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 Sep 1 2008, 01:12 PM
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 Bronco Mechanic  Group: Members Posts: 50 Joined: 1-May 07 From: plymouth, MN Member No.: 7,742  |
My bronco has been sitting for most of the summer with occasional use on the weekends only. One weekend, I tried to start it and it just wouldn't fire. After a while I tested the spark, and there was none. The distributor and coil were only a few months old and have been working great. Since the problem started I have replaced the voltage regulator, ignition module and the starter, I have tested all of the wiring to the coil and made sure that power is getting to the ignition module. When I was testing voltage to the ignition module, I got 12V when the key was turned to "on", but when I started cranking, the voltage dropped to 0.4V, which is obviously not enough to make a spark. The only possible candidates left are a bad ignition switch, or some other system is tied into the ignition and is sucking all the voltage. Other than that I have no idea what the problem is and am running out of patience.
thanks This post has been edited by Red Green Jr: Sep 1 2008, 01:17 PM -------------------- 1978 bronco ranger xlt
351M, edelbrock performer intake and 600cfm performer carb newly rebuilt C6, np205 ford 9in rear diff with 31in mud terrains http://broncograveyard.com/readers/r-3014_...ord_Bronco.html |
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Sep 1 2008, 07:37 PM
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 Supreme Commander Group: Moderators Posts: 4,882 Joined: 22-May 04 From: North of NYC Member No.: 889 |
What ignition system do you have installed in it? Is it a Duraspark II? If that is the case then the pickup coil inside the distributor is bad. If it is a Duraspark II then I can upload you a diagram and troubleshooting procedure.
Good luck,  >- -------------------- Fred
Parts replacement is not trouble shooting, replacement follows trouble shooting Broncos are MPVs not SUVs Communication: I know you think you know what I said, but what you need to know is, I didn't say what I meant. Some of my pictures at Supermotors http://www.supermotors.net/212 1983 Full Size Bronco with; Ford 8.8" 3.08:1 Rear; Dana 44 3.08:1 Front; WARN Premium locking hubs; 31x10.5's; NP208; Holley 4160 4bbl; MSD 6AL Ignition; MSD Blaster 2 coil; 1978 Saginaw Pump V-Belt Power Steering; 1984 F150 Dash; 1985 351W HO; 1985 Tilt steering wheel; 1993 Mercury Sable 3G 130 Amp Alternator; 1995 F150 doors; 1995 20 inches of rear portion of the tub; 1996 Bronco tail gate; 1996 Eddie Bower Over Head Console; 1996 Lincoln Mark VIII 4200 CFM Electric Fan; Headlight harness upgrade; DRLs; Battery relocated to rear; Under hood fuse box vs fusible links; Upgraded wiring for rear window to 10 AWG; Always under restoration |
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Sep 2 2008, 12:35 PM
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#3
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Bronco Mechanic Group: Members Posts: 50 Joined: 1-May 07 From: plymouth, MN Member No.: 7,742 |
Its a duraspark, I have no idea if its a duraspark II or what. Is there a difference?
-------------------- 1978 bronco ranger xlt
351M, edelbrock performer intake and 600cfm performer carb newly rebuilt C6, np205 ford 9in rear diff with 31in mud terrains http://broncograveyard.com/readers/r-3014_...ord_Bronco.html |
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Sep 3 2008, 03:16 AM
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Supreme Commander Group: Moderators Posts: 4,882 Joined: 22-May 04 From: North of NYC Member No.: 889 |
It probably is. Here are the diagrams and proceedure.
>-
Attached thumbnail(s)
-------------------- Fred
Parts replacement is not trouble shooting, replacement follows trouble shooting Broncos are MPVs not SUVs Communication: I know you think you know what I said, but what you need to know is, I didn't say what I meant. Some of my pictures at Supermotors http://www.supermotors.net/212 1983 Full Size Bronco with; Ford 8.8" 3.08:1 Rear; Dana 44 3.08:1 Front; WARN Premium locking hubs; 31x10.5's; NP208; Holley 4160 4bbl; MSD 6AL Ignition; MSD Blaster 2 coil; 1978 Saginaw Pump V-Belt Power Steering; 1984 F150 Dash; 1985 351W HO; 1985 Tilt steering wheel; 1993 Mercury Sable 3G 130 Amp Alternator; 1995 F150 doors; 1995 20 inches of rear portion of the tub; 1996 Bronco tail gate; 1996 Eddie Bower Over Head Console; 1996 Lincoln Mark VIII 4200 CFM Electric Fan; Headlight harness upgrade; DRLs; Battery relocated to rear; Under hood fuse box vs fusible links; Upgraded wiring for rear window to 10 AWG; Always under restoration |
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Sep 4 2008, 09:10 AM
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#5
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Bronco Mechanic Group: Members Posts: 50 Joined: 1-May 07 From: plymouth, MN Member No.: 7,742 |
Thanks a lot!
This post has been edited by Red Green Jr: Sep 7 2008, 05:18 PM -------------------- 1978 bronco ranger xlt
351M, edelbrock performer intake and 600cfm performer carb newly rebuilt C6, np205 ford 9in rear diff with 31in mud terrains http://broncograveyard.com/readers/r-3014_...ord_Bronco.html |
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Sep 7 2008, 05:36 PM
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#6
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Bronco Mechanic Group: Members Posts: 50 Joined: 1-May 07 From: plymouth, MN Member No.: 7,742 |
After more work, i still have not solved the problem. I had a few possible solutions, but none of them worked. I replaced the ignition switch too. Just this weekend, one of the wires popped out of the pigtail leading from the ignition module. I am getting a new pigtail and hoping that that was the problem. I had tested continuity in the wires before and it looked good, but old, corroded wires can be very flaky. Any more info would be greatly appreciated. thanks
-------------------- 1978 bronco ranger xlt
351M, edelbrock performer intake and 600cfm performer carb newly rebuilt C6, np205 ford 9in rear diff with 31in mud terrains http://broncograveyard.com/readers/r-3014_...ord_Bronco.html |
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Sep 17 2008, 01:05 PM
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#7
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Bronco Mechanic Group: Members Posts: 50 Joined: 1-May 07 From: plymouth, MN Member No.: 7,742 |
she lives!!! turns out it was the pigtail leading from the ignition module to the coil. i had checked it before and it passed but i guess it disconnected when i plugged it back in. so thats $83 of replacing working components and an $8 fix, aint life grand.
-------------------- 1978 bronco ranger xlt
351M, edelbrock performer intake and 600cfm performer carb newly rebuilt C6, np205 ford 9in rear diff with 31in mud terrains http://broncograveyard.com/readers/r-3014_...ord_Bronco.html |
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