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10-19-2021, 08:11 AM | #1 |
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Join Date: Dec 2018
Location: yamhill OR
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Random multiple cylinder misfire when wet/damp outside
Hi guys my truck has been having some engine misfire problems lately.
Truck is a 1998 Chevy 1500 4.3 V6 5 speed manual. When ever the weather is wet or damp outside the truck jerks really bad at cruising speeds. It seems to smooth out if I stomp on the gas. Getting a code for random multiple cylinder misfire. I have checked the dis cap and it seemed fine. Any help would be great thanks ahead.
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1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601 1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037 1998 chevy c1500 4.3L 5speed (My current driver) 2002 Chevy s10 4.3L auto 4x4 1971 mercury monterey wagon 400 auto To many projects! |
10-19-2021, 01:00 PM | #2 | |
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Location: Orlando Florida
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Re: Random multiple cylinder misfire when wet/damp outside
With mine it was the distributor cap.
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10-20-2021, 04:58 PM | #3 |
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Re: Random multiple cylinder misfire when wet/damp outside
How old are the plug wires?
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1995 k3500 cclb srw 6.5 turbo diesel. The lessons that hurt are the lessons that teach. There is always a price to pay. You are free to make any decision you want. You are not free from the consequences. |
10-30-2021, 01:03 PM | #4 |
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Re: Random multiple cylinder misfire when wet/damp outside
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1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601 1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037 1998 chevy c1500 4.3L 5speed (My current driver) 2002 Chevy s10 4.3L auto 4x4 1971 mercury monterey wagon 400 auto To many projects! |
10-30-2021, 01:18 PM | #5 |
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Join Date: Dec 2018
Location: yamhill OR
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Re: Random multiple cylinder misfire when wet/damp outside
So I swapped out the dis cap with an old one that came off my Dads van.
The truck ran better for a few days and then started doing pretty much the same thing as before. This being said, when the truck isn't jerking/misfiring it seems to run better with this cap then my other one, so pretty sure there's something wrong with my other cap maybe this one too. So anyway I went ahead and ordered new plugs,wires,cap and Rotor. should be hear within the coming week.
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1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601 1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037 1998 chevy c1500 4.3L 5speed (My current driver) 2002 Chevy s10 4.3L auto 4x4 1971 mercury monterey wagon 400 auto To many projects! |
10-30-2021, 08:13 PM | #6 |
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Re: Random multiple cylinder misfire when wet/damp outside
Did they do the same thing with the 4.3 that they did with the V8s and try to have conductors crisscross the cap so that spark plug wires all came off the cap on the same side of the engine where the plugs are? If so, those caps are really problematic for the V8s, and there is a thread on here somewhere for that.
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10-31-2021, 12:20 PM | #7 | |
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Re: Random multiple cylinder misfire when wet/damp outside
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Yeah I have read stores on this forum and others about these caps. Mostly quality issues From caps failing in short periods time to them being bad new out of the box.
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1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601 1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037 1998 chevy c1500 4.3L 5speed (My current driver) 2002 Chevy s10 4.3L auto 4x4 1971 mercury monterey wagon 400 auto To many projects! |
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11-03-2021, 12:40 AM | #8 |
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Join Date: Dec 2018
Location: yamhill OR
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Re: Random multiple cylinder misfire when wet/damp outside
Put on the new cap and rotor today. The truck is running way better.
I'll give it a few days of driving to work and back before I call it a for sure win.
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1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601 1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037 1998 chevy c1500 4.3L 5speed (My current driver) 2002 Chevy s10 4.3L auto 4x4 1971 mercury monterey wagon 400 auto To many projects! |
11-03-2021, 11:27 AM | #9 | |
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Re: Random multiple cylinder misfire when wet/damp outside
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