Thread: help needed imediatly!

Good Lord dude, Ive troubleshot a lot of cars in my time, but quite frankly you have a weird one.

Im not sure your head gaskets are an issue. The #2 Im not so sure warrants a head gasket change and I doubt would cause the car not to start. The stuff on your oil cap is likely from condensation mixed in with the oil and it collects on the oil cap like that. As long as the oil itself is not milky then I would think you are okay.

In response to the PCM being the issue, I can only say its possible. I say this only because on my '89 GP I had, the PCM went bad in it and it wouldnt start obviously. As much as I cannot rule it out as a possibility, I cant say definitely either because it is far from being a common occurance.

You said you unplugged the MAP. Was it the MAP or the MAF that you unplugged?

sorry haha the MAF on the TB. and i know i dont hve to worry about the heads right away but down the road after i get it running...and its going to cost me 80-100 just to get it diagnosed so i was thinking about just biting the bullet and getting a zzp 1.0? and also, i got some 104's today. what should igap them to?

I'll be praying it is the IAC. Its not bad, it just means your in the middle of an engine refresh. Oh, also, the 104's should be gapped the same, probably around 0.055" to be safe.

I wish I had been able to pin point it for you without you having to buy the other stuff you did. The IAC is just not something known to go bad and thus, theres not a lot to go on as to what it can do when it fails short of a stumbling idle, fast idle, things like that. I have never ever seen one go bad and cause a no start, but thinking about it, now, in hind sight, if that sucker failed in completely closed state, I can see it happening.

mines the same way, it starts up fine and idles fine but you give it some gas so bogs down.

Originally Posted by riceburner

well, it starts and runs under its own power, but it sputters ALOT and surges between 500 nand 1500 at idle, and runs hard when in drive....is it just in need of a relearn? or what?

So you replaced the IAC motor and it at least starts up and runs now?

The idle surges could be the PCM relearning but I would expect that to clear up literally within a few minutes. You could have a vacuum leak in one of the vacuum lines but Im not 100% certain of that but it may be worth checking all the lines just to make sure.

You shouldnt need a CASE learn, but I would expect the computer to have to relearn the IAC to a point (really its just trying to find the optimal place for it, not really relearning). Once it settles down, are you able to drive it? Maybe take it around the block or something, see if it just needs some drive time?

Excellent, progress!! Does it still surge when idling now?

Outstanding, I'll be trying to keep an eye on this as much as I can for your report.

Well, this is new, and not good. 4 Liters of coolant is a LOT and I would want to know where that coolant went before you run it much more. It would be good to know what that SES light is on for as well though with it running rough, it may be a misfire code, but nonetheless it would be good to know what the code is.

Check that oil again and make sure its not milky looking. That coolant has got to be going somewhere.