I have a 1994 F150 with 5.8w and E4OD. Starts up and idles great but sometimes is hesitant to accelerate, tach will bounce up and down sometimes, and will stall out when coming to a stop sometimes. Didn't do it to me yesterday at all then today on the way to work did it 3 times. Got codes 10 and 536 but not sure if they have anything to do with my problem. Anyone know what could cause this?? Thanks, Jason.

 

Code 10 is a "Separator" code

Code 536 indicates the "BOO" switch is not working correctly.

Code 536 shouldn't affect idle or stalling. Has the truck had a tune up?

I would try cleaning the IAC valve 1st. Start with the EASY stuff first.

 

Brand new IAC, TPS, 19lb injectors, fuel pressure regulator, fuel pump, and thoroughly cleaned throttle body and intake plenum. Ran through whole harness for loose or broken wires and cleaned and greased every sensor plug just because I'm OCD...lol.

 

I'm a believer in being thorough. Nothing wrong with OCD.

Of all the new parts you replaced and installed, which are Motorcraft and which are part store brands?

 

Yes motorcraft or BWD.

 

Not a fan of BWD, only for an emergency. What was replaced with BWD?

Does it only stall in Drive or reverse? Does it stay running in Park or Neutral?

 

BWD TPS and IAC I believe. Everything else is motorcraft. Only stalls in drive and it only happens sometimes. Engine runs perfect in park and neutral.