Random stalling

[terryjm1]

Well, just when you think all is well...

On the 96 D1 I have been driving for about 3000 miles since installing an engine and doing a whole lot more work, it has randomly stalled 3 times in 3 days, It starts right back up, though. We have had a lot of rain and I have been driving in it.

It seems to me to be less likely to be a fueling issue as it starts right back up and it has a new fuel pump. When it has stalled in gear (5-speed) the forward movement results in it only experiencing a short loss of power, sort of pop starting itself.

I know there are a lot of things that can cause this but… any suggestions?

 

[best4x4]

When it stalls, is it at a light or moving slowly in traffic? IAC not keeping up? Sure it's happening so quickly it's not setting any fault codes.

 

[discostew]

I would be looking at the crank sensor. On D1 look at the wires. The insulation breaks down from oil saturation over 26 yrs.
Also make sure you haven’t trapped a harness under the ign. Coils bracket.

 

[terryjm1]

It happened once idling in the driveway. Once going about 40mph and once at about 20mph.

 

[terryjm1]

I was hesitant about using the crank sensor as the engine was a flood recovery. There was a fair amount of rust on the sensor ring. i used a different flywheel but kept the crank sensor. When I get another one off the lift I will swap in another sensor. I have one somewhere in the mess.

 

[Gordo]

I agree look at the wires to the sensor, not just the sensor. Had a similar issue on our D1 and new wires fixed it. Gordo

 

[best4x4]

Yeah those wires get roasted and literally all the insulation just falls off.

 

[terryjm1]

I will check/fix the wires before I swap in a sensor. Thanks to all for suggesting this. I just installed a y-pipe on this one. I could have bumped into the wires and pushed them over the edge.

 

[4Runner]

If it’s not that, have you looked at water intrusion in your ECU. That had me chasing my tail for a while back when I had my 96. Maybe try moving various wires and harness around while it’s running to see if you can recreate it. Good luck.

 

[terryjm1]

If it’s not that, have you looked at water intrusion in your ECU. That had me chasing my tail for a while back when I had my 96. Maybe try moving various wires and harness around while it’s running to see if you can recreate it. Good luck.

I had considered that. i am wondering if water is a problem either there or maybe the wires to the crank sensor getting a bit wet. It hasn’t happened since I made this post and it also hasn’t rained.