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Pulled the truck into the garage to replace some lights. When I tried to start it the WTS light was flashing and the truck would only crank and not fire. I tried pulling codes and got nothing. I disconnected the batteries for a few minutes and nothing changed. I unplugged the Quadzilla and the WTS light functioned as normal. The truck started right up but instantly idled at 1200rpm and then went into 3cyl idle mode. I checked my idle control switch and it’s in the off position. My throttle is also unresponsive(Timbo). Thanks to my low stall converter I was able to get the truck out of the garage and back into its parking spot. When I parked it the idle dropped to 900rpm and still no response from pedal. I assume I need to do an apps reset due to disconnecting the batteries. Could the quad really be the cause of all this? I plan on doing the reset tomorrow and completely unplug the quad just to see if it runs stock.

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Don't have any answers, just waiting to see what the APPS reset offers.

It will be interesting to see if the Quadzilla is the culprit.

  • John

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I went out and completely disconnected the Quad, and did the apps reset. Truck is back to flashing WTS light even with no Quad and still does the crank no fire. I feel as though I’m looking at an ECM rebuild? I did check the little bit of live data I get with my scanner and it showed TPS at 93% while not running obviously.

Edited by Sycostang67

I have not experienced your situation, but from what I have read from related past postings on this site, you are in need of a rebuilt ECM. The ECM basically will not boot up, or won't finish booting up, so no engine start.

  • John

Edited by Tractorman

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The ECM is the computer bolted to the driver side of the block, correct?

  • Staff

YES, go to the Vendor Directory here on the site and find Auto Computer Specialist. They have a good reputation with good results.


  • Author

Ok, I found the ACS website and should get the ecm pulled today and hopefully in the mail tomorrow.

  • Author

Pulled the computer and realized I forgot to get the mileage from the dash. Would it be safe to hook the batteries back up and to get the mileage without the computer installed?