Same OLD problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*S13Boosts* · 01-24-2008, 04:29 PM

until Not I still cant figure out whats wrong with my motor...i already tried everything from the old THREADS..okay here we go i really need help with my motor!

the rpm flickers UP AND DOWN when my motor is @ normal temp BUT when its cold my motor drives just fine! i already changed the spark plugs, wires, Maf is still good, Injectors fine, idk what else could it be!!

i need Help real bad i ran out of ideas...

thanks

- s13boosts!

skylindrftr · 01-24-2008, 04:31 PM

put down what you have tried so far in your post so people can better help you

*S13Boosts* · 01-24-2008, 04:35 PM

i replaced my spark plugs, new wires, check them already, Maf is still good, my timing is fine, i ran sea foam Incase my injectors were dirty but nothing was wrong with them in the first place.I also checked all my lines! Also my motor is a SOHC

projectRDM · 01-24-2008, 04:37 PM

Bad CTS. Swap it.

*S13Boosts* · 01-24-2008, 04:38 PM

Quote:

Originally Posted by projectRDM

Bad CTS. Swap it.

thanks!

, something new ! thanks for the input +1 anymore?!

projectRDM · 01-24-2008, 04:42 PM

When the car warms up, it switches to a hot fuel map. With the CTS bad, it never does so, so the car runs rich, dumping fuel, and goes into open loop.

rlpinoy · 01-24-2008, 04:43 PM

maybe bad Idle Control Valve?

*S13Boosts* · 01-24-2008, 04:44 PM

Quote:

Originally Posted by projectRDM

When the car warms up, it switches to a hot fuel map. With the CTS bad, it never does so, so the car runs rich, dumping fuel, and goes into open loop.

All this was started from a major bump on the road, shit was like a mutha, could it go bad cause of that?

*S13Boosts* · 01-24-2008, 04:44 PM

Quote:

Originally Posted by rlpinoy

maybe bad Idle Control Valve?

it couldnt be cause i can smash on this car till it goes to normal temp lol, Plus my idle is just fine

projectRDM · 01-24-2008, 04:49 PM

Quote:

Originally Posted by S13Boosts

All this was started from a major bump on the road, shit was like a mutha, could it go bad cause of that?

There's no way to tell. The CTS is a simple device, but anything can cause it to go bad. Connection could be loose, the plug could be broken, one of the pins could have corroded through and broken off, check it and see. An air pocket could also have been trapped behind it for a while.

*S13Boosts* · 01-24-2008, 04:50 PM

Quote:

Originally Posted by projectRDM

There's no way to tell. The CTS is a simple device, but anything can cause it to go bad. Connection could be loose, the plug could be broken, one of the pins could have corroded through and broken off, check it and see. An air pocket could also have been trapped behind it for a while.

alright thanks, ima go check on it right now!

Rob's S14 · 01-24-2008, 04:57 PM

also, be sure to clean your throttle body. i had some gunk on mine and when the car would warm up it would melt that gunk and the throttle plate would stick while idling.

*S13Boosts* · 01-24-2008, 05:14 PM

Quote:

Originally Posted by Rob's S14

also, be sure to clean your throttle body. i had some gunk on mine and when the car would warm up it would melt that gunk and the throttle plate would stick while idling.

will do+1

kafanylovesme · 01-24-2008, 05:36 PM

I had this same problem on my sohc, but it was throwing the EGR code, I believe it is 32? Just replaced the EGR and some other things and its running fine now. My car would also run fine up until it warmed up and then it would just die at around 2500 rpm's. Is your car throwing any codes bro?

*S13Boosts* · 01-24-2008, 05:47 PM

Quote:

Originally Posted by kafanylovesme

I had this same problem on my sohc, but it was throwing the EGR code, I believe it is 32? Just replaced the EGR and some other things and its running fine now. My car would also run fine up until it warmed up and then it would just die at around 2500 rpm's. Is your car throwing any codes bro?

okay so i just started my hatch, i havnt drove it more than couple weeks due to this problem! i just cleaned my TB right now, everything sounded fine until it was reaching normal temp my rpm NOW its at 1250 way too high.....,no my car isnt throwing any codes someone while back told me a code 34 but how? single cams dont have knock sensors! so pretty much all i gotta do now is check my CTS hope thats it... more input please thanks!

Addicted2Kouki · 01-24-2008, 06:13 PM

You forgot to mention your car would misfire every now and them.

Video record it. IMO your car sounds like shit. so let ppl with more expertise hear whats going on.

*S13Boosts* · 01-24-2008, 07:01 PM

Quote:

Originally Posted by Addicted2Kouki

You forgot to mention your car would misfire every now and them.

Video record it. IMO your car sounds like shit. so let ppl with more expertise hear whats going on.

oh yeah i forgot about that, LOL that flickering is the misfire, yeah ima go make a vid soon as the rain clears!

