FE misfire
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More Turbo
Joined: Jun 2020
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FE misfire
I have a small misfire, I was putting on new plug wires until I realized I had the wrong ones, so off come the new and back on for the old.
I have a small misfire on one cylinder, I can hear a small pop occasionally in the engine bay, abd can hear it in the exhaust, and when driving. I also tried pulling a wire off the cap, don’t remember which one it was. But it sure shocked me, is that normal?
please educate me on how to rout plug wires and check for arcing
I have a small misfire on one cylinder, I can hear a small pop occasionally in the engine bay, abd can hear it in the exhaust, and when driving. I also tried pulling a wire off the cap, don’t remember which one it was. But it sure shocked me, is that normal?
please educate me on how to rout plug wires and check for arcing
Tuned
Joined: Mar 2011
Posts: 361
Likes: 7
From: Bliss NY
Getting zapped is normal and a lesson some how gets repeated. To check for arching look under the hood in the dark. Routing wires, keep them seperate by firing order. #7 and #8 are good example try putting #6 wire tween them. You're misfire could be damaged wire or just arching. Hope that helps.
Post Fiend
Joined: Apr 2002
Posts: 19,311
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From: Waterloo, Iowa
Check that the plug wires are in the correct firing order, just to be sure. Could use one the new wires, the longest, as a sub for each cylinder for test purposes to rule out a bum wire maybe. A dark garage at night would show any arcing at idle. Does the engine retain the original contact point distributor? Try a known good ignition condenser just for grins.
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Just went out and checked since it’s dark out now. There were a few arcs to the filter and valve cover here and there, so I definitely need new wires, and a new coil wire for sure that had the biggest arc, however it was very faint arcs, nonetheless. I went back over all the wire order as well and it was correct. Next I’ll throw in another condenser and see if it changes anything.
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From: Northern Texas
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It’s at the very rear of the truck, tailpipe exit, up at the engine you can’t hear it. Thought it would be a misfire since it started right after the plug wires were changed, and you can hear while driving and feel, just not smooth as it was before I changed wires
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Yeah I’m going to take them all off tomorrow and start fresh. Someone said earlier not to cross certain wires, can someone elaborate on that? Which ones not to cross and how I should route then wires?
Post Fiend
Joined: Apr 2002
Posts: 19,311
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From: Waterloo, Iowa
I don't know if modern plug wires are as susceptible to that, the insulation or conductor material is a lot better/different than way back when, maybe. It was longer runs in parallel that can cause problems by inducing the adjacent wire to fire simultaneously too.
Don't have to start fresh. Here's one way. Locate the #1 cylinder in the firing order on the distributor cap and pull that wire and the #1 cylinder spark plug wire boot too. Check for the "beep" with the continuity setting and probes on your meter. Re-install both. Then continue on and do the same in turn for each cylinder in firing order. Henry specified 15486372, but, I am to understand there are (apparently) some engines out there that are different.
Don't have to start fresh. Here's one way. Locate the #1 cylinder in the firing order on the distributor cap and pull that wire and the #1 cylinder spark plug wire boot too. Check for the "beep" with the continuity setting and probes on your meter. Re-install both. Then continue on and do the same in turn for each cylinder in firing order. Henry specified 15486372, but, I am to understand there are (apparently) some engines out there that are different.
Logistics Pro
Joined: Mar 2005
Posts: 3,771
Likes: 80
From: tujunga, calif
I don't know if modern plug wires are as susceptible to that, the insulation or conductor material is a lot better than way back when, maybe. It was longer runs in parallel that cause problems by inducing the adjacent wire to fire simultaneously too.
Don't have to start fresh. Here's one way. Locate the #1 cylinder in the firing order on the distributor cap and pull that wire, and the #1 cylinder spark plug wire boot and pull that too. Check for the "beep" with the continuity setting and probes on your meter. Re-install both. Then continue on and do the same for each cylinder in firing order. Henry specified 15486372, but, I understand there are (apparently) some engines that are different.
Don't have to start fresh. Here's one way. Locate the #1 cylinder in the firing order on the distributor cap and pull that wire, and the #1 cylinder spark plug wire boot and pull that too. Check for the "beep" with the continuity setting and probes on your meter. Re-install both. Then continue on and do the same for each cylinder in firing order. Henry specified 15486372, but, I understand there are (apparently) some engines that are different.
Cargo Master
Joined: Sep 2005
Posts: 2,954
Likes: 64
I don't know if modern plug wires are as susceptible to that, the insulation or conductor material is a lot better/different than way back when, maybe. It was longer runs in parallel that can cause problems by inducing the adjacent wire to fire simultaneously too.
Don't have to start fresh. Here's one way. Locate the #1 cylinder in the firing order on the distributor cap and pull that wire and the #1 cylinder spark plug wire boot too. Check for the "beep" with the continuity setting and probes on your meter. Re-install both. Then continue on and do the same in turn for each cylinder in firing order. Henry specified 15486372, but, I am to understand there are (apparently) some engines out there that are different.
Don't have to start fresh. Here's one way. Locate the #1 cylinder in the firing order on the distributor cap and pull that wire and the #1 cylinder spark plug wire boot too. Check for the "beep" with the continuity setting and probes on your meter. Re-install both. Then continue on and do the same in turn for each cylinder in firing order. Henry specified 15486372, but, I am to understand there are (apparently) some engines out there that are different.