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If you are talking about the actual idle set screw and it's aTBI that's a big no-no. If you are tying the throttle open to keep it running, you should quit driving it until you get it figured out (I understand if it a daily). If it's TBI I'd bet money on one of the 2 injectors failing
Or the pressure regulator, which is just a small diaphragm in the throttle body, but a new one is included in a rebuild kit. Let me know if it is TBI or not, if it is. I have a GM service manual and can send troubleshooting info
If you have a better flowing TBI engine (not stock), you'll want to adjust the Minimum Idle screw or your IAC will be way out of spec. You'll want a scanner so you can watch IAC steps as you adjust the screw until you get it close to 10 (up to ~40 is OK) with fully warmed up engine and no accessories running. Then reset your TPS by pulling the negative battery cable so, it goes back to 0%. HTH
Oh shoot... your right, thats my bad. It's been so long since I've done anything other than fixing a daily for someone I immediately go to factory/service specs in my head lol
LIke I said, I understand if it's a daily, but when you get a minute, pull off the air filter and take pictures of what throttle body you have. There should be a code stamped into it on the front be sure to get that too
Can do. I will run the #s. First I will check the injectors to verify that they are both still good. Was advised that could very well be the issue.
Are these gauges for the engine or the trans?
