E99 question - Ford Powerstroke Diesel Forum
 
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post #1 of 4 Old 12-18-2011, 10:34 AM Thread Starter
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E99 question

Got an e99 F350 automatic 4x4 srw. When going down the interstate on cruise control when going down a hill or if engine lets up the truck starts what i call bucking? If I step back on the gas it quits. And if Im pulling our horse trailer its worse. Any ideas? does not seem to do it if im not on cruise
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post #2 of 4 Old 12-18-2011, 10:41 AM
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i had the same thing happen to me at about 70 while in cruise control
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post #3 of 4 Old 12-18-2011, 10:44 AM
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mine used to do it i changed my pcm and it helped the cruise control buck i switched from the xle4 to a pmt2 just make sure its auto and out of 02 or 01 not from california also a lot of the 7.3 had a cruise control recall i suggest u check in at the ford house i kno its free i put em on all the time. if its a very serious buck/shake might b trans issues

1/30/98 EARLY 99 7.3 F350 DRW CC 4X4 4R100 3.73 LARIAT
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post #4 of 4 Old 12-18-2011, 02:41 PM
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Yep, mine too! Only occasionally. If its the PCM I hope tuning cures it!

Early 99 F250, Tuned by Gearhead, Diamond Eye 5", DIY intake, GS EGT/Trans/Boost, FRX, HPX, CCV, Schaeffers 9000, ELF7405, Stancor

Next: A Better Trans Cooler, 35"s
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