HI,
I have a 2002 Ford F150 XXLT model. Has the triton V8 in it.
I have noticed when i try to excelerate almost at any speed it hesitates.
could this be a Cat problem or something else?

But If i run solid at a certain speed lets say 70MPH, it runs great.

All i have on this truck is a K and N air Filter and a Magma Flow Muffler Dual.

any help is apprecieated.
thanks
jason

 

sounds more like a spark plug issue how many miles are on the truck and witch motor is it? could be spark plugs o2 or a dirty thorttle body.

 

4.6 Triton V8.

138K on it

Had it serviced around 125K major overhaul, spark plugs and clean all the fun stuff.

cost me 1K because some PVC body collasped

 

Well them maybe your catalytic converters are getting clogged up. If you can get that verified, then buy Magnafow hi-flow cats to gain some more sound volume, and flow better.

 

Your o2 senors get changed in that big over haul too? one of mine failed and my truck ran like crap i got about the same amount of miles you do.

 

Well I can tell you what it isn't. It's not a valve or fuel injector problem because I was having these same probs with my Ranger. We had them remove and clean my entire valve train and they replaced the injectors and it still ran rough and hesitated like a straight man walking into a gay bar.

 

is there a difference in hesitation between fast and slow accerleration? it sounds like it happen after ur tune up, is that correct?