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No spark

Tiny
NORUN4RUNNER
  • MEMBER
  • 1999 TOYOTA 4RUNNER
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Replaced RCU with an ECU that has been flashed so that the transponder is disabled and the center ECU plug is not plugged in. I have replaced coils, wires, plugs, igniter and crankshaft positioning sensor still no spark. Checked with test light and everything gets power but no spark past coil.
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Thursday, September 27th, 2018 AT 5:27 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
These cars had a problem with the ignition ignitor but to be sure lets check for power and ground for the PCM. Here is a guide to help you confirm the issue and the engine wiring diagrams so you can see how the system works:

https://www.2carpros.com/articles/how-to-check-wiring

If everything looks good I would replace the igniter.

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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Saturday, September 29th, 2018 AT 11:53 AM

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