the cts problems would be, rich idle, rpm fluxing, and hard to start warm or cold, and maybe a code or two. The symptoms are not exact in anyway, we could have asked a multitude of questions to narrow down the solution, but this is zilvia! you tell us the problems we don't tell you...! OK sometimes, but whatever! Not saying its not cts, just i wouldn't start there 1st in this situation. __________________ LoverTechnologies "Half Broken Things!"

12-28-2010, 10:53 AM	#15
240sx123$ BANNED Join Date: Jul 2010 Location: PA Posts: 603 Trader Rating: (2) Feedback Score: 2 reviews	I smell a gentlemen's bet... Care to make a wager on it? Loser has to rock a "[Winners name here] is all knowing" signature for one month? Hahaha

12-28-2010, 01:50 PM	#20
rc1honda Zilvia Junkie Join Date: Aug 2008 Location: Chicago Age: 43 Posts: 433 Trader Rating: (5) Feedback Score: 5 reviews	Yeah it's the TPS. Not to mention we dont even know what motor we are talking about here. But i almost postive it's the TPS. The CTS really doesn't effect throttle response. It effects idle and and crusing but not throttle response. When you give the car gas it should rev. TPS, check voltage shit take like 5 minutes. If it's less or more then .35-.45 volts at closed throttle then thats your problem. BTW this is not a guess, had the same problem with my SR. @240-123 the OP never said anything about warm or cold. And even still it would happen regardless of temp if the TPS is outta wack.

12-28-2010, 11:34 PM	#21
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	All of you are a bunch of clowns and are not necessarily right. I have this problem, and it is NOT the TPS or the CTS. I have done many different tests to be able to verify that it is neither. I think it is something to do with the injectors or IACV needing to physically warm up or heat up and get "unstuck" after not having been driven a while....probably the IACV. __________________ Daily driven

12-29-2010, 04:46 AM	#24
travisty_ Zilvia Junkie Join Date: May 2010 Location: Phoenix, AZ Age: 32 Posts: 437 Trader Rating: (10) Feedback Score: 10 reviews	After hearing that checking the TPS sounds like a good idea, it takes a couple minutes anyway.

12-29-2010, 04:54 AM	#25
rb25_s13*CHUKI Post Whore! Join Date: Mar 2007 Location: Cali Age: 36 Posts: 2,759 Trader Rating: (16) Feedback Score: 16 reviews	[QUOTE=Luvs2slide;3801691]. Haha WOW. Seriously? Who the fuck are you again? GTFO of my thread Git. Anybody can chime in and say "I think its this, or I think it's that" without actually having my same problem. I'm not shooting people down for their comments. It just the guy who said something and I fucking quote "bad timing or hesitates before revving" WTF? C mon now. I'm not some fucking 19/21 yr old kid who doesnt know WTF he's doing. Hmm this Is funny you knock me for being 21 yet I would have been fixed this issue with my car. I'm 21 years old and I'm sure I can do twice as much as you, Uhh guys my revs slow what ever will I do?!? Check for vacum leaks dumbass, Check you Idle air control valve. __________________ Obliterate

12-29-2010, 06:37 AM	#27
240sx123$ BANNED Join Date: Jul 2010 Location: PA Posts: 603 Trader Rating: (2) Feedback Score: 2 reviews	Rather than arguing about the possibilities, why dont we wait for OP to test his TPS, CTS, and IACV? Im not opposed to the idea of it being something other than the CTS and I acknowledge the reasoning behind both other diagnosis', but until the OP confirms what the problem was, any arguing is purely speculation. If the TPS was maxed out in one direction, why not adjust it to the middle and see if that doesnt make a difference? Or check it with a voltmeter? If it were me, Id have "fiddled around" with it (for lack of a better term) just to see if I could get it to do something different. Start with free things- test IACV, test TPS, then replace CTS.

12-29-2010, 12:34 PM	#30
rc1honda Zilvia Junkie Join Date: Aug 2008 Location: Chicago Age: 43 Posts: 433 Trader Rating: (5) Feedback Score: 5 reviews	You and me have almost the exact same setup. A good thing is that you have a Power FC which makes checking the TPS voltage easy as pie. Take the commander and go down the ETC. menu. The go to Sensor Check menu. You can check the TPS voltage without a voltmeter here. While in the car and watching the PFC commander press the gas petal. Closed throttle should be between .35-.45 volts. WOT should be 4.8-5.0 volts or more. Now while still watching the PFC, press the petal all the way to the floor. The voltage should now be reading 4.8-5.0 or over on the PFC commander. If not then you have to adjust the TPS on the throttle body. Loosen the screws and slightly move it up or down. Then use the PFC commander to monitor the voltage change. I can tell the SR's are very finicky with the tps and throttle rseponse. Also what kinda HP did you make at what boost? and what kind of dyno if don't mind me asking?