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Why would a 97 Jimmy Vortec 43 severe misfire no codes runs good at idle but after that really misfiring and it will not do a complete OBD scan quits after the first three monitors?
Wiki User
∙ 17y ago
replace spark plugs !!! chances r one is cracked !!!! Either spark plug(s) or, check the timing
Wiki User
∙ 17y ago
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Why is p304 code on 1995 4.3 vortec?
multiple random misfire on 4.3 vortec why?
What might cause a 4.3 vortec to misfire on 6?
burnt valve...
If your 1997 GMC 5.7L Vortec has a misfire at idle but not while under throttle whats the problem?
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try changing the cap and rotor
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Type your answer here... I had the same problem with my 96 Tahoe.. Vortec 350. Problem was a blown intake gasket.
On a 5.7 Chevy vortec multiple misfire code po300?
Although there are several things that can cause this code. The most common on the vortec is a bad distributor cap. When you replace the cap. Do NOT use a cheap cap and always use ac delco plugs in a vortec. They are very picky with ignition. If you need it timed afterwards you will have to use a scan tool and set it plus or minus 2 degrees of 0 while watching the cam retard on the scan tool.
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Vortec
What kind of damage can water in the engine cause From driving through a deep puddle my engine is now misfiring on a 2004 GMC Sierra six cylinder 4.3 Vortec Engine?
Your spark plug wires are probibly wet where they get contact with the plugs so just dry them off
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Regardless of the block, you have to use Vortec heads to use a Vortec intake.
