1996 Sierra 1500 Blinking engine light
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From: Canada
1996 Sierra 1500 Blinking engine light
Hello, i have a 1996 GMC K1500, 5.7L V8.
I get a blinking engine light at first start up when trucks cold. Code reads Random misfire, Heated oxygen sensors, Idle air control system fault. Truck idles high (1000 rpm) as soon as i put it in drive and start going light go's away. once she cools off it comes back. truck runs great, has no misfire (even tho it throws the code) Ive checked for intake leaks and vacuum leaks, replaced plugs, cap and rotor, then distributor all together. wires are in good condition. Truck has 290 000Km on it.
I get a blinking engine light at first start up when trucks cold. Code reads Random misfire, Heated oxygen sensors, Idle air control system fault. Truck idles high (1000 rpm) as soon as i put it in drive and start going light go's away. once she cools off it comes back. truck runs great, has no misfire (even tho it throws the code) Ive checked for intake leaks and vacuum leaks, replaced plugs, cap and rotor, then distributor all together. wires are in good condition. Truck has 290 000Km on it.
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