Quote:
Originally Posted by bebenegro
Hey everyone,
So for a few months now I've been getting a CEL (P0300). My only mod is Stillen Gen 3 Intakes. I haven't taken it to the dealer for a couple of reasons, main reason being that I've figured out how to "avoid" it - but not fix it altogether, second reason being that I've read way too many stories about dealerships switching everything blindly without knowing what they're actually doing.
So the strange thing about my case is this: I've figured out that on the first start of the day (or after more than 5 or 6 hours of not using it) if I turn the car on for approx 10 seconds, turn it off, then turn it back on again immediately after, the light wont come one. However, if I turn on the car in the morning or in the afternoon after a while (again, lets say 8 hours) of no use, the light will come on.
Any ideas on what the hell may be wrong?!? Seems like a fairly specific scenario, but so far (locally) no one has been able to give me an answer.
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So I have a 09 6speed manual with the stillen gen 3. I've been getting p0300 ever since. I replaced fuel pump, spark plugs, coil packs, cam seals, fuel injectors, cleaned out MAFS and throttle bodies, and added a fuel pressure gauge. Still getting a p0300 and bought a smoker unit and couldn't find a leak. 02s look good and catalytic looks good. I stumbled to a weird solution. Push button start to ACC without igniting the engine, wait for 10 seconds and turn on the engine. Do this when the car is cold or haven't ran in 5 hours or so.
This have been working for me for a few months without any issues. If I forget and start the car immediately in a cold start, p300 shows up. I spent enough where I'm not trying to spend any more. I think it may be an ECU problem. It's all stock and no tunning.