code reader

[ronknerr]

Where do you plug in the code reader on a 92? Thanks.

 

[Dougs91]

Try looking below the steering wheel either left or right side. On my 91 it's on my right side,but should be one side or the other.Good luck

 

[SSTibet]

I think it is on the right side of the steering column, under the knee bolster. Yeah, I agree good luck

 

[ronknerr]

The engineers always try and make it easy, don't they? Thanks for the info.

 

[SSTibet]

The engineers always try and make it easy, don't they? Thanks for the info.

Well I am an enginner and my simple logic does not always work; at least to my darling wife. Somehow I sound too simplistic to myslef but very complicated to others... If you have a problem, find the root cause first, always. Never ever leave it someone else to do this for you. Read, search, spend time to identify the ROOT CAUSE... Ask the question "why" at least 5 times!

Once you get it, it is so so so so simple to fix it.

 

[FX3FX3]

Did you find it?

 

[ronknerr]

Yes, on the right side of the column. There were no codes, though. I still have a cold idle problem.

 

[SSTibet]

What's the problem you are having in cold idle? No start / starts but erratic / starts and dies ???

 

[ronknerr]

It will start only if you hold the gas down a little as you crank. It will stay running as long as you keep the rpm's above 1000, but die as soon as you let off the gas. YOu need to give it gas when you put it in gear or it will die. After the car is warmed up, the problem is less noticable, but will sometimes not start without giving it a little gas when cranking. It is a little like a carburated car when the choke isn't working.

 

[G Winter]

I don't know if it would throw any codes but the egr valve hanging open could cause it to do that.

 

[SSTibet]

Consult with Ken (moderator). I admire his knowledge on Corvettes. But I would tend to say it is either the EGR or IAC valve.

 

[Vettelt193]

check the hoses around the plenum, make sure they are all hooked up. (pull off the plastic covers and check on both sides) check the throttle body to make sure it is tight, and not hanging open for some reason (unlikely, but an easy check). While you are in there, have you cleaned the throttle body recently? -- if not, a good time to do it.

If it runs fine at other speeds, you probably have excess air coming into the engine which is why I suspect a vac. hose got disconnected somewhere.

 

[ronknerr]

Thanks for all the input. I should get time this weekend to check out your suggestions.

 

[Vettelt193]

how did it go? find the problem?

 

[ronknerr]

I started it up Saturday and it ran perfectly. I drove it around a little bit on Sunday, and again no problems at all. I'm not complaining, but I'm not used to having things fix themselves. It may show up again later, but since I didn't get any codes, I'm just going to drive it.

 

[WhalePirot]

Codes are part of, but not all of, the troubleshooting process. They are still engines, albeit computer controlled, but the old basics apply. It is often hard to remember, that as we learn more, we go to the complicated, before the simple. Wanna know how I know that?

One difference is, like any computer, things can be 'fixed' with a reset. This frequently fixes airplane computers as well as it fixes automotive computers. I have found, on more than one occasion, that resetting the ECM fixes a 'problem'. The ECM code may not be a 'hard' code either, meaning it was transitory in nature, and won't recur after a reset.

We jokingly call them 'stray voltage' for aircraft problems which pop up, because they are not real, despite the machine's indications. The ECM is similar. That is why, early in many procedures, a step says to erase the code and see if it returns.