Search results

M
95 GMC K1500 5.7 runs rich. Tried all options

Smooths out a little bit the more it warms up but open loop vs closed loop is not much different. I believe I was loaned a vacuum gauge that reads in kpa instead of in hg so I think I still have a vacuum leak. MAP sensor changes with a handheld vacuum pump on it. Checked coolant temp resistance...
- M95z71
- Post #7
- Jan 5, 2020
- Forum: Engine Performance + Maintenance
M
95 GMC K1500 5.7 runs rich. Tried all options

I put a vacuum gauge on the line. It was 21-22 inches
- M95z71
- Post #4
- Dec 30, 2019
- Forum: Engine Performance + Maintenance
M
95 GMC K1500 5.7 runs rich. Tried all options

1995 GMC K1500 5.7 running rich. I’ve verified all sensors and wiring. Had a vacuum leak under the intake which has been fixed along with new spark plugs. The only sensor that doesn’t check out is MAP. Have 21-22 inches of vacuum at idle and I’m getting a little over 3 volts out of the MAP...
- M95z71
- Thread
- Dec 30, 2019
- Replies: 8
- Forum: Engine Performance + Maintenance