I Seriously Need Some Help Please. - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Walperstyle · 01-31-2012, 06:11 PM

swap out IACV, but also check your intake like I said.

demonspeed · 01-31-2012, 06:19 PM

Have you checked your timing? It sounds like a timing issue OR have you disconnected your battery to reset your ecu?

AndyG · 01-31-2012, 06:30 PM

Quote:

swap out IACV, but also check your intake like I said.

aight.

Quote:

Have you checked your timing? It sounds like a timing issue OR have you disconnected your battery to reset your ecu?

When i got the car it had no battery so i guess the ecu is reset?

with the timing i have no idea.. how do you check? when i look at the dizzy the first cylinder cable is in like the 4oclock position.. searching i have found that advancing makes the top end horsepower increase so maybe it is way advanced???

r33nota240 · 01-31-2012, 09:02 PM

just another idea i have seen cars with bad grounds do what ur talking about and cars with bad FPRs

bussitcustoms · 01-31-2012, 09:13 PM

Is your IAT sensor hooked up?

AndyG · 01-31-2012, 09:21 PM

WTF. The guy i bought this from was stupid. the markings on my main pully are undr the car next to the oil pan.... also i think the dizzy is upside down..the first cylinder cable is in the 4oclock position. is it safe to drive like this???sooo help please???

edit: ahha opps i think you have to rotate the pully... im new to timing systems...oops

JasianBlazin · 01-31-2012, 09:21 PM

Quote:

Originally Posted by AndyG

When I turn the car on it jumps up to about 1200 then it comes down to between 700 and 900 back and forth. Shakes a little too.

I looked inside the throttle body and it is a brownish gold color on the inside..

Try cleaning the throttle body with some tb cleaner, see if that helps any.

Walperstyle · 01-31-2012, 09:25 PM

lol unfortunatly for you I have KA24DE timing explained on youtube. not E.

AndyG · 01-31-2012, 09:28 PM

Quote:

ol unfortunatly for you I have KA24DE timing explained on youtube. not E.

haha already watched that.

AndyG · 01-31-2012, 10:53 PM

so... after an hour of searching the interwebs....i dont think it is the timing.

If it was the timing then why would it pull hard in first and second every once in a while. I would think it would never shift power because the timing doesnt change llike that... idk... need suggestions...

Quote:

just another idea i have seen cars with bad grounds do what ur talking about and cars with bad FPRs

ill look at themm..

Quote:

Is your IAT sensor hooked up?

yes. is there a way to test it??

AndyG · 02-01-2012, 11:35 AM

i tried to get some numbers on power today...0 to 60 is almost 20 SECONDS! that is horrible. most of the power is from 35mph and up.
60 to 100 is like 6 seconds.

im really getting sick of this and i am starting to second guess myself... how can you check timing without a light?

JasianBlazin · 02-01-2012, 11:39 AM

Quote:

Originally Posted by AndyG

i tried to get some numbers on power today...0 to 60 is almost 20 SECONDS! that is horrible. most of the power is from 35mph and up.
60 to 100 is like 6 seconds.

im really getting sick of this and i am starting to second guess myself... how can you check timing without a light?

i don't think you can check the timing without one, just go out and rent one ...or buy one for like 10-20 bucks.

AndyG · 02-02-2012, 05:41 PM

update: so i filled up for the second time today... i calculated my gas mileage and it is 13!!! wow... so it is running really rich.. any help??

AndyG · 02-14-2012, 11:19 PM

UPDATE: So i made big progress today. i checked my ignition timing and it was as advanced as it can go. so i fixed that and it still ran a little slow so i unplugged the TPS and redid the ignition timing to where idle is around 900. That almost completely got all my power back. BUT i cant plug my tps back in because it runs slow. so i guess ill get a new TPS. but i am so happy to finally get this crap fixed. now i can focus on suspension and performance. =]

c-los13 · 02-15-2012, 06:33 AM

You should get the wire plugs, its hard to tell when they good or not, my old dohc ran horrible till i swapped those out. Just to be sure ya know?

mrmittens · 02-26-2012, 12:21 PM

Don't know if this will help at all, but my car has the wandering idle as well, just a lot more extreme sometimes (between 400 - 1200), and the last time was because of the idle air control valve (IACV) and the throttle body being too dirty. The way it was explained to me was that when I disconnected my battery for a while, one of the computers "forgot" the information about where the IACV was supposed to go on idle, and I therefore stalled a few times because it was trying to bring it to factory settings until I had it cleaned. After, I had to disconnect the battery again to reset it again and then run it. Stalled a few times on the way home, but by the time I got back, it was running smooth(er). As you did clean before, one thing you can do is to check it again and see if it is built up already. If it is, then you probably have something contaminating your engine (as in a hole in your intake or something that is causing stuff to get into your engine without being filtered).

