rx7_re

Ug, I remember there is a way to see if the ECU is fried. You grab the pressure sensor wires (The ones on the pass. shock tower). You have to test one of the wires in there, I forget which one though. But anyways you test if and it should have 5V on it, if it doesn';t your ECU is toast. Give me a minute to find out which wire it is.

1Revvin7

That could just mean your ecu has no power. Test to see if any of the wires going to the ecu are hot while you are at it. If they are at the pressure sensor is not, then its fried.

annuerysm

I had already checked that wire on the pressure sensor and it checked out. Is there a good way to check if the leading ignitor trigger wire (the green/yellow striped one) is carrying a signal?

1Revvin7

Why did this start happening in the 1st place? Do you have x15/16 connectors plugged in? They are up in the corner near the ecu but not plugging into the ecu...

Cosmo Donk

Well, if my method of triggering it with ground makes it spark the trigger wire should be a pull to ground. If that is correct you should be able to do a continuity check when cranking from the trigger wire to ground. It should beep (continuity) when the signal goes through.



BTW. Did you try my test? - EDIT - I see you did but the coils seemed dead. Have you tried any other coils? - EDIT - Never mind

annuerysm

1Revvin7: This is happening because I bought the car and it never ran so I rebuilt the motor. I'll check the X15/16 connector sounds promising.



Cosmo Donk: are you sure grounding out the ignitor wire is what triggers the coil? I think the ECU sends 5volts to trip the ignitor based off the CAS signal. Please someone correct me if this is incorrect.

rx7_re

I am just curious, are you getting any spark at the trailing coils?

annuerysm

No spark on leading or trailing

rx7_re

Well, if your sure absolutely everything is connected, I want to say your ECU is fried. I never really hear about coils just crapping out, let alone both of them at the same time.

annuerysm

I regrounded the ECU really well and even though my battery now has barely enough power to spin the motor I saw a tiny spark this time. I'm pretty sure it was the ECU not having a good ground.