Crack in harness? Engine shuts off after receiving no temperature reading...
 

Hi all,

After getting my FD all rebuilt, I've run into a problem where the engine simply shuts off intermittedly due to receiving 0 degrees temperature from the engine temp sensor.

During testing, sometimes the engine rocks back or forth, and then just cuts off. I had a gentleman from Japan, who owns his own shop that works on rotaries tune it. His name is Jin Horino, and he maintains Drift Samurai from D-1's car. He came over and tuned up the car.

Unfortunately, he only had about a day to do it, so we got it all tuned, but were unable to diagnose the problem.

I believe the sensor is still good, but that there's a break in the wiring harness that whenever the engine moves a certain way, it disconnects, and the engine shuts off.

My question is...does anyone have any idea what the port or pin the wire from the engine temperature sensor goes to? I'd like to run a bridge from the sensor to the ECU. It's the sensor from the thermostat housing.

Thanks for the help!

Offhand I don't know but I have been able to find the pins using the wiring diagram in the sticky thread.

Dave

Thanks for the heads up. Weird, but the problem is gone. I got the vehicle to my house over a 20 minute drive, and didn't experience it. When it was having problems, it was because the guy had his computer hooked up to the PFC and some stuff plugged into the engine. I wonder if it might have been something bad in his equipment?

Either way, the car ran like a champ all the way home. It felt great to drive it again!

About 18mos ago I had similar problems on a stock ecu. The car would cut out or refuse to start somewhat randomly. I got a water temp sensor code once; that was my only clue. I had been doing a lot of rats nest and fuel rail work prior. Sensor tested out fine, wiring tested out fine.

New wiring harness solved the problem for good.

Dave

Yeah...I'm watching it....other than a high idle, it's running great...knock at power is like 21 or something...pretty low, so it's fine.