*ManoNegra* · 01-24-2008, 07:13 PM

I'd also check, if you haven't yet, cap and rotor as well as the intake.

Xandy Boosts · 01-24-2008, 07:27 PM

Quote:

Originally Posted by Addicted2Kouki

You forgot to mention your car would misfire every now and them.

Video record it. IMO your car sounds like shit. so let ppl with more expertise hear whats going on.

maybe it's his shitty exhaust. never heard the misfire from his car yet though.

Turtle · 01-24-2008, 07:39 PM

I too have the same problem I idle at 1900 RPM it sucks, it misfires at idle and off of heavy throttle. Checked timing it lined up good but rpm went up, plugs get fouled easy after like 5 minutes of use. They're not oily or with gas, they're black and dry.

*S13Boosts* · 01-24-2008, 07:42 PM

Quote:

Originally Posted by Turtle

I too have the same problem I idle at 1900 RPM it sucks, it misfires at idle and off of heavy throttle. Checked timing it lined up good but rpm went up, plugs get fouled easy after like 5 minutes of use. They're not oily or with gas, they're black and dry.

@ xandy hahah MY PIPING's BANGIN!!

and for turtle time to read up On this thread ur problem is my problem also, hahah im going to check my CTS tommrow thanks for the input guys!

*S13Boosts* · 01-26-2008, 03:49 PM

NEW UPDATES**** i just changed my CTS! i got it from one of my extra sohc's, now when its cold it flickers..... so im guessing its a bad CTS? i dont want to buy a new one and same thing happens input please thanks!

*S13Boosts* · 01-27-2008, 12:40 PM

so i changed both sensors for the CTS no luck anymore input lol i need help bad i needa sell this car ! thanks guys!

270R · 01-27-2008, 12:54 PM

sounds like your MAF may have crud built up on the actual sensor wire.
take some throttle body cleaner and spray but dont touch the wire on your Maf.

*S13Boosts* · 01-27-2008, 12:56 PM

Quote:

Originally Posted by 270R

sounds like your MAF may have crud built up on the actual sensor wire.
take some throttle body cleaner and spray but dont touch the wire on your Maf.

i cleaned the maf already, dude i tried soo much shit to this car, i ran outta ideas..

cliff notes***
changed spark plugs
new wires
changed CTS,came off old sohc tho?
timing is good,but now its way to high
cleaned maf
sounds like its mis firing?
cleaned TB

*S13Boosts* · 01-27-2008, 01:17 PM

also i will be making a video soon!

270R · 01-27-2008, 01:44 PM

if possible try swapping it with a known good maf. I had a truck with that problem. or could have an intake leak something could of gotten loose when you hit that bump . try misting your intake with something like starter fluid see if your get a reaction from your idle. just be carefull

my two cents good luck...

*S13Boosts* · 01-27-2008, 02:03 PM

Quote:

Originally Posted by 270R

if possible try swapping it with a known good maf. I had a truck with that problem. or could have an intake leak something could of gotten loose when you hit that bump . try misting your intake with something like starter fluid see if your get a reaction from your idle. just be carefull

my two cents good luck...

the maf is good, i dont think anythings leaking but ima try go see, im about to make a video as soon as the damn rains stops!

nousablenames133 · 01-27-2008, 02:24 PM

Bad or dirty IACV. I've had this problem. Cleaning it out with some carb/brake cleaner works as a temporary fix. There was a thread somewhere here on zilvia.com that showed exactly where to spray.

*S13Boosts* · 01-27-2008, 02:29 PM

Quote:

Originally Posted by nousablenames133

Bad or dirty IACV. I've had this problem. Cleaning it out with some carb/brake cleaner works as a temporary fix. There was a thread somewhere here on zilvia.com that showed exactly where to spray.

for some reason i dont think it is,but for the hell of it ima just try it,thanks MORE INPUT PLEASE! +1 for everyone for helping!

01-24-2008, 04:29 PM	#1
S13Boosts Premium Member Join Date: Oct 2006 Location: VEGAS Posts: 5,292 Trader Rating: (12) Feedback Score: 12 reviews	Same OLD problem until Not I still cant figure out whats wrong with my motor...i already tried everything from the old THREADS..okay here we go i really need help with my motor! the rpm flickers UP AND DOWN when my motor is @ normal temp BUT when its cold my motor drives just fine! i already changed the spark plugs, wires, Maf is still good, Injectors fine, idk what else could it be!! i need Help real bad i ran out of ideas... thanks - s13boosts!

