Here is a good one that has a few of us debating............
Truck is late '99 auto running:
- TS6 chip
- MBRP 4" turbo back
- K&N intake pipe with AFE Stg2 filter
- 6" lift with 38" tires
Since installing the TS, Exhaust and Filter the CEL light comes on every time I drive the truck, but not in a consistent way to diagnose. Also as soon as the truck is stopped then there is no OBD codes showing.
I have managed to simulate a driving pattern that switches on the CEL light, but can not tie that to a specific problem to go check. Basically after driving a few miles to get the truck warm if I come off the "go" pedal quickly then that triggers the CEL, if I come off very slowly then that does not trigger the CEL all the time. When the truck is cold the CEL doesn not trigger. When the truck is warm I shut it down, restart and drive it triggers as soon as I come of the "go" pedal. So a typcial morning I am a few miles out from home then the CEL light comes on, occasionally [if no one gets in the way] I can drive 10 miles on the way to work without having to come of the gas [much] and the CEL lightstays off [until I totally come off the pedal].
I am thinking this is possibly related to the air sensor.
Anyone have any other thoughts?