4.0 OHV Idle Problem

1995 4.0 EB with 135K miles. Runs great - usually. For just the second
time (last time was about 4 months back) would not start after a 20
mile freeway ride. After a brief stop, immediately stalled out when
starting, and even feathering the gas did not help. After abou 15 tries
in a 1/2 hour period, was finally able to feather the gas enough to not
stall out. Drove home about 5 miles, riding the gas and brake (while
slowing down or stopping) to keep from stalling. After I got home it
started right up normally with no problem.

No check engine light, and I doubt that I could find any problem with
the IAC valve when its running right. Before I change out the IAC valve
- wanted to see if anyone has experienced this intermittant problem,
and if the IAC valve was the actual cause.

--Len

Len wrote:
> 1995 4.0 EB with 135K miles. Runs great - usually. For just the second
> time (last time was about 4 months back) would not start after a 20
> mile freeway ride. After a brief stop, immediately stalled out when
> starting, and even feathering the gas did not help. After abou 15 tries
> in a 1/2 hour period, was finally able to feather the gas enough to not
> stall out. Drove home about 5 miles, riding the gas and brake (while
> slowing down or stopping) to keep from stalling. After I got home it
> started right up normally with no problem.
>
> No check engine light, and I doubt that I could find any problem with
> the IAC valve when its running right. Before I change out the IAC valve
> - wanted to see if anyone has experienced this intermittant problem,
> and if the IAC valve was the actual cause.
>
> --Len

Most of the time, with the symptoms you describe, its the IAC valve.
Try removing it and cleaning it first with WD-40. If that does not
work, you might need a new one.