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Electrical Cranks but no spark

  • Thread starter Thread starter evensteven
  • Start date Start date Jun 19, 2020
E

evensteven

Member
May 14, 2009
3
2
13
Jun 19, 2020
#1
  • Jun 19, 2020
  • #1
Hi- This is Steve, I haven't been on in a while but I'm in need of help. I've got an 89 5.0 EFI engine in my 65 coupe. Its been on the road with this set up for 4 years and I've got almost 10k miles logged. Recently I've run into an issue where the car will crank but not start. There is NO spark at the coil. The coil wires show 12 volts in the run position. All the ground are cleaned and secure. I've replaced the TFI module, the PIP and the coil. The coil will show spark if the Spout connector is removed. But it will not run. There is also 12 volts at the injectors and I can hear the relay for the fuel pump turning on. I've confirmed that I have fuel. Just no spark. Any thoughts? I've gone through the crank but won't start checklist and I'm stumped.



Thanks
 

Olivethefet

I will own your nuts! LOL
5 Year Member
May 17, 2018
2,596
1,790
143
Enterprise AL
Jun 19, 2020
#2
  • Jun 19, 2020
  • #2
How old is the cap and rotor? Is the computer throwing codes? That's about all I've got.
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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polk county florida
Jun 19, 2020
#3
  • Jun 19, 2020
  • #3
Go back to the list, you have missed something like a fuseable link
 
E

evensteven

Member
May 14, 2009
3
2
13
Jun 19, 2020
#4
  • Jun 19, 2020
  • #4
After all the checklist items I decided to try another ECU. My cousin brought his over and we plugged it in. The car fired right off and idled for several minutes before I turned it off. I put my computer back in, and it would not start. Guess its time to replace the ECU.
Thanks
 
Reactions: Olivethefet and General karthief
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Kram_SVO

New Member
Sep 18, 2021
3
0
1
Alpharetta, GA
Sep 20, 2021
#5
  • Sep 20, 2021
  • #5
Hi I've got an 86 svo and have the same issue, drove up the road and it just died, pushed it home and have no spark but power to the coil. Wiring confuses me with cars so i don't know if the fuse links are bad or TFI, I was looking at the fuse links and attached to them was a large white plug and 2 other small white plugs that were not being used, anyone know what they are for? also how would I replace a fuse link? cut and add a regular fuse? ( im not sure if the photos will send but one of the fuse links with 4 black wires is kind of round and the rest are square, don't know if that's a bad one or not)
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,902
10,555
203
polk county florida
Sep 20, 2021
#6
  • Sep 20, 2021
  • #6
Kram_SVO said:
Hi I've got an 86 svo and have the same issue, drove up the road and it just died, pushed it home and have no spark but power to the coil. Wiring confuses me with cars so i don't know if the fuse links are bad or TFI, I was looking at the fuse links and attached to them was a large white plug and 2 other small white plugs that were not being used, anyone know what they are for? also how would I replace a fuse link? cut and add a regular fuse? ( im not sure if the photos will send but one of the fuse links with 4 black wires is kind of round and the rest are square, don't know if that's a bad one or not)
Click to expand...
A V8 car is almost totally different than the turbo 4 cylinder cars.
 
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