stalling

OK. So it is a 2001 prerunner TRD. bone stock. 3.4 v6 auto trans. When sitting at idle it will sometimes start to run rough and die. At speed it seems to just hiccup once or twice and keep running. I first noticed the issue when activating the rear diff. It happened several times but only when rear diff was locked. Now it seems to just do it randomly. There is no common factor. Diff locked or free, sometimes does it sitting at idle, sometimes driving down the road. Hot or cold makes no difference. It is so intermittent but it doesn’t appear to have anything to do with bouncing around or hitting bumps as it does it just sitting in the driveway. All wiring looks good, grounds are clean and tight. I took it down to the Toyota shop and they got no codes and couldnt get it to display the issue.

 

Mine did the same thing, it was the TPS (throttle position sensor) mounted on the side of the throttle body. It did this until it finally failed. Replaced and no more issues.

Hope this helps.

 

I will Check the TPS for sure. Any other ideas of what to ceck after the TPS check?

 

I got a similar problem rough idle (but does not die but seems like it might) at stop light but gets better when parked and its gone when driving, I cleaned the maf and got a little better but its not the problem?

 

I had a plug foul once that didnt throw a code for a couple weeks, i changed fuel filter thinking that was it but it was a misfire causing it. New plugs and wires and all is good.

 

My truck is doing almost the same thing. It runs perfect until i come to a stop and it cuts off. put it in neutral and it cranks back up.Just got the truck and i really havent looked it over. Any suggestions on where to start?