Could this cause a missfire?
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Re: Could this cause a missfire? (Pacin'California)
Oh yeah, that would cause a misfire. The first time I took my girlfriend out in my 79, by the time we got to where we were going I had a misfire. When we arrived I raised the hood with the motor running and could see the wire arcing to the exhaust manifold. I just pulled the wire away and tied it back until I could get the car back home to fix it. Pretty embarassing to me but she never knew what was going on.
Thread Starter
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
Re: Could this cause a missfire? (Eddie 70)
Running without a wire is ok?
I'm gonna head over to the parts store and pick up a box of cheapos until I can afford good looms.
I'm gonna head over to the parts store and pick up a box of cheapos until I can afford good looms.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Re: Could this cause a missfire? (Pacin'California)
Yes that burn spot on the boot will cause a misfire. :yesnod: I have proved this myself. I recommend some boot/wire protectors and I bought mine from summit for <$50 (they look like a sock but u can buy them in different collors to match your wires).
It's my personal opinion but I think any good 7.5 or 8mm silicone wires with wire wound spiral core will do a fine job. I just don't think the expensive name brand stuff is worth the difference in price. ;)
It's my personal opinion but I think any good 7.5 or 8mm silicone wires with wire wound spiral core will do a fine job. I just don't think the expensive name brand stuff is worth the difference in price. ;)
Melting Slicks
Joined: Apr 2000
Posts: 3,286
Likes: 8
From: San Jose California
Re: Could this cause a missfire? (Pacin'California)
Steve,
Absolutely! Was doing a check of my plug wires tonight too. My number one plug was very gas fouled. I measured the exhaust temp about 1 inch below the flange on each of the primary header pipes while idling at a somewhat fast 3000rpm. My #1 was 580 degrees F, the others were about 890-950 degrees F. I put this plug wire on my ohm meter and found a measure of 1.948 compared to a measure of only .125 with the old MSD wires. Touching the connecters together makes a measurement of .000. My current wires are Jacobs ceramic wires guaranteed for life. I think I need a replacement.
Chuck
Absolutely! Was doing a check of my plug wires tonight too. My number one plug was very gas fouled. I measured the exhaust temp about 1 inch below the flange on each of the primary header pipes while idling at a somewhat fast 3000rpm. My #1 was 580 degrees F, the others were about 890-950 degrees F. I put this plug wire on my ohm meter and found a measure of 1.948 compared to a measure of only .125 with the old MSD wires. Touching the connecters together makes a measurement of .000. My current wires are Jacobs ceramic wires guaranteed for life. I think I need a replacement.
Chuck
Pro
Joined: Dec 2002
Posts: 560
Likes: 1
From: Mooresville NC
Re: Could this cause a missfire? (Chuck Harmon)
For anyone wants a cheap trick, I usually found my wire short by using a mirror at night and look for the arcs. Hard to see during the day time but at night it's very clear where your problem is. Another tip is to use a timing light to check each each wire. The one that doesn't have a steady pulse could either be a cap, wire or plug problem.
