03 Envoy 170K no modifications.
In May 2012 Reduced Engine Power light/Check Engine light started coming on randomly - it happens in hot and cold weather, local and highway driving, short and long distance. Lose ability to accelerate, have to restart engine.
Since then over 1/2 dozen visits, local independent shop has replaced throttle body, accelerator pedal/sensor, wiring harness/connectors, ECM. Tech assures me problem has stopped (test driving vehicle 300+ miles total) - and within a day of getting it back, problem recurs.
Apparently, they're test-driving it with panels off because twice when I stopped by to pick it up, they mentioned having to put the panels back on. So I'm wondering if it's possible that when they're replaced, they're crimping some wiring? Does this sound possible, and if so, what should I look for?
Same shop replaced Fan clutch June '11 (not sure if relevant, but others have mentioned it)
Before this, these guys treated me right, but I've spent over $1,000 so far, and I've lost confidence in them. When I do find a new shop, I want to be informed - what should I be expecting?
Thanks in advance - lots of good information here, looking for guidance as I pursue this. I love the vehicle and think it can keep going a while.