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.
Thursday, September 27th, 2018 AT 5:27 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,480 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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