Pontiac Problems? Ask a Mechanic for Answers ASAP
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what was the compression??
is there power to the injector harness???
do you have a noid light to see if the injector is working and being commanded on by the pcm??
ok, just because you commanded it on does not mean it is actually on. thats why you need a noid light to be sure the pcm is grounding the return side.
ok, 300 code, new info not provided.
first, if it clears off idle, I suspect a bad injector.
also some other possibilities, vacuum leak. what is the long term trim only at idle???
low fuel pressure is very common for the 300 code. thats the first thing I would check with the 300 code. it indicates lean condition.
are you saying there is no 303 code??
ok, how about the results of the checks???
ok, looks good.
can you check the fuel pressure???
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is the air filter off??
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50-60 lbs is the spec