I was driving my truck this evening and while sitting at a traffic light, the truck just shut down. I put the truck in park and it started right back up. I got to where I was going and shutoff the truck and stayed where I was for about a couple of hours. When I left to come home (about a 12 minute drive), I made it about a block from home and the truck shut off again when I stopped at a stop sign. I put the truck in park and this time, it wouldn't start up again. While trying to start the truck, I noticed that the oil pressure light wouldn't go off. I put on the flashers and walked over to my home to get a flashlight and a piece of wire to possible jump the oil pressure sender. When I got back to the truck, I tried starting it and it fired right up. I drove it home and parked it in the driveway.

The last time this type of behavior happened (just a couple of months ago), the problem seemed to be my oil pressure sending unit. When I worked to replaced it, I noticed that the oil pressure sender that was on the motor seemed to be leaking some oil out of the top of the sender when I removed the electrical connector from it. I replaced that sender with one I purchased from Advance Auto parts and all has been well until now.

To me, it sounds like I have another bad oil pressure sending unit. Does anyone have any other thoughts as to what this issue might be?

 

Oil pressure sensor won't cause a no start. If I had to guess you got a failing crank position sensor

 

Thanks for the thoughts. Are you sure about a bad oil sender not allowing the motor to start? If you have an oil pressure sender that reads zero, I thought it would shut down the motor and also not allow it to start?

 

The motor needs to start(turn the oil pump) to build pressure then the light will go out. If it only stalls when you stop it sound like the iac.

 

Thanks for your thoughts. The last time I tried to start the motor after the engine shut off close to my house, the oil pressure light would not go off on the dash while trying to start the motor. The motor had to be building pressure while cranking, so I'm at a loss as to why that light wouldn't go out. When I went back to the truck after walking home to grab a flashlight and a jumper wire (about 10 minutes), I took a chance on trying to start the truck and it fired right up. Just as an FYI, the truck has been running great, with a rock solid idle. No engine issues had been experienced before, except the oil pressure switch being replaced back in August. Does the IAC tend to just fail intermitently when they go bad?

 

On yours, the pcm simply does not care about oil pressure. So far as I know, it doesn't monitor it. Next time it dies, see what's missing, fuel, or spark.

 

Mine did somewhat same thing when my speed sensor on rear pumpkin had gone bad, I thought it was transmission not downshifting cuz it didn’t know speed but new speed sensor fixed mine

at same time mine would always restart. It never didn’t start back up

 

So I disconnected my oil pressure sensor on my 01 and it still started. I believe maybe you have a bad wire going to the crank sensor? It sucks you really can't see back there

 

Thanks for the thought. I'll try the same for my '96 to see if I get the same result.

I drove the truck today to make a run to the dump with my utility trailer and had no issue. I hate intermittent issues like this...

 

I understand your struggle lol I got a vibration I can't pinpoint. Usually that's a crank sensor but if you are like me you will not just throw parts at it