Idle problem solution - Page 5

BORNGEARHEAD · 02-06-2006, 11:10 PM

Quote:

Originally Posted by dvsmonkey

so how do i check for idle screw clogs and fix them? the base idle screw barely affects the idle at all when in timing mode. i can get the idle down from 1500 to 1250 rpm, but that's about it - which is why i haven't been able to adjust my timing yet

Try to adjust your timing at 1250rpm. If your timing is off, it can bring the idle down too. Adjusting timing some, may bring your idle down to spec.

Loe Lyf · 03-13-2006, 10:45 AM

My problem. 93 NX with BB DET - USDM ECU and emanage. TUned right (been tuned the same way for years). When the engine is cold, it will not idle (450-600 rpm). Once I reach operating temperatur, it's pretty good, but not great. Sometimes idles at 1200, 1600, 900, jumps up and down, whatever it feels like. Timing is 15 degrees. No idea what the problem is, but it's getting on my nerves.

nxfornx · 03-17-2006, 01:14 PM

Quote:

Originally Posted by BORNGEARHEAD

Try to adjust your timing at 1250rpm. If your timing is off, it can bring the idle down too. Adjusting timing some, may bring your idle down to spec.

I agree with this. This may be too obvious, but also make sure your throttle cable is not too tight - that would give an artificially high idle.

worldcrafter · 03-17-2006, 07:00 PM

Quote:

Originally Posted by nxfornx

I agree with this. This may be too obvious, but also make sure your throttle cable is not too tight - that would give an artificially high idle.

and I agree with this. My throttle cable was too tight after I did my spacers, leaving the throttle body valve open slightly, causing my car to idle at 1500+ rpm. outlaw spacers give very little room for adjustment after installation of the throttle body spacer. I just got used to the tightness, easier to get the power I need down low

Theheadsn · 08-21-2006, 12:53 AM

I have a 1995 200sx se-r and lately it seems to want to stall out when I throw it in Neutral, and slow down to a stopsign/light, it starts to slowly bog down and dies. Not all the time, maybe 10-15% of the time. If I press the gas while in Neutral while I'm slowing down it seems to correct the problem. Dont really have a problem either other way, just when the cars cold or the first time I'm running it, kinda gives me problems too. Any help would be very appreciated. Loved the info in the beginning, and going to use the hell out of it if anyone doesnt know what I can do about THIS particular problem.

districtborn19 · 09-15-2006, 10:31 AM

God dangit. 91 SE-R. Uncommonly high idle.... I'm talking 4250. There is a crack in the hose that comes from the airbox, but that should prob. weaken the car.

I've searched , but all of the threads have been about low idle.

SE-Riouse_93 · 12-05-2006, 12:22 AM

heres my idle issue, my car starts fine cold in the morning, and i just mess with the gas when its cold and starts to idle irratically only when its cold, but when its hot it idles fine with no jumpy idle, so i have like a cold idle problem

and in the morning when i rev it cold it misfires starts burning up raw fuel, black smoke for a bit, then cold idle starts to work good,, what could it be, FPR??? ive cleaned out the aac valve regrounded maf, and still the same...

Shawn B · 12-13-2006, 10:52 AM

Two things to add.

Any exhaust leaks at your header/exhaust manifold will result in a crappy idle and possibly hesitation. The O2 sensor is getting air from outside the engine, and it will be very confused.

Also, if the Engine Coolant Temperature sensor is getting a faulty reading, either a bad sensor or wiring, the motor will run like ass. Crappy, fluctuating idle, possibly dieing on you, bad hesitation under load or any time you attempt to accelerate. The ECT controls a "choke" that dumps extra gas when your engine is cold. If the ECT is faulty in any way, it will dump gas when the engine is hot. Flooding the engine.

