Help Please
#1
Help Please
Hi, I have a 98 chevy 350 and it has a bad misfire. I thinks thats what it is it makes loud pinging sound when going up hill and no power. I also have a p0420 code. I noticed a Exhaust leak on drivers side not sure. would that cause it? I have new cap rotor wires plugs. thanks for any help
#4
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It could be a number of things, but bad gas could be the culprit. A little seafoam would be nice to clean out the motor a little bit. The code you're throwing is only for emissions. As long as you don't have a leak anywhere near the front O2 sensors you shouldn't be getting any false fueling unless it's telling the motor to richen the mixture sense the cat is being inefficient.
#6
Hi, thanks for all the replies. I took it to a muffler shop and they said they were fine. He told me that the msd 6al that I have eats up rotors, and that may be my problem. I think he mite be right the last rotor only lasted 6 months can anybody recommend a good rotor.
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Po420 is a missfire code. Check the rotor like you said and if that don't fix it find someone who can put on a scanner and read missfire data and see what cylinder it's coming from? Could be a bad injector. The older vortecs with the spider injectors are bad about that.
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Po420 is a missfire code. Check the rotor like you said and if that don't fix it find someone who can put on a scanner and read missfire data and see what cylinder it's coming from? Could be a bad injector. The older vortecs with the spider injectors are bad about that.
P0420 is catalyst low efficiency. P0300 is misfire