01-24-2008, 04:37 PM	#4
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Bad CTS. Swap it. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

01-24-2008, 04:42 PM	#6
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	When the car warms up, it switches to a hot fuel map. With the CTS bad, it never does so, so the car runs rich, dumping fuel, and goes into open loop. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

01-24-2008, 04:43 PM	#7
rlpinoy Zilvia Member Join Date: Sep 2007 Location: SoCal~Long Beach/Carson~ Posts: 284 Trader Rating: (1) Feedback Score: 1 reviews	maybe bad Idle Control Valve? __________________ FS Exhaust, Q45 ignitors, & MORE!

01-24-2008, 04:31 PM	#2
skylindrftr Zilvia FREAK! Join Date: Apr 2007 Location: Metro Detroit Age: 36 Posts: 1,099 Trader Rating: (26) Feedback Score: 26 reviews	put down what you have tried so far in your post so people can better help you

01-24-2008, 04:35 PM	#3
S13Boosts Premium Member Join Date: Oct 2006 Location: VEGAS Posts: 5,292 Trader Rating: (12) Feedback Score: 12 reviews	i replaced my spark plugs, new wires, check them already, Maf is still good, my timing is fine, i ran sea foam Incase my injectors were dirty but nothing was wrong with them in the first place.I also checked all my lines! Also my motor is a SOHC

01-24-2008, 04:57 PM	#12
Rob's S14 Zilvia FREAK! Join Date: Jun 2006 Location: Fountain Valley, CA Age: 43 Posts: 1,199 Trader Rating: (1) Feedback Score: 1 reviews	also, be sure to clean your throttle body. i had some gunk on mine and when the car would warm up it would melt that gunk and the throttle plate would stick while idling.

01-24-2008, 05:36 PM	#14
kafanylovesme Zilvia FREAK! Join Date: Apr 2007 Location: Southern Cali Posts: 1,559 Trader Rating: (10) Feedback Score: 10 reviews	I had this same problem on my sohc, but it was throwing the EGR code, I believe it is 32? Just replaced the EGR and some other things and its running fine now. My car would also run fine up until it warmed up and then it would just die at around 2500 rpm's. Is your car throwing any codes bro?

01-24-2008, 07:13 PM	#18
ManoNegra Guild of Skullduggerous Intent Join Date: Jan 2004 Location: Socal Posts: 7,841 Trader Rating: (48) Feedback Score: 48 reviews	I'd also check, if you haven't yet, cap and rotor as well as the intake.

01-24-2008, 07:39 PM	#20
Turtle Zilvia Member Join Date: Jul 2007 Location: California Age: 32 Posts: 221 Trader Rating: (0) Feedback Score: 0 reviews	I too have the same problem I idle at 1900 RPM it sucks, it misfires at idle and off of heavy throttle. Checked timing it lined up good but rpm went up, plugs get fouled easy after like 5 minutes of use. They're not oily or with gas, they're black and dry.

01-26-2008, 03:49 PM	#22
S13Boosts Premium Member Join Date: Oct 2006 Location: VEGAS Posts: 5,292 Trader Rating: (12) Feedback Score: 12 reviews	NEW UPDATES**** i just changed my CTS! i got it from one of my extra sohc's, now when its cold it flickers..... so im guessing its a bad CTS? i dont want to buy a new one and same thing happens input please thanks!

01-27-2008, 12:40 PM	#23
S13Boosts Premium Member Join Date: Oct 2006 Location: VEGAS Posts: 5,292 Trader Rating: (12) Feedback Score: 12 reviews	so i changed both sensors for the CTS no luck anymore input lol i need help bad i needa sell this car ! thanks guys!

01-27-2008, 12:54 PM	#24
270R Zilvia Junkie Join Date: Jul 2002 Location: Bell gardens ca Age: 40 Posts: 359 Trader Rating: (0) Feedback Score: 0 reviews	sounds like your MAF may have crud built up on the actual sensor wire. take some throttle body cleaner and spray but dont touch the wire on your Maf.

01-27-2008, 01:17 PM	#26
S13Boosts Premium Member Join Date: Oct 2006 Location: VEGAS Posts: 5,292 Trader Rating: (12) Feedback Score: 12 reviews	also i will be making a video soon!

01-27-2008, 01:44 PM	#27
270R Zilvia Junkie Join Date: Jul 2002 Location: Bell gardens ca Age: 40 Posts: 359 Trader Rating: (0) Feedback Score: 0 reviews	if possible try swapping it with a known good maf. I had a truck with that problem. or could have an intake leak something could of gotten loose when you hit that bump . try misting your intake with something like starter fluid see if your get a reaction from your idle. just be carefull my two cents good luck...

01-27-2008, 02:24 PM	#29
nousablenames133 Join Date: Mar 2007 Location: Corvallis, Oregon Posts: 30 Trader Rating: (0) Feedback Score: 0 reviews	Bad or dirty IACV. I've had this problem. Cleaning it out with some carb/brake cleaner works as a temporary fix. There was a thread somewhere here on zilvia.com that showed exactly where to spray.