I was told this by a mechanic that has done good work on my car, so I am willing to trust what he says, but it could just be my situation and not yours. Hopefully cleaning helps.

AndyG · 02-26-2012, 06:48 PM

I have cleaned it lately and it helped with the idle wandering... but i still have a low power problem and a cut in power around 3000 rpm. also it is a solid idle around 1200 so i guess i will replace the tps soon.

Walperstyle · 02-29-2012, 12:44 PM

instead of cleaning the maf, try swapping it with a friend for troubleshooting purposes.

Nicelyphe · 02-29-2012, 12:47 PM

Did you adjust the idle screw on the IACV?

AndyG · 03-04-2012, 12:37 PM

UPDATE:
Okay so i was able to replace some stuff today. and it is stil running rich and has the same power problems.

I got a new coolant temp sensor and new belts.

Also i got a test pipe.

i also put a guage on my fuel line and i reads 34 at idle and alound 40-42 with revs..also after about an hour with the car off the pressure goes to 0.. is that normal? i guess i will look into a fpr.

My power steering pump is creaking bad when i turn left. do you think that can screw up my power issues??

also the selenoid on the aicv buzzes.i think it is the aac. i guess it is stuck? help please!
Thank you!

AndyG · 03-04-2012, 06:00 PM

2 more things.... sometimes after it has been sitting awile it is hard to start and when it does it misfires bad and idles at like 300 rpm. then i give it some gas and it idles normal but the distributor squeaks for like ten seconds..

and when im driving it kinda cuts out at 3000 and comes back at 3500... TPS volts are fine... please help me this car is driving me crazy.

01-31-2012, 06:11 PM	#31
Walperstyle Nissanaholic! Join Date: Nov 2004 Location: Alberta, Red Derp Age: 44 Posts: 1,729 Trader Rating: (0) Feedback Score: 0 reviews	swap out IACV, but also check your intake like I said. __________________ KA-T ORG-Function over Flush

01-31-2012, 09:21 PM	#36
AndyG Leaky Injector Join Date: Aug 2011 Location: GA Age: 34 Posts: 116 Trader Rating: (0) Feedback Score: 0 reviews	Holy crap update WTF. The guy i bought this from was stupid. the markings on my main pully are undr the car next to the oil pan.... also i think the dizzy is upside down..the first cylinder cable is in the 4oclock position. is it safe to drive like this???sooo help please??? edit: ahha opps i think you have to rotate the pully... im new to timing systems...oops __________________ -Andy Last edited by AndyG; 01-31-2012 at 10:20 PM..

01-31-2012, 09:25 PM	#38
Walperstyle Nissanaholic! Join Date: Nov 2004 Location: Alberta, Red Derp Age: 44 Posts: 1,729 Trader Rating: (0) Feedback Score: 0 reviews	lol unfortunatly for you I have KA24DE timing explained on youtube. not E. __________________ KA-T ORG-Function over Flush

02-01-2012, 11:35 AM	#41
AndyG Leaky Injector Join Date: Aug 2011 Location: GA Age: 34 Posts: 116 Trader Rating: (0) Feedback Score: 0 reviews	i tried to get some numbers on power today...0 to 60 is almost 20 SECONDS! that is horrible. most of the power is from 35mph and up. 60 to 100 is like 6 seconds. im really getting sick of this and i am starting to second guess myself... how can you check timing without a light? __________________ -Andy

02-02-2012, 05:41 PM	#43
AndyG Leaky Injector Join Date: Aug 2011 Location: GA Age: 34 Posts: 116 Trader Rating: (0) Feedback Score: 0 reviews	update: so i filled up for the second time today... i calculated my gas mileage and it is 13!!! wow... so it is running really rich.. any help?? __________________ -Andy

01-31-2012, 09:02 PM	#34
r33nota240 Leaky Injector Join Date: Nov 2011 Location: overland park ks Age: 40 Posts: 116 Trader Rating: (1) Feedback Score: 1 reviews	just another idea i have seen cars with bad grounds do what ur talking about and cars with bad FPRs

01-31-2012, 09:13 PM	#35
bussitcustoms Zilvia Junkie Join Date: Jan 2012 Location: philly pa Posts: 409 Trader Rating: (5) Feedback Score: 5 reviews	Is your IAT sensor hooked up?

