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HELP! P0305 ERROR, Any ideas?

Old May 20, 2009 | 06:39 PM
  #1  
mjf1501's Avatar
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From: GA
HELP! P0305 (misfire Cyl 5)ERROR, Any ideas?

I'm getting the P0305 error under wide open throttle at 4200 rpm. It stumbles, no pinging, just breaking up. If I stay in it, at about 4800 ish it smooths back out. The check engine light flashes while it stumbles.
I replaced the plug, injector, COP, and the O2 sensor on the drivers side back.
Still get the same error! Anyone have any ideas what to check next?

TIA,
MJ
 

Last edited by mjf1501; May 20, 2009 at 07:43 PM.
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Old May 20, 2009 | 08:04 PM
  #2  
Quintin's Avatar
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From: Georgia on my mind...
You need to check compression and leakdown next, rule out a base engine problem.
 
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