1988 Mustang 5.0 HO, no spark - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 04-14-2007 Thread Starter
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1988 Mustang 5.0 HO, no spark

Hey guys, new to the forum. Just picked up a 88 5.0 that the owner couldn't get running.

The car has no spark from the coil. I have power to the coil, I had the ignition module checked and it is supposedly good, I swapped the coil with a known good one, still no luck. I did a search on here and read some posts and I'm leaning towards the pickup coil in the distributor being bad, but before I tear the distributor apart I was wondering if there is anything else simple I should check like relays or fusible links? This is my first Mustang so I'm not real familiar with them, is there somewhere online where I can find a good wiring schematic?

Thanks for any help, hopefully after I get this thing runnin I can start the performance mods, I think it going to be a fun car.
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post #2 of 9 (permalink) Old 04-14-2007 Thread Starter
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Update, changed the pickup coil in the distributor and no change.

so far eliminated..

coil, ignition module, pickup coil

When I'm rolling the motor there is absolutely no spark, but when I let of the starter it sparks one time, any ideas would be greatly appreciated, thanks.
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post #3 of 9 (permalink) Old 04-14-2007
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Maybe you should replace the tfi module just to be sure it is good, also check the wires that go to the tfi. Make sure that they are all still intact and not broken. A long shot but maybe the connectors for the wires into the tfi are loose. As far as a spark occuring when you let off the starter I have never experienced this and don't know if it holds any clue to the problem.
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post #4 of 9 (permalink) Old 04-14-2007
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Quote:
Originally Posted by MasterOfFaster View Post

When I'm rolling the motor there is absolutely no spark, but when I let of the starter it sparks one time, any ideas would be greatly appreciated, thanks.
That almost sounds like the ignition switch.
I'd try rigging up a remote switch for the starter, which reaches into the car from the solenoid. Then I'd jiggle the key(in the "run" position) as I cranked the starter.
Also, you might remove the cover on the steering column, and inspect the wiring where it plugs into the switch.

'88 GT convertible, 5 speed, 3:08 gears, A9L Mass Air conversion. Mac shorty headers and H-pipe, Magnaflow catback.
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post #5 of 9 (permalink) Old 04-14-2007
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same thing happened to me it was the tfi module check it but it might be something different??

12:1 compression 347 stroker fully forged internals, Victor Sr 5.0 EFI Intakes, holley 83mm throttle body, prom 83 mm mass air, 30# injectors, holleyfuel pressure regulator,BBK 1 5/8 Longtube headers,bbk offroad X-pipe, 3 inch MAC Catback,Port and Polished Pro-TopLine Aluminum heads with double spring upgrade,Lunati Cam with 1.7 Ford Racing roller rockers,3:73's,8 point Cage,And new to the family 75 shot Zex Kit
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post #6 of 9 (permalink) Old 04-14-2007
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i would change the modual. happened to me and thats what it was.

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post #7 of 9 (permalink) Old 04-15-2007 Thread Starter
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I got it running today, turned out to be a bad connection at the computer, it had an aftermarket chip installed. Took it apart, cleaned the connections and viola. I wish it was that easy all the time, thanks for all the suggestions.
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post #8 of 9 (permalink) Old 04-16-2007
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Easy and cheap. Congratulations.

'88 GT convertible, 5 speed, 3:08 gears, A9L Mass Air conversion. Mac shorty headers and H-pipe, Magnaflow catback.
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post #9 of 9 (permalink) Old 07-17-2010
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I just picked up a 88 gt and I am having the same exact problem. I replaced the ignition coil, nothing, replaced the tfi module nothing. I was originially getting power to the coil, but now I am not. All of the fuses are good. I tried to jump the solenoid with the key on and still nothing. Could it be a bad distributor? Im not exactly sure how this works but does the tfi module send a signal light to the ignition coil and thats what signals the spark to go from the coil to the distributor? So if the distributor was bad then that would explain why their is no power getting to the ignition coil? Im not too sure on this so if someone with some more experience could let me know, that would be great. Also I tried to put a jumper wire from the battery to the ignition coil and still got nothing. Thanks
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