LQ4 won't stay running, no codes
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LQ4 won't stay running, no codes
Hello all, I have an '01 Denali with 240k that was used as a daily driver/commuter. It recently took a dive and is hard to start, when it does it will not stay running without holding the gas. I have no codes when scanned, just the "service engine" light that has been on a while. I'm wondering if it could be the coil packs, since they are the originals. I'm purchasing a new Denali, but would like to get this running to use as a car to make my JY runs in. Also can I use the round coils as a replacement if I change the bracket? Any direction offered would be appreciated.
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Fuel pressure is good, new pump and checked at fuel rail. The plugs have less than 200 miles on them. I'll start with cleaning the MAF and throttle body.
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#9
Take an old toothbrush or something and clean/scrub the throttle body with carb cleaner or brake clean. It sounds like you have carbon build up around the body just behind the throttle plate and this is stopping air from getting into the engine at idle.
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