92 4.0L V6 stalling problems...
 

Hi Guys,

My buddy has a 92 4.0L V6 and lately it's been giving him some issues. I thought I would bring it to your attention and see if I can get any feedback on this issue since we can't seem to figure it out. When he starts the truck up it will idle and warm up but he will put it in reverse and it will die. Also when he's driving and makes a right hand turn it will die as well. He keeps having to put it in neutral and re-crank it to keep going while in a turn.

Fuel Filter?
Electrical Problem?

Any ideas? :hypnotize

Thanks!

*bump*

Any takes? Why would the truck just die out when making turns and putting it in R?

Does it do it if you sit in park or neutral and turn the wheel. If so i would look for a pinched or broken wire on the steering colum for the ign switch.

I'll check that.

Remove the electrical connector from the IAC and see if it acts exactly the same.

If so, replace the IAC (Idle Air Control).

Some models have a pressure switch in the power steering system to tell the PCM the idle needs to increase to compensate for the added load from the PS pump. It may have a bad PS pressure switch, if that model has one. (The more I look, the more convinced I become that the 4.0 didn't get a PS pressure switch, only the 2.3's, but I don't have any 92 data)

Another thing to check, I had a Probe do this to me, look for any hairline cracks in the rubber intake hose. If there is one, when the motor mounts flex a certain way, like reverse or right hand turns, it'll flex the hose opening up the crack causing the MAF to read wrong and killing the motor. My probe wold be fine in reverse, but as soon as you put it in drive it would die. "New" junkyard hose, and never had another prob.

Doesn't do it in neutral at all if just idling. When in park can't turn the wheel so it don't do it then either. It only goes out when turning while driving and when he hits a big bump in the road it will die as well.

I'll check that, thanks for info.

I'll check this as well, thanks for info.

I'll keep you guys updated, I appreciate the support.

It doesn't sound like a fuel filter or anything like that...check all those hoses that, double check everythinng though...like connections to starter coil, etc...tell him to remember real hard and see if he or anyone else did any work on it before this happened and maybe start where he or anyone was messing around...sometimes you can bump stuff loose, or move things were they rub and ****!

unplug the maf and see if it changes thats what was wrong with my truck

Will do that too.

Anything else anybody can think of?

If the MAF is dirty and hasn't been cleaned in awhile you think that would cause this?

Earl,

Thanks for your support, it seems it was the IAC. He is getting it replaced now, when he pulled it out all the problems stopped.