I have a 1988 F 150 two wheel drive truck. The last few days the truck stall while making a turn or stopping quickly. I don't know where to begin to look. Any help or suggestions would be greatly appreciated.

 

Could be a dirty IAC valve. Leave it idling and turn the steering wheel. Does it want to die?

 

It could be your throttle position sensor. This can go bad without throwing a code(turning on emission light)

 

My truck wants to die when I turn the wheel... how do I clean the IAC valve? I know where it is and everything.

 

Unbolt it and unscrew the electrical connector. Now clean the non-electrical half with some carb cleaner. Also clean inside the throtle body.

High fuel pressure will cause a near-stall when turning the steering wheel and when you shift to reverse or to drive. Also, the idle is real rough and surges.

 

yes I am experienceing all of that.. Stalling or near stalling when I shift to reverse or drive... or turn the steering. I will clean my IAC valve.. maybe that will solve the problem?

 

I was going to say in my original post that it seems to be associated with left turns, but I thought you guys would think I was nuts. I will clean the IAC and see if that does the trick. I do have a question concerning one of the replies. I have had a surging idle for years and in one of the posts a dirty IAC was mentioned as a possible cause. Would a dirty IAC make cold starts especially the first start of the day difficult as well? Thanks for all the replies

 

I have cleaned the IAC. Is there any chance that this problem coulb be caused by the throttle position sensor? Thanks again for your reply.

 

Is the check engine light coming one, f1501988?

turboguy, check the fuel pressure. If you also get horrible gas mileage, I would just go ahead and replace the Fuel pressure regulator ($25).

 

I cleaned the IAC and tha fixed it. I do not have a check engine light on. The idle seems to be very low. Thats why I was wondering if it was the TPS. don't know of a way to adjust the idle. I would imagine it is a factory setting. I will check the fuel pressure to see what it is. The gas mileage seems fine. If anything I suspect it is running lean. On hard eceleration I hear a clattering noise. It isn't real loud or metallic but you can hear it. The noise is similar to that of a car that is diseling and won't shut off. Thanks again for all the help. The truck is not stalling anymore. I drove it today and it didn't stall once.