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at a loss. replaced MAF

So I had a power performance issue with bucking, which got worse, finally threw a code for MAF out of range, and after watching Fuel trims LT+25, I pulled the sensor plug, and it restored all power and no bucking. So i buy a new Delphi AF10057 MAF, install it, and now fuel trims are averaging...
- Chevy Express
- Thread
- Aug 22, 2022
- Replies: 65
- Forum: Engine Performance + Maintenance
C
its a 99 and a van.... and a p0171

Guys, looking for a bit of help. I have a 99 7.4 3500 express van cut away (motor home). p171, and severe bucking under load, when going over a bouncy road. 67k on engine. I have watched a ton of video's on the injectors and fpr replacement. What I haven't seen is one done on a van. Does anyone...
- Chevy Express
- Thread
- Apr 24, 2022
- Replies: 2
- Forum: Engine Performance + Maintenance