2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Ignition issue

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Old Nov 21, 2007 | 01:19 PM
  #1  
seventh_rx's Avatar
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Memento Mori
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From: Eastern WA
Ignition issue

I've searched and have not seen anything similar to my symptoms, so here we go:
(1991 with a J-SPEC TII swap/ N374 ECU/ NA wiring harness)

No spark from plugs when grounded to body.
I have checked the following:

-Coils (both L and T) have power
-CAS is wired correctly to ecu
-Relays click, so i am assuming they are fine since the coils have power.
-when it was cranking, the volt meter read 0.01v on the ecu output to the leading coil (haven't connected the oscilloscope yet, but will soon to get a better reading)
-coil wires are wired correctly to ecu

What else can I test? What other inputs does the ECU need to see in order to fire the coils?

I have been reading quite a bit that the N374 ECU is trash. Is it possible that I may need a N370?
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Old Nov 21, 2007 | 08:22 PM
  #2  
seventh_rx's Avatar
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Memento Mori
Tenured Member 10 Years
 
Joined: Aug 2005
Posts: 212
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From: Eastern WA
I failed to also mention that I have the Neutral switch disconnected(I think it connects to tranny somewhere) and also 2 wires that have same connector(barrel style) and are grounds.

I am doubtful, but would these affect it?
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