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I need help! My 1999 F350 V10 6.8L is sputtering, backfiring, and lagging at low speeds and when taking off. Once I get above about 15-20mph it smooths out and runs perfect. Sometimes it even makes the tranny jump and shift hard. If I turn it off and then back on it will usually fix the whole problem. I just had the transmission serviced, the gasket between the tranny and transfer case replaced, oil is clean, replaced EGR valve, EGR vacuum solenoid, DPFE, Cleaned air intake system including MAF sensor, replaced fuel filter, and replaced vacuum lines to PCV valve. I have no idea what is causing it! It has no check engine lights. The olnly lights I have had are speed sensor, and EGR low flow. Both are gone now.
Any ideas?
Thanks,
James from Texas
Any ideas?
Thanks,
James from