What could it be ?

Asked by Guru1LF7S Sep 07, 2019 at 09:04 PM about the 2004 Chevrolet Trailblazer LS RWD

Question type: Maintenance & Repair

My trail blazer won’t go past 2500 rpms, auto
zone printed out a paper saying it was either
the crank position sensor or a timing sensor,
someone else told me not to waist my money
it was the timing chain stretched. Someone
please help I have done put a map sensor,
plugs, coil packs, fuel regulator on. I’m tired
of buying pets and it’s not the problem

1 Answer
11,255

FJ4072 answered 4 years ago

Doubt it's your timing chain, these are very stout on the 4.2 and would not be common. You need someone with a capable scanner, at least a Tech II, to point you in the right direction.

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