Intermittent Serious Hesitation on Acceleration

fffowler · #1 (**permalink**) 01-04-2012, 04:25 PM

This is my problem...first off i have an 06 f350 6.0 with 35,000 on it.

Problem: After the truck has been driven for approx 20-30 min and is up to good operating temp it has random but severe hesitation. Most often this happens when starting from a stop but also sometimes when getting into the throttle after coasting for a bit. No matter how hard I push the throttle down the rpms slowly creep up to about 1100-1200 then once they reach that point the motors jumps to life, spools up, and completely takes off.

Can anyone offer any insight? The dealership says they cant reproduce the problem and I keep having the problem come back...Please help if you can! Thanks!

***BDSford03*** · #2 (**permalink**) 01-04-2012, 04:29 PM

Do you have a boost gauge? Sounds like the turbo could be sticking.

fffowler · #3 (**permalink**) 01-04-2012, 04:31 PM

I have no gauges other than stock. the dealer says they havent pulled any codes but i find that hard to believe

***Guy_K*** · #4 (**permalink**) 01-04-2012, 05:34 PM

I would check the egr valve. Mine was doing the exact same thing. It didn't throw a code at first then the next day it threw a p0404. I would pull the egr valve and clean it. For what its worth.. Mine had 43500 miles and it ended up being a blown EGR Cooler causing the EGR valve to gum up. It looked like a friggen death train coming down the road with all the white smoke!

99Smokin73Stroker · #5 (**permalink**) 07-26-2012, 02:26 PM

My truck is doing a very similar thing right now. It will be fine right off of idle to about 1000 rpm, then it'll hesitate (sounds different too, almost as if no fuel is being injected) then it'll be fine. It only lasts about a second or so. I not noticed any visible smoke, but I haven't been looking for it either. Is it the EGR valve? I just bought this truck a week ago....