no spark
Thread Starter
|
Tuned
Joined: Mar 2004
Posts: 400
Likes: 2
From: South Texas
no spark
While driving a couple of days ago my '93 Bronco's 5.8 stopped running suddenly. It would crank over ok but didn't have any spark coming out of the coil. I pulled it home and when I got there, it started right up only to leave me stranded by dying out while driving home from the bar at 2AM. I replaced the cap and rotor yesterday along with the ignition control module and it ran fine last night and all day today. I had the module tested at two different Oreilly stores and one says its good the other says bad. I parked it about an hour ago and now it is doing it again. It started up for about thirty seconds before quitting again. Any suggestions? Thanks.
Elder User
Joined: Jul 2004
Posts: 811
Likes: 0
That sounds like the ignition control box going bad. Heat makes them cut out then the're fine after they cool. Had it happen several times on my 85. After going through a 2 boxes in 2 years I finally switched to a MSD 6-A ignition. Then I added a switch so I can select between the two, MSD or Ford for a backup. Never left me stranded again.
Elder User
Joined: Apr 2003
Posts: 627
Likes: 1
it's your module or your coil, commonly coils test fine when cool and fail when hot, I wouldn't spend the money on a MSD when a few bucks will fix yours, first repalce the module and carry a spare coil and if it happens again change the coil.
Thread Starter
|
Tuned
Joined: Mar 2004
Posts: 400
Likes: 2
From: South Texas
I don't think it is the coil or a problem when it warms up. I pulled the coil of my '88 bronco that was sitting for a couple of days so I know both were cold. I tested it for fire and it was good. I swapped it into the 93 and it showed no fire. The truck has done this a cople of times while driving and once after parking it and coming back a couple of hours later to find it not starting again.
New User
Joined: Apr 2004
Posts: 13
Likes: 0
My girlfriends Jetta did the same thing two weeks ago ( except the stranding on the way home from the bar part ). It had no spark off the coil but I was sure it was the ignition module. It wasn't, it was the coil. Just take a ohm meter and measure resistance across the Pos and Neg terminals, you can get the specs out of a haynes or chiltons manual, mine is at home so I can't help you with it now. Anyway, mine was fluttering and it should have been steady. You can also test across the negative and the tower connection. Luckily for me Pep Boys took the module back and I got my 91.00 bucks back
Thread
Thread Starter
Forum
Replies
Last Post
ymirr
1973 - 1979 F-100 & Larger F-Series Trucks
8
Apr 6, 2017 07:42 PM
exidor12
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
5
Sep 13, 2015 06:34 AM
smalexander85
1973 - 1979 F-100 & Larger F-Series Trucks
8
Apr 14, 2013 11:56 AM
Narked
Electrical Systems/Wiring
2
Sep 23, 2011 02:09 AM
