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1G Weird No Spark Issue Link G4x & COP

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Evo_This

Evo_This

15+ Year Contributor
321
2
Nov 11, 2007
Houston, Texas
Having an issue I can't track down, for some reason I randomly lost spark to the car. Here's the cliff notes of what I've done so far to solve it:

Spark plugs replaced
(COP system, no PTU) Coils replaced -
CAS replaced
MPI relay replaced
ECU replaced

MPI powers fuel pump (clicks on prime, clicks off at stop)
ECU fully boots up and can connect to it, CEL comes on/Boost gauge to zero
IGN, MPI, #19 fuses good
12v to each coil connector with key on

Power doesn't seem to be the issue but signal to fire is. If I take the CAS out and turn by hand the injectors fire so the CAS is working, what am I missing?
Car was idling for about 10mins, went to move the car and it stalled. Will not restart. Any assistance would be appreciated.
 
Last edited:
Solution
Evo_This
So after multiple test runs, some frustrating results, and one briefly shocking experience I have narrowed down all these symptoms to a broken-down solder joint on the ground wire to the cop harness. Going to clean and repair this weekend so hopefully see her fire back up.
Thank you @Tyeler18 & @Anfurnyy, I gained some knowledge and new a tool from your help.
Next is learning G4X, wasn't planning on using it yet but now that it's in I'm getting familiar with the software.
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Anfurnyy said:
I set configured mine all up with the inputs and outputs and what not. But I have a plug n play g4+. BUT mines got all sorts of extra stuff like drive by wire, kiggly 12-1 trigger wheel, evospec crank sensor, a clutch slipper. All sorts of stuff

I didn't tune my car though. I have dabbled in it a bit. Enough to get my car running and driving and light pulls.
Click to expand...
I ordered the knock sensor and the CAN WB controller. I want a digital dash, do you have one? I like the Powertune model.
 
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