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Maxed out fuel trims for no reason??

Anybody else? Problem still exists and an ls swap is looking pretty good right now
- Bernie
- Post #6
- Sep 27, 2017
- Forum: Engine Performance + Maintenance
Maxed out fuel trims for no reason??

Actually come to think of it we checked out the ecm's coolant reading and it matched perfectly to what the gauge was reading
- Bernie
- Post #4
- Sep 27, 2017
- Forum: Engine Performance + Maintenance
Maxed out fuel trims for no reason??

The gauge seems to show the thermostat opening but if it was the coolant sensor would it not reflect on the gauge?
- Bernie
- Post #3
- Sep 27, 2017
- Forum: Engine Performance + Maintenance
Maxed out fuel trims for no reason??

In serious need of help here. I recently bought a 98 sierra with 5.7 vortec at 340xxx km. On a good tank I'll get 200km on a full tank and no more. Occasionally it throws the odd lean code however me nor anyone else is able to figure out why. Upon hooking up a laptop and checking everything out...
- Bernie
- Thread
- Sep 26, 2017
- Replies: 5
- Forum: Engine Performance + Maintenance