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Today when I was going to church I started my 96 chevy k1500 with a 350 vortec when I noticed that the exhaust seemed to be dark. I let it warm up a little and it was still dark there didn’t seem to be any loss of power or anything so I drove it to church. After church I started it paying more attention to the exhaust and it wasn’t dark however it did smell a little like gas. The exhaust is dialed out the sides and it seems to only be the driver side that was doing this.
One, thing is that one day a week or two ago I walked by the exhaust and it sounded like the exhaust skipped a little.
Two the hole that the distributor cap screws into is broken it fits the screw in and screws down but not only half the hol is there if I took it out I probably couldn’t get it back in.
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Haha I did actually just toda po300 multiple misfire which is odd because all the ingnition stuff is new except for the distributor shaft and coil but I plan on checking my plugs and wires ect.. Today
Yep, a loose distributor cap can cause misfires which may explain what you heard at your exhaust. But when you road test it what’s it doing then? If it’s really missing, or backfiring, hesitating at speed under load, then I’d first look to your ignition cause you find a problem there anyway.
If you don’t have a scanner available to you even at a local parts store to see if you have any codes, then I’d start by fixing what sounds like a loose distributor cap. Try using the properly sized screws or check to see if you have to tap and rethread a hole because a screw broken off.
I’d check the inside of the cap for cracks, carbon tracking, etc., and when it’s running, you can mist spray a little water on the cap itself and check for sparks or arching. If you see that on the cap, replace it and see if that solves your misfire. If it’s still missing, check your plug wires and boots.
I checked my plugs wires and cap everything looked good. Except where the rotor screws on to the shaft there was some play that didn’t feel like it should be there. So I replaced the distributor shaft, rotor and cap. So far so good no more smelly exhaust an no more po300 codes. It also seems to have alot better throttle response.
Yea !!! Nice work.
Hope you didn’t toss that old shaft into the trash. You might be able to rethread or tape the holes and give it a second chance.Happy motoring !
Mark.
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