So my car doesn't idle.

[TheKryptKeeper]

It just stopped. It's a 93 240 auto. I cleaned the iacv a few months ago. Can a sensor do this?

Thanks,Krypt

[asoomal]

Does the car die on you? Or does it not idle smoothly?

[TheKryptKeeper]

It dies, if i screw the distributer all the way counter clockwise, it will idle a bit better, but ultimately die. When i say a bit better, i mean a bit better than absolutely horrible. Basically, it doesn't idle

It seems to drive ok, but it is an automatic, so it is tough to keep it from dieing without burning the stall converter.

Any help would be great.

[TheKryptKeeper]

anyone?

please?

[3cpeeo]

You probably jumped timing.

[Tulsa_S-13]

You probably jumped timing.

Wrong.

It's probably the IACV. Cleaning it is only a temporary fix. Trust me, been there, done that. Replace it with a new unit and you should be golden.

[3cpeeo]

[TheKryptKeeper]

Really? Can anyone else confirm this? It didn't slowly get worse, it just plain died.

Krypt

[3cpeeo]

What did you use to clean it? If you used something along the line of carb cleaner, the seals are probably all chewed up by the detergents in the spray.

[TheKryptKeeper]

I got the expensive replacement seals from japan. I'm pretty sure that it's not the iacv, is there nothing else it could be?

[asoomal]

Have you checked for any vacuum leaks?

[Tulsa_S-13]

Read what I already typed.

Replace your IACV. Cleaning it is only a temporary fix, when it starts to fail you're supposed to replace it rather than clean it anyway.

Trust me, I've been here before. On my KA the IACV got to the point of just killing my car instantly.

Replace the IACV, spend the money. If it doesn't fix your problem then well at least you replaced something that probably needed to be replaced soon anway.

[TheKryptKeeper]

Read what I already typed.Replace the IACV, spend the money. If it doesn't fix your problem then well at least you replaced something that probably needed to be replaced soon anway.

Like the engine? Alright man, but i'm just really wary to replace something without knowing that it's the problem.

[TheKryptKeeper]

Bump, new iacv, no change. Any other ideas? Please? The bus sucks!

[TheKryptKeeper]

Anybody? I wanna be sideways again.

[R-Yahne_240]

You probably jumped timing.

lolthis guy timing chain

[TheKryptKeeper]

When i can get it to idle low enough, it looks spot on.

[tctomasc]

check for vac leaks son.

[Dattebayo]

Get your computer out without disconnecting the power to it and check for codes. I can't believe no one said that already...

[sr20det_s13]

Anybody? I wanna be sideways again.

You could do that with a auto didnt know that. Just replace your IACV just encase

[tctomasc]

Theres an auto with a nismo lsd for sale on craigslist in my area. IMO stupid as hell, but it is driftable. Can't you just imagine it shifting during a drift and all of a sudden end up straightening out and going into a wall?? I can.

[TheKryptKeeper]

alright, I did replace my iacv and it did nothing. Still no idle. Check codes? Would it not throw a CEL? Do these engines normally jump a tooth in timing?

Thanks again guys for the help

[r3v_v3ng3]

its either mechanicalpull out your valve cover and check out your timing chain (tdc, slack, etc).

or electricalcheck your ignition system (distributor,wires,coil,plugs, etc.)try unhooking your maf and see what happens. it maybe your maf

[240sxbuffy]

I would check my timming marks if moving dist helps i would be looking at timing marks before IAC.

[TheKryptKeeper]

I checked the timing marks at TDC, but the silver links don't match up to where they start. After the first rotation of the engine, the marks are going to be off the next time around. However, I counted the links and it matches up. There is no way to ensure the bottom chain is on correctly unless I take off the front of the engine and practically remove it. I can ensure that it's on TDC by a screwdriver in the #1 and it is where my timing mark says TDC is. Also, by looking at the valves while cranking the engine by hand, they seem to be correct.

This all kinda skips the point of "can an engine become un-timed by not running for a few months"? I think not. I also have 170-180 psi on all cylinders.

As far as electrical, I replaced the spark plugs, and the dizzy was replaced maybe a year ago.

I'm not trying to disprove anything you guys are saying, but I have no idea what the hell is happening. I'm getting desperate, I'm about to take it to the dealer!!!

Any help is welcome guys, please.

Krypt

[240sxbuffy]

how are the chain guides? is there alot of slack in the chain? iwould next check air intake hoses and vacuum lines. Unmetered air will cause poor idle. yes the marks on the chain will not line up after you turn engine but the marks should and the mark on the cam gear should also line up with cylinder head when crank is at tdc . Next I would do my best to check ignition timing. third have you tested the EGR if that is stuck open then car won't idle. good luck keep me posted

[TheKryptKeeper]

The car has some crappy intake pipe and cone filter on it when I got it, and the reason i got it is because it wouldn't run above 2.5k (MAF sensor). So I got it for 900 and replaced the MAF. I've been fixing it up since. I did check the timing chain when I was removing the top chain guides, but it was only 20% max stretch. I have not checked the EGR or the vacuum lines yet, cause I have no chart to go off of, and it worked a few months ago just fine. It just stopped all of a sudden. I recently replaced 2 fuel injectors, the fuel filter, and ran some lucas through it.

I'm kinda feeling beaten down here. :-(

[TheKryptKeeper]

Oh, and again, I counted the number of chains in between the marks, and it's correct, and when rotating by hand, it looks real good. Intake opens at TDC, closes and BDC, then TDC compression, BDC power, exhaust opens, then repeat. I'm about 97% positive that it is not mechanical timing cause it was working just fine, it just stopped idling well all of a sudden. It still drives well enough, with maybe a slight* loss in overall power.

*like, real slight.

[zstylelowrider]

I am going to agree with checking your egr operation.

[TheKryptKeeper]

Does anyone have a basic idea of how to do that? Is it just a clean out, and check the vacuum on it?