Engine Mis-fires on acceleration

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  #1  
Old 06-13-04, 02:15 PM
rdn2113's Avatar
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Question Engine Mis-fires on acceleration

1994 Plymouth Grand Voyager 3.3L V6

engine "misses", sputs, and backfires on normal acceleration. Very slow acceleration reduces or even eliminates the symptoms. Engine gauges are normal; operating temp and oil levels normal; engine does not smoke. Sputting stops when idling, or when higher speed is reached.

Any ideas what this could be? Thanks!

rd
 
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Old 06-13-04, 02:46 PM
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The problem is definately in the secondary ignition system. The ignition wires are the most likely but a cracked plug will do the same thing. I'd just replace the plugs, wires and cap, rotor if it has one.
 
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Old 06-13-04, 11:24 PM
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Thanks for pointing me in the right direction. I'll give it a try and post back later.

Thanks again.
 
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Old 06-15-04, 11:14 PM
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Just wanted to post an update. I changed the plugs and plug cables as you suggested. Everything is working great now. Thanks for the great help!

I examined the old plugs when I pulled them and they looked good - no abnormal coloring or fouling. I did notice however that the plug electrodes were very worn, causing the gap to increase. The cables looked OK but I changed them as you suggested anyway. I also noticed that the fuel filter was original so I changed it as well. Things are running very smoothly now.

Again, many thanks.

rn
 
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