Hi Im new to this site but I need some help. I have a 92 F150/5.0 4wd...
The problem Im having is when the truck warms up it develops what I thought was a miss BAD.. This Miss only happens when Im at 0% on my gas pedal thru to about 50 % throttle.. So I CAN power through it.. I thought it was possibly the Coil going bad so I replaced the coil, Dist, new plugs,wires cap rotor.. Pickup coil came with the dist. after this small ignition overhaul The problem still exist.. Im more convinced now that it is A Fuel/emission issue.. Instead of a Miss now, it is more like its HUNTING.
I can shut it off and reset it for a minute or two but it returns.. I know I need codes, Just trying to see if anyone has an idea on this one.. BTW The check engine light comes on in the start up cycle but goes right out and does not come back on even when it feels like the truck will buck through an intersection..
Im no tech so can someone lend an ear to my dilemna.. Thanks all

 

And to also note: TPS was changed 3 mos ago..

 

What kind of TPS was used? If it was not a motorcraft one then that is still likely your issue. Check and clean the IAC as well. Also go ahead and pull those codes.

 

Same problem, same truck, but ive pulled codes and only got 111/pass.
Replaced all ignition, and tps.

Is your problem accompanied by any sounds?

 

The only sounds are ones that sound like misfires and or Fuel gaps but NO back fires. Im positive the timing is on point.

 

but i mean while driving, theres no ticking or 'bicycle chain' noise?
im sure its not the fuel pumps, as both tanks have the same exact effect on mine.
Next I'm going to try the fuel pressure regulator, EGR, EVP, and plugs...

 

If you want good ideas, check the codes.

 

30$ for the tester is well worth it....

 

This way is free: https://www.f150forum.com/f10/how-re...es-obdi-10907/

 

Scan the codes guy! I did, but I got nothing

What if he gets nothing?