I changed out my intake manifold the other day, just with another ls one because it was a lot cleaner, torqued down everything right, cleaned the iac valve, injectors, throttle body, and I'm getting a check engine light for the FUEL SUPPLY SYSTEM....would the Iac make my car run like shit??? I dont think it would but idk... the car ran and idled fine before I swapped it out, and now its burning fuel like a motha****er.. when I get off the highway sometimes it bogs/hesitates but it catches back and runs fine...someone plz help me out I need this car as my DD its all I got...I got off the highway and as soon as I threw it into neutral it was like a white/grey smokescreen..It didnt smell like the headgasket at all, more like unburnt fuel burning away..
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CEL CODE 43; LS idling /smoking problem
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