I have a 2001 Ford F-150 5.4L 4x4 offroad with 54,000 miles. Recently when i am shifting from reverse to drive the engine bogs down to about 200rpm or sometimes completely stalls!! this dosent happen all the time but frequent, this is only from reverse to drive, other gears are fine. I have replaced the plugs,pcv valve, tranny fluid, fuel and air filters, and cleaned the intake!

Any ideas would be great..the ford dealer i bought it from dosent know and just wanna keep taking my money lol

 

Check the IAC valve. Its probably your problem.

 

thanks i'll definently check that

 

i had that same problem in my 94 150. you start it up back it out of the driveway put in drive and then its dead and a bear to restart. only realy did it when it was really cold or wet. never figured out the problem.

 

yea mine does it when its warm..i dont know either, and either does the ford service department...kinda pissin me off