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Old 06-29-2012, 07:17 PM
Orion Orion is offline
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Default misfire with no CEL
Ive checked fuel pressure, and was good then replaced coil, plugs and wires with ac delco ran good for a couple days and is now missing again. replaced opti prior to coil and plugs,wires richporter brand from oriellys. what should i chech next?
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Old 06-29-2012, 08:26 PM
cletus284 cletus284 is offline
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Year, make, model, please...

What brand opti (and other parts) did you use? Did you check the vent harness for proper operation?
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Old 06-30-2012, 07:16 PM
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car is 96 Impala ss, when I changed the plugs notice #7 cylinder plug was fouled with lots of black carbon deposits could I have a leaking injector? It was the only one fouled that way! but car drove really good after plug swap then the next day missing again.
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Old 07-01-2012, 10:05 AM
cletus284 cletus284 is offline
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Make sure the plug connections at the Opti and the plug are secure. Pull the suspect #7 plug and inspect. Again, what brand Opti did you use?
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Old 07-06-2012, 05:05 PM
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richporter, from orielly's.
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Old 07-06-2012, 05:16 PM
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Default misfire with no CEL
Never heard of them. I'd try to take it back if I could,and get an AC Delco.
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Old 07-07-2012, 12:08 PM
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I think I will do that, dont like aftermarket parts anyway but ac delco was expensive! about $200 more.
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