No spark

1999 TOYOTA 4RUNNER

200,000 MILES • 3.4L • V6 • 2WD • AUTOMATIC

NORUN4RUNNER

MEMBER
1 POST

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.

Sep 26, 2018 at 10:27 PM

STRAILER

✓Experienced Mechanic
55,214 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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Professional Diagram for 2CarPros Members
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Sep 29, 2018 at 4:53 AM