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2009 chevrolet avalanche 5.3l v8 flex fuel active fuel management changed plugs

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1 month 3 weeks ago #67282 by RookieMechanic24
2009 chevrolet avalanche 5.3l v8 flex fuel active fuel management changed plugs was created by RookieMechanic24
I have a 2009 chevrolet avalanche with a 5.3l v8 flex fuel active fuel management a cpl months ago I heard a ticking noise followed by loss of power the codes was a po308 so I changed the coil packs plugs etc it seemed to have gotten a little better still throwing the p0308 I also put a brand new throttle body on it can anyone guide me as to where to go from here. Thanks in advance. MARY

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1 month 2 weeks ago #67290 by Chad
Replied by Chad on topic 2009 chevrolet avalanche 5.3l v8 flex fuel active fuel management changed plugs
What did the spark plug look like? Was it clean? Or, was is oil fouled?

Disable the fuel and crank the engine. Does the engine cranking sound steady and continuous? Or, is there a rhythmic cadence, indicating a compression imbalance?

Here is a video of ScannerDanner doing this check.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right. :-)

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