Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I’m Ron and I can help you.I have been in the auto repair business with my own shops since 1975 and also teach automotive repair. I am confident we can resolve your problem together. Please understand that I don't know your skill level. In most cases when you have a problem with the way the vehicle performs, specialized tooling is required to acquire computer data/information or engine testing results. We didn’t build these complicated vehicles; we just diagnose and fix them. Also understand that I can't see, smell, hear, or touch the vehicle either, so it may take a few replies to get to satisfactory results. I am also going to direct you with the fastest, easiest and most common things to check first. Please be patient and permit me to do what I do best.I also try to give all of the information you may need, expecting a “positive rating” in return. I will also continue assisting you after you have rated me, if necessary. If there is any reason I cannot get a positive rating, please let me know why “in advance”, so I can go another direction for you. I am sorry you’re having this problem; I’ll help you through it.
You should do a compression test and also look for vacuum leaks and scan the computer for codes.
I did read everything, it doesn't say anything about what I asked you. This can be a computer problem due to the new information. Do some bidirectional commands with you scan tool to verify.
Thanks again, and please don't forget to rate me and keep this link in case you need me again later on.
Pressure is good. I would check compression for valve timing being off.
It is important to run the other tests recommended too. Guessing is very tough:)
MODE 6 tests for computer malfunction.
It could run good if the computer is adding a lot of timing to compensate for a malfunction. These tests are important.
Thanks again, and please remember to rate me for my time.
It's one of the 9 functions your scanner is capable of. It tells you data that the computer sees and calculates.
here is a link about MODE 6. I teach a 5 day course on this, 8 hours a day. It isn't anything that can be done in ten minutes because it's extremely involved.
Thanks again, Ron
I'm sorry, but I am not familiar with all the scan tools that are out there. Your tool does have a section in it for information like this. I hope you don't let this reflect my rating, we just can't know every tool that everyone has.
If the oxygen sensor is staying stuck in one range it can richen or lean the fuel ratio causing similar issues you are having.
Ok sounds good!
Are you meaning what is the ECU pin for the oxygen sensor?
Awesome glad to hear