Quinnj

Hello all,

This is a special situation and Im trying to broaden my help through different forums.

Truck specs:
1990 4runner chassis
2000 3.4L 5vz Taco engine
2000 3.4L Tundra Manual 4x2 ECM (OEM#896610C010)
TRD Supercharger
URD 7th injector kit (IK22 plugs .043 gap, and Walbro fuel pump)
Prosport gauges: boost, EGT, wideband, fuel, and oil pressure

The truck ran fine with the 3.4 S/C engine, I drove it back from Oregon with no problems about 1500 miles in November 2017. Jump forward to now, I finally had money to buy the 7th injector kit. The install was easy, followed the instructions to the T.

I test drove it for about 100 miles around town no problems. Yesterday, I went snowboarding about 100 miles away from home, made it there with no problems all the gauges were reading good. At the end of the day, after driving 1/4 mile the truck suddenly died. Truck was still on but the engine was off, gave it few turns and it wont start. With the key to the ON position my fuel gauge was reading normal, so its safe to say that its not a fuel issue. I then notice when turning the car to the ON position the CEL doesnt turn on; so I check all my fuses. The fuses were all good, the starter relay also clicks, when turning the key to start. I take apart the coil packs and test for spark, no spark. No ECM codes are showing either. I plug in my OBD scanner to see some specs and it wont link to the vehicle, it powers up but wont read. However it seems when I disconnect my negative battery cable from the battery and let it sit for awhile, the truck will start again.

I bypassed my kill switch to ensure that it wasnt faulty or a short in the wiring and I also replaced the EFI relay.
I started my truck in the drive way, let it run for 15 mins and shut it off; waited 10 mins and now it wont start. Still no CEL when turning the key to the RUN position.
Gadget had me test my red (power) wire coming from the AIC box while the key is in the RUN position and im getting 11.60 volts. The problem only starting after installing the 7th injector kit.

Ive read other people having issues a few years back but they never updated their thread with a fix. Google hasnt yielded any solutions either.
Also all connections from URD box to ECM are soldered.

wyoming9

iTrader: (1)

I would check the ECM ground was it relocated ?

Maybe loose .dirty

Moved to a poor place ??as in poor ground location

The fact the MIL is not coming on points me to the ECM ground