Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello my name is ***** ***** I am an ASE master certified mechanic. It sounds like you have some kind of vacuum leak. Please respond for further instructions for testing when you are ready.
Does the car have an EGR valve?
According to my resources it does, are you sure?
It may be back behind the engine near the firewall. Another way you can find it is to locate the exhaust and see if there is a pipe coming out of it up towards the engine. Follow that pipe to the EGR valve.
Surging idle might be caused by a bad IAC motor too. When you do a cold start or the first time you start your car for the day, does it rev up and then slowly idle down?
I noticed you have a live data scan tool. Can you give me the readings for the O2 sensor short term adaptives?
If you get your live stream up you will see you have two data readings for O2 sensors. One is short term and one is long term. With these readings, you can determine very quickly what is going on inside the combustion chamber. Short term is the most important reading
That's fine, I will wait. Remember they are called O2 B1S1 short term and O2 B1S1 long term or something of that sort
No, those are voltage readings. Does it have any other readings pertaining to O2 sensors?
I did look up the surge diagnostics and it said to check the O2 sensor readings. If you are going to fix this yourself, go buy a different scan tool from O'reilleys that reads data. I recommend the bosch one that I bought from them
Let me go get it
Ok, it is the OB2 1100 series. I paid $99 for it. Worth every penny. I sold my other scan tool.
At Oreileys of coarse
That's fine. Don't buy anything else if you can help it unless they say it will give you livestream data. I used this scan tool at the dealer every day. I used it on dodges, jeeps, nissans, fords etc.
Have a happy 4th
Have you figured out the O2 sensor readings yet?