no spark

[XfireZ51]

That?s the ECM self test.

[spork2367]

After going through every diagnostic test in the manual and testing the continuity of every wire that is accessible, I was stumped.

Things that didn't fix it:

- Checked for blown fuses
- Checked for any stored codes
- Swapped the ECM
- Swapped CPS even though it tested good at the sensor and the DIS
- Swapped the DIS
- Installed new coils (was on the list anyway)
- Tested coil base
- Went through entire diagnostics checklist
- Checked all accessible wire continuities between CPS, DIS, Coils, ECM, Test Port and Fuse Panel

The only explanation was that power wasn't getting somewhere that needed power.

Bought a box of fuses. Pulled every single fuse and swapped them.

Starts and runs.

The car sat out last year under a cover for a month or two while I was moving some machines in my shop. When I uncovered it there was a decent amount of moisture in the car. Ran the AC for an hour or so, dried it out and called it good.

When looking at the fuses, several had some light white corrosion on the tips. My guess would be that one of them corroded just enough to lose contact. I'll never know which one because I was too impatient and swapped them all at once. I am going to test them all to see if I had a bad fuse that didn't appear blown.

Anyway, case closed.

[DRM500RUBYZR-1]

Spork,
Great Catch!!!

Desperate men do desperate things!
Glad you found the problem.

Not that you should change fuses again for nothing, but I found these, and WOW, does it ever save time when something goes wrong!

Fuses with LED indicators that light up when the fuse fails.

https://www.etrailer.com/Automotive-...ol/PT72FR.html

Again, good job!

Marty

[spork2367]

Originally Posted by DRM500RUBYZR-1

Spork,
Great Catch!!!

Desperate men do desperate things!
Glad you found the problem.

Not that you should change fuses again for nothing, but I found these, and WOW, does it ever save time when something goes wrong!

Fuses with LED indicators that light up when the fuse fails.

https://www.etrailer.com/Automotive-...ol/PT72FR.html

Again, good job!

Marty

Funny you thought of those. I saw them when I bought the fuse pack and seriously considered them. In this case, because there is a 50/50 chance power wasn't coming into the fuse, they might not have helped, but in general they would be nice. Saves the hassle of pulling a pile of fuses.