Had a miss and found 2 plugs not firing. Replaced all autolite platinums with Ac/Delco OEM. Still have a miss. But the raw fuel has me curious as to what else besides ignition wires
Ignition wires is agood start , check all wires for spark out put with spark tester saves a lot of time.
SOURCE: P0300 - Random / Multiple misfire
The .030 may cause a too rapid burn time condition. And Yeah, .060 is standard GM on almost any make/model nowdays.. It may be one of ur coils.. but that would show an individual cylinder.. Try the .060's and let me know.. esp if it wasnt doing it before
SOURCE: plug wire burn spots, spark plugs fouling, loss of power, misfire
optispark distributor fails. go to summitracing.com and search optispark. it'll pop right up
SOURCE: I have a 97 chevy tahoe. I changed the spark
the number 6 cylinder is located (if you are looking at it from the front of the car) it is on the left side third cylinder back from the front. you probally have a bad injector that is just dripping fuel into that cylinder.
SOURCE: 1991 Chevy Lumina 3.1 won't pass smog. Changed
If your car runs well, then you're looking at Oxygen sensors that need changed. For your car, they should be changed between every 50 and 60,000 miles. This is the key sensor to the fuel mixture, and likely the problem with your plug fouling as well. Bad oxygen sensors will cause the car to run rich, but it will run ok. There are other sensors that can cause this, but they will make the engine run terribly, such as the MAP sensor. The Coolant Temperature sensor can also cause the same problems as the O2 sensors, but it is very reliable and more than likely not the issue.
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