Having problems with your 1989 Ford F 250 ?

1989 F-250 5.8L 351W ''Rough Idle/Stalling''

\015 I just had an 1989 F-250 given to me by my boss. When I got it, it didnt start. I had to jump it to get it to turn over but it just cranked (no start). It has a new IIAC valve. I replaced the ignition module on the distributor and it started right up. Now it will start every time i turn the key, but it will not stay running until it warms up which is impossible unless I'm on the gas to keep it alive to get it warm. It runs normal for 10 seconds or so then sputters and dies, also the check engine light flickers around mid-range rpm's while im on the gas to keep it running. Once its warmed up it will run only in park as soon as i put it in gear it stalls unless I use two feet. while in park it revs up then back down and comes close to stalling and then picks back up, which pointed me in the direction of a vacuum leak. I also replaced the cap and rotor as well as a handfull of vacuum lines, and am still having the same problem. I have been working on vehicles for most of my life and this truck is driving me nuts. I'm sure its something that I'm just overlooking. If anyone can provide some help it would be great. I'm out of work because of this and I really cant afford to be. Any hints or suggestions will be greatly appreciated. Thanks, Steve.''1989 F-250 5.8L 351W 2WD''Other vehicles I have,1989 Probe GT 2.2L 5spd Turbo1968 Buick Skylark 350 Nailhead 2spd Powerglide1991 Honda Civic 1.5L 4spd1996 Honda Accord 2.4L VTech2001 Hyundai Santa Fe 2.4L1986 Ninja ZX-6 600R 1981 Honda CB900C1986 Honda Rebel 250\015 Posted / edited by AnonymousUser on : 15-07-2019

Answers :

Is the IAC clogged or not adjusted properly you could have also received a bad IAC from the parts store...check your fuel pressure could be a bad pump or pressure regulator valve
It could be old gas.
Repair Help & Product Troubleshooting for 1989 Ford F 250

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