dend
New Member
- Joined
- Sep 11, 2020
- Messages
- 9
- Reaction score
- 2
- Points
- 3
- Location
- Usa
- Vehicle Year
- 1987
- Make / Model
- Ford Ranger
- Transmission
- Automatic
Hi. I am new to this forum, and would appreciate your advice. I inherited a 1987 Ranger with 2.9L with auto transmission. It starts and idles well at cold startup. After short warmup when you try to give it throttle the engine will start to die out then have erratic acceleration and dying out. After full warmup it does the same thing when driving. It does seem to accelerate properly if you accelerate hard. It was worse before I tuned it up, and would not idle after a minute or two. After testing and replacing the MAP the truck idles well. I replaced plugs, wires, cap and rotor button, MAP, and fuel filter. I tested the TPS with a voltmeter and voltage increase was smooth with no flat spots. I put a can of sea foam through the throttle body, and sea foam in the fuel. I Disconnected the IAC to see if that would have an impact, and the truck would not start. Not sure if that means the IAC is “working”. Any help would be appreciated.