Replaced DPFE, but it's still bucking!
I've been suffering the dreaded bucking/hesitation/jerking at cruising speed (50-60 mph) and have tried several things to make it stop. O2 sensors replaced about a year ago, problem gone. Hesitation started again about six months ago so I replaced the plugs, problem gone again. Bucking started again about a month ago so I got a new DPFE. The hitching is about 90% better, but still there. Now what? Is there something that might be dirty or gunked up that I can clean? I just cleaned my MAF and K&N not too long ago, so I don't think that's it, but I can easily clean them again.
The only other thing I can think of in searching this and other forums is maybe my camshaft position sensor and synchronizer might be going bad but I don't have that chirping sound that goes along with a bad CPS. I'm not a big fan of replacing perfectly good parts, but I'm at a loss here. What else could cause this highway hesitation?
1998 Ford Ranger XLT 3.0 4x4
31" Wildcat AT's / Magnaflow Cat-Back Exhaust / SCT X-Cal 2 / K&N Cold Air Intake / Screamin' Demon Coil Pack / Underdrive/Overdrive Pulleys
Clear Head & Corner Lights with Silverstar Ultras / '07 Taillights / Advance Cover Hard Folding Tonneau / Herculiner Bed Liner / Kicker 10" CVR Sub
Kicker ZX 300.1 Amp / Explorer Leather & Power Seats, Center Console, OHC & AutoDim-Headlamp Mirror / 4.10 Gears
Too many to list here
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U.S. Army Military Police
Last edited by RentonRanger; 12-29-2008 at 01:04 AM.