Originally Posted by f250d4x4

ok back again----after replacing the maf it ran/idled much much better when it was warm.Cold it still struggled...replaced the tps (over 200k fer sure so yeah i crossed my fingers and threw some money at it)....it runs better now when its cold but it wasnt a giant improvement like with the maf.----Now it runs pretty decent at speed and will idle decent when it is warm but when it is cold it still is not too good.Also it will die when revving high and letting off.Such as driving in parking lots or making turns into entrances.Its a pita. ---I found my code reader,showed no code light but after clearing the ecm it showed the front 02 sensor bad.Read it later it showed front and back 02 sensors and miss at cyl. 2. Wires and plugs new. 02 sensors replaced not long ago.-----------dont know how to read this or what to make of it. --any help is appreciated.