Why can't i keep my truck running keeps stalling out when in drive
Asked by ford1970 Mar 03, 2022 at 07:09 PM about the 1990 Ford Bronco Eddie Bauer 4WD
Question type: Maintenance & Repair
Our truck has been sitting for over a year,so we put in new batt,drained out old
fuel and repl fuel filter,cleaned out throttle body and we got it started,idles
somewhat ok,but when we go to drive it , it seems to die out we have to fether
the gas and brake to keep it running
any suggestions
2 Answers
beatupchevy answered 3 years ago
get it to idle normally not just somewhat O.K. spray some carb cleaner down the throttle , do a compression test . What do the plugs look like ?
Ford OBD 1 system, these wee bad for failed ACT sensors and IAC motors, this one sounds like the IAC motor has quit, now you can try removing it and cleaning it up and the passages and putting it back on. No remember these old systems had to relearn after the power was disconnected, so I would disconnect the negative battery terminal then turn on the headlight switch for a few minutes, then turn off the headlight switch, reconnect the battery terminal, set the park brake and block the wheels start the engine and put it in drive and turn on every system, headlights, heater fan, etc. and see if it will stabilize the idle after about 5 minutes, if it does then drive normally for at least 10 minutes. If you can't get the idle to set right then you may have some sensors misreading. You need to find a shop that has a Ford breakout box and the older equipment to diagnose this system. Sitting is a very bad thing on any computer controlled vehicle.
