Could it be a bad ECU ?

Asked by 97extendcablilred Nov 18, 2020 at 08:40 PM about the 1997 Chevrolet S-10 LS Extended Cab RWD

Question type: Maintenance & Repair

97 S10 XCab LS 4.3 auto 136k, stalled out at a redlight, shortly after the idle
started going sky high when I applied the brakes or turned on headlights, the
light from the back of the cab and taillight you have to cup in your hands to
see, even at night. Checked all grounds (except fuel pump changed in 2018)
fuses and relays, replaced all and cleaned the grounds. Even unplugged my
trailer hitch light . Could a bad ECU be the cause ?? I'm at mt witts end here

2 Answers
3,360

Justin answered 4 years ago

I'd s9by cleaning the throttle body and idle air control valve, see what that does for the high rev at stopping....after the driving safety issues we can look into the lighting issues

Mark helpful

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