GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi, I'm Ron and I will be helping you today.Stand by for a moment while I prepare your answer.
Okay, so you are running lean with variable misfires from all cylinders. This can all be related to a bad coolant temp sensor that is out of calibration causing your engine to run lean. It's best to test t6he senor first before looking for internal vacuum leaks with a smoke machine.
Here's a shot of what a bad sensor looks like that will cause a problem like yours.
Thanks again and please remember to rate me 5 stars and keep this link in case you need me again later on.
It's possible, the testing will confirm it for you.
Thanks again and please remember that I do not get credit for helping you until you rate me and I can still help you afterwards too.
If you are satisfied with my answer, I would greatly appreciate a 5star rating now and I will still assist you after you have rated metoo if another question pops up. I don’t get credit for helping youuntil you rate me.Thanks again, Ron
Seriously, you want a definite answer when testing the system is required?
Only an idiot would throw parts at problem without doing the diagnostics.
I gave you valid information and this is a pay site. We deserve to be compensated for our time.
I'm more than wiling and happy to walk you through the testing procedures if you have a lab scope and a scan tool. Let me know. We can make guesses all day long and spend money needlessly, let's do it the right way:)
Thanks again, Ron
I never said you were, I was saying that I was NOT and will not change out good parts.
The equipment is there for a reason, there's no magic here, sorry.