02-14-2012, 11:19 PM	#44
AndyG Leaky Injector Join Date: Aug 2011 Location: GA Age: 34 Posts: 116 Trader Rating: (0) Feedback Score: 0 reviews	UPDATE: So i made big progress today. i checked my ignition timing and it was as advanced as it can go. so i fixed that and it still ran a little slow so i unplugged the TPS and redid the ignition timing to where idle is around 900. That almost completely got all my power back. BUT i cant plug my tps back in because it runs slow. so i guess ill get a new TPS. but i am so happy to finally get this crap fixed. now i can focus on suspension and performance. =] __________________ -Andy

02-15-2012, 06:33 AM	#45
c-los13 Zilvia Junkie Join Date: Feb 2010 Location: Edinburg, Texas Age: 36 Posts: 446 Trader Rating: (0) Feedback Score: 0 reviews	You should get the wire plugs, its hard to tell when they good or not, my old dohc ran horrible till i swapped those out. Just to be sure ya know?

02-26-2012, 12:21 PM	#46
mrmittens Join Date: Jun 2011 Location: California Age: 35 Posts: 32 Trader Rating: (2) Feedback Score: 2 reviews	Don't know if this will help at all, but my car has the wandering idle as well, just a lot more extreme sometimes (between 400 - 1200), and the last time was because of the idle air control valve (IACV) and the throttle body being too dirty. The way it was explained to me was that when I disconnected my battery for a while, one of the computers "forgot" the information about where the IACV was supposed to go on idle, and I therefore stalled a few times because it was trying to bring it to factory settings until I had it cleaned. After, I had to disconnect the battery again to reset it again and then run it. Stalled a few times on the way home, but by the time I got back, it was running smooth(er). As you did clean before, one thing you can do is to check it again and see if it is built up already. If it is, then you probably have something contaminating your engine (as in a hole in your intake or something that is causing stuff to get into your engine without being filtered). I was told this by a mechanic that has done good work on my car, so I am willing to trust what he says, but it could just be my situation and not yours. Hopefully cleaning helps.

02-26-2012, 06:48 PM	#47
AndyG Leaky Injector Join Date: Aug 2011 Location: GA Age: 34 Posts: 116 Trader Rating: (0) Feedback Score: 0 reviews	I have cleaned it lately and it helped with the idle wandering... but i still have a low power problem and a cut in power around 3000 rpm. also it is a solid idle around 1200 so i guess i will replace the tps soon. __________________ -Andy

02-29-2012, 12:44 PM	#48
Walperstyle Nissanaholic! Join Date: Nov 2004 Location: Alberta, Red Derp Age: 44 Posts: 1,729 Trader Rating: (0) Feedback Score: 0 reviews	instead of cleaning the maf, try swapping it with a friend for troubleshooting purposes. __________________ KA-T ORG-Function over Flush

02-29-2012, 12:47 PM	#49
Nicelyphe Zilvia Addict Join Date: Jan 2010 Location: PA Posts: 918 Trader Rating: (16) Feedback Score: 16 reviews	Did you adjust the idle screw on the IACV?

03-04-2012, 12:37 PM	#50
AndyG Leaky Injector Join Date: Aug 2011 Location: GA Age: 34 Posts: 116 Trader Rating: (0) Feedback Score: 0 reviews	UPDATE: Okay so i was able to replace some stuff today. and it is stil running rich and has the same power problems. I got a new coolant temp sensor and new belts. Also i got a test pipe. i also put a guage on my fuel line and i reads 34 at idle and alound 40-42 with revs..also after about an hour with the car off the pressure goes to 0.. is that normal? i guess i will look into a fpr. My power steering pump is creaking bad when i turn left. do you think that can screw up my power issues?? also the selenoid on the aicv buzzes.i think it is the aac. i guess it is stuck? help please! Thank you! __________________ -Andy

03-04-2012, 06:00 PM	#51
AndyG Leaky Injector Join Date: Aug 2011 Location: GA Age: 34 Posts: 116 Trader Rating: (0) Feedback Score: 0 reviews	2 more things.... sometimes after it has been sitting awile it is hard to start and when it does it misfires bad and idles at like 300 rpm. then i give it some gas and it idles normal but the distributor squeaks for like ten seconds.. and when im driving it kinda cuts out at 3000 and comes back at 3500... TPS volts are fine... please help me this car is driving me crazy. __________________ -Andy