2 cents

rEf1eX 22 · 02-04-2007, 04:16 PM

where should a normal idle be?
i read people have it anywhere between 750rpm-900rpm but when mine is anything under 1000, the car starts to sputter

i've played with the IACV and still have the same issue

ice · 02-07-2007, 12:49 AM

ok guys i just cleaned my TB and got rid of my EGR stuff now my idle goes from 400rpm and almost dying on me to about 1500rpm continously and is driving me nuts....i checked basically everything on the list.

what about cleaning the TB messes up the idle? maybe i migh tof left a hose to loose?

Jay200sx · 04-23-2007, 01:10 PM

i put on a short ram on my car. when i start it up after its been off for a few hours or over night it idles high. so i back out of the driveway it runs fine.. i shift into first gear and the car jumps like its got a 2 year old behind the wheel, like im pressing the gas then letting off over and over causing it the jump. so i shift into second and it does the same for a sec. it only does this when its warming up. cometimes when i start it it dies so i have to rev my engine. any suggestions?

spacegoer25 · 11-04-2007, 11:59 AM

hi,can u help me,my black top 180 wont rev over 2000 sumtimes,it comes into it when car is stationary after a drive.i have disconnected the maf sensor while its doing this,and its still the same,i cannot figure out my problem,wait for reply,tanx

BenFenner · 11-04-2007, 12:56 PM

spacegoer25, you might want to search the forums for someone else with the same problem. If that doesn't work, you should make a new thread in this part of the forum. I don't know if this thread is the right place for your question. Not many people will see it here, and it seems to be off topic.

SENTRASER · 11-04-2007, 01:01 PM

Bad MAF or bad MAF wiring spacer.

GT2876RBLUBIRD · 11-04-2007, 02:56 PM

i have had ongoing idle issues with my car that i have yet to figure out.

ive

checked tps
cleaned aac valve
replaced aav valve
adjusted tps in voltage specs
checked for vacuum leaks
i have -18in hg vacuum
tried to get it into timing mode to adjust timing to stock base and got no results

im running FOR ENGINE MANAEMENT:
AEM EMS
AEM WIDEBAND UEGO
AEM 3.5BAR MAP
AEM AIR INTAKE TEMP SENSOR

i cannot figure what it is

the idle isnt steady it slightly goes up and down at around 1300rpm, WILL not go any lower, adjusting my AAC valve makes almost no difference in the rpm idle. like i said i cleaned the aac and replaced the aac and still no results in anything

also my aem ems uego always seems to never be 100% stable it always is jumping from 16:1-17:1 back and forth back and forth at idle, never stable

SENTRASER · 11-04-2007, 06:06 PM

Start a new thread please, this is a thread about stock idle problems, not with AEM EMS installed.

Pretty White · 07-08-2008, 05:47 AM

I am about thru with this car this year. I checked the MAF wiring and rewired it. Maybe bad gas, Seafoaed it. Changed fuel filter. Nada. Last week, jiggled the coolant temp sensor wiring, reproduced the symptom, but unable to do it again. What happens is the engine temps take forever to raise even in this heat. And now it is dropping at idle and the idle gets lopey. Any ideas where tow check next?
I cleaned the T/B, and the MAF was regrounded years ago. I am wondering if ShawnB had it right with the ECT. Gotta check the fuse, EGR and the sensor/wiring next. Seriously thinking it is the ECT.

SuperblackZ · 07-08-2008, 12:16 PM

Quote:

Originally Posted by Pretty White

What happens is the engine temps take forever to raise even in this heat. And now it is dropping at idle and the idle gets lopey. Any ideas where tow check next?

Check your thermostat. Mine was stuck open, car took forever to warm up, and the temp gauge would drop at higher speeds in cooler weather, or even normal days.

I've never had a Nissan with a bad thermostat, but it was, and it cured a host of woes including really crappy running when first starting the car - the engine just wasn't warming up circulating all that coolant.

May sound whacked, and I otherwise wouldn't believe it if it hadn't happened to my B13.

hth

Pretty White · 07-08-2008, 01:12 PM

Yeah, thats my next move.

Pretty White · 07-09-2008, 02:04 PM

MAF, ECT and all either check out OK or I rewired them. I threw a can of Seafoam in the tank and it seems to be clearing up slowly. I wonder if it bad gas?