Power FC No spark with PFC no start. stock ecu fires up
No spark with PFC no start. stock ecu fires up
Hi guys need some input.
I recently pulled my motor to change the clutch, paint bay and do some other little mods. I have aem coils with the sake bomb coil harness. Thinking I got the harness put together Ok I went to start the car.
It cranked a few times and just stopped. I though the neutral safely switch crapped out because it was giving those symptoms. I bypassed that sensor but that wasn’t the problem. My dumb *** hooked up the power and ground wrong on that harness.
ended up being the connections on the starter. Took it off gave it good cleaning and now the starter works. So, go to crank and now no combustion. I figured it flooded went through that whole procedure. Still wasn’t the problem/fix.
I swapped out the PFC for the stock ECU. Boom I have spark and the car turns over.
Im kinda in a time crunch for SEMA so I ordered a new PFC since apexi would have to send the ecu to japan for testing. Got the new PFC yesterday and the car doesn’t start gives the same symptoms at the old PFC.
It has to be wiring or a ground or a failed relay?
What would allow the stock ecu to send the spark Signal and not the PFC?
thanks
I recently pulled my motor to change the clutch, paint bay and do some other little mods. I have aem coils with the sake bomb coil harness. Thinking I got the harness put together Ok I went to start the car.
It cranked a few times and just stopped. I though the neutral safely switch crapped out because it was giving those symptoms. I bypassed that sensor but that wasn’t the problem. My dumb *** hooked up the power and ground wrong on that harness.
ended up being the connections on the starter. Took it off gave it good cleaning and now the starter works. So, go to crank and now no combustion. I figured it flooded went through that whole procedure. Still wasn’t the problem/fix.
I swapped out the PFC for the stock ECU. Boom I have spark and the car turns over.
Im kinda in a time crunch for SEMA so I ordered a new PFC since apexi would have to send the ecu to japan for testing. Got the new PFC yesterday and the car doesn’t start gives the same symptoms at the old PFC.
It has to be wiring or a ground or a failed relay?
What would allow the stock ecu to send the spark Signal and not the PFC?
thanks
Last edited by on3lv3; Oct 7, 2018 at 12:06 PM.
So Just an update. Checked all the grounds, All Good. Wiring all good. Checked the PFC with another car, started right up.
Here is the kicker. Had my dash all torn apart. Plugged my gauge cluster back in, boom started right up.
Here is the kicker. Had my dash all torn apart. Plugged my gauge cluster back in, boom started right up.
Dumb question but when you pulled pins out of the harness for the PFC did you happen to do it with a weed whacker and chop some other wires by accident? 
Just kidding, though I have seen PFCs act similarly to what you're describing and the stock ECU working passably when I've seen a couple hack jobs. It doesn't usually present this way but I have seen it a couple of times.
Just kidding, though I have seen PFCs act similarly to what you're describing and the stock ECU working passably when I've seen a couple hack jobs. It doesn't usually present this way but I have seen it a couple of times.
Dumb question but when you pulled pins out of the harness for the PFC did you happen to do it with a weed whacker and chop some other wires by accident? Just kidding, though I have seen PFCs act similarly to what you're describing and the stock ECU working passably when I've seen a couple hack jobs. It doesn't usually present this way but I have seen it a couple of times.
Just kidding, though I have seen PFCs act similarly to what you're describing and the stock ECU working passably when I've seen a couple hack jobs. It doesn't usually present this way but I have seen it a couple of times.Trending Topics
I'm not familiar with RyWire harnesses as I've always built my own. I'd confirm that its been de-pinned, the proper pins to remove and the procedure to do it is pretty straightforward and in the PFC forum.
Thread
Thread Starter
Forum
Replies
Last Post
Turtle13
2nd Generation Specific (1986-1992)
24
Jan 29, 2013 09:24 AM
carl_9_9
2nd Generation Specific (1986-1992)
8
Sep 12, 2008 06:07 PM
EKTwin93
3rd Generation Specific (1993-2002)
5
Nov 14, 2006 04:55 PM
scott(pittsburgh)
Power FC Forum
1
May 20, 2002 08:17 AM
