99 f150 problems
01-10-2008, 11:40 AM
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99 f150 problems
I have a 99 f150 4wd 5.4 w/ a weird electrical problem .
accelerating down the road (doesnt matter what spd.) the tach and spedo will start to go wacky eng. will run rough trans will go to neutral , then stall , in order to restart while moving , put in nuetral you have to turn the key all the way back before it will start, but it will restart without problems. this prob is continuous. no matter hot / cold. tried a new reflashed computer, tried new ign sw . by the way there are no code's in the comp. or any other module. problem can be duplicated sitting still by power braking.
accelerating down the road (doesnt matter what spd.) the tach and spedo will start to go wacky eng. will run rough trans will go to neutral , then stall , in order to restart while moving , put in nuetral you have to turn the key all the way back before it will start, but it will restart without problems. this prob is continuous. no matter hot / cold. tried a new reflashed computer, tried new ign sw . by the way there are no code's in the comp. or any other module. problem can be duplicated sitting still by power braking.
01-10-2008, 12:23 PM
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99 f150 problems
Sounds like it could be a speed sensor problem in the transmission, especially if it's going into neutral by itself. Or, there's another transmission issue tied in with the magnetic pick-ups on the speedo & tach.