1993 F-250 plow truck
Join Date: Dec 2009
Location: Snow Belt, Geauga County Ohio
my 1995 5.8 idles fast-slow-fast-slow.....
My 1995 F250 w/5.8 EFI, autiomatic farm truck starts up fine and then idles up to 1,000/1200... then it drops so low it quits sometimes. If I stay inside (instead of brushing 16" of snow off the hood while it warms up) and keep my foot in it, it runs fine while it warms up, then I can leave it alone. At working temp it runs and idles like a champ. I did find a vacuum leak under the hood and repaired it. The only thing that changed is that all my HV/AC selections work again. I picked up a shop manual for the truck and am now wondering if the IAC is shot or just needs removed, cleaned and replaced. Any one been here, done this?
Forgot to mention that while this is going on I smell raw fuel at the back of the truck until it settles down so I'm wasting fuel as well.
Your guidance, suggestions and comments are greatly appreciated!