This is topic No Spark? in forum Tech Talk at Northern California Ford Owners  .


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Posted by baggins (Member # 3957) on :
 
my 92 gt has no spark. the tfi module is good and so is the computer, they were both tested on another car. The + side of coil has 12v with key in on position. the wiring harness has been hidden under the fenders. the car currently turns over and the fuel pump will prime. any ideas as to why there would be no spark?
 
Posted by 84GT5.0 (Member # 5227) on :
 
are you getting current from the coil to the distributor, if you have power to the coil, but none the the distributor, then id try a different coil

[ January 26, 2006, 10:53 PM: Message edited by: 84GT5.0 ]
 
Posted by two-gun kid (Member # 5891) on :
 
quote:
Originally posted by baggins:
my 92 gt has no spark. the tfi module is good and so is the computer, they were both tested on another car. The + side of coil has 12v with key in on position. the wiring harness has been hidden under the fenders. the car currently turns over and the fuel pump will prime. any ideas as to why there would be no spark?
i got a coil stock coil for $10 obo +shipping
 
Posted by asskickn88 (Member # 4957) on :
 
He forgot to mention that we did that. I was helping him but didnt have a lot of time. The car was running fine. The harness was pulled back and rerouted through the fender and all the holes were welded up in the engine bay. the guy that did the work has done a few of these and hasnt had any problems. We pulled the ignition module and computer and they ran in my car fine. Also swapped in another coil, no change.
 
Posted by 84GT5.0 (Member # 5227) on :
 
did you try replacing the coil to distributor wire??? if not then id say its the wiring, or the distributor
 
Posted by asskickn88 (Member # 4957) on :
 
He said the dist was just in a friends car and running ok. I guess we need to track through the harness to find where the problem is. I was guessing that because the engine bay was welded on, the current could have fried the computer or module but that wasnt it.
 
Posted by 84GT5.0 (Member # 5227) on :
 
quote:
Originally posted by asskickn88:
He said the dist was just in a friends car and running ok. I guess we need to track through the harness to find where the problem is. I was guessing that because the engine bay was welded on, the current could have fried the computer or module but that wasnt it.
did you try a new coil to dist wire? also the welding could have melted wiring on the other side of the metal . but if you have current at the coil it can only be a couple of things
 
Posted by JohnB (Member # 969) on :
 
Check all the grounds that were re-done when the wiring was routed.
 
Posted by Jmir018 (Member # 1414) on :
 
what jonhb said..
also, i know you said you checked the tfi, but.. did you replace the whole dist recently?
Something similar happened to me. i replaced my stock dist with a brand new msd unit. and stopped getting spark. changed the tfi module for the stock one and nada. changed coil.. wires, not believing it could be a brand new dist cuasing the problem, with no success. eventually.. took the whole unit out. replaced it with the stock one and the car started right up.
Good luck.
 
Posted by baggins (Member # 3957) on :
 
distributor came out of a running car. i am going to go through and recheck the main engine harness. if that is not it i have no idea what it could be.
 
Posted by 94gt (Member # 3060) on :
 
I hope that when he added wire, that he soldered it on and didnt splice it on.
 
Posted by baggins (Member # 3957) on :
 
would that make such a difference that it wouldnt spark? butt connectors reallly dont have that much resistance. plus there was only like to splice necessary
 
Posted by asskickn88 (Member # 4957) on :
 
quote:
Originally posted by baggins:
would that make such a difference that it wouldnt spark? butt connectors reallly dont have that much resistance. plus there was only like to splice necessary
It wouldnt make much difference at first but over time they would corrode. You can use RTV gasket maker and seal around the wire on both ends to take car of the problem though.
 
Posted by baggins (Member # 3957) on :
 
OK i have looked over my harness a thousand times now and i still cant find any loose wires. what the hell could this be?
 
Posted by Rob [5LVENOM] (Member # 2282) on :
 
Are you 180 out maybe?
 
Posted by baggins (Member # 3957) on :
 
i dont think i am. and even if i was i dont think that would cause NO spark. or would it?
 
Posted by asskickn88 (Member # 4957) on :
 
No, the timing would just be off.
 
Posted by 04Z06 (Member # 2309) on :
 
Make sure the TFI is not loose. If it is not tight it will give you this situation. Make sure it is not pressing up against the engine. I learned this one the hard way.

What was done to the car before this happened?

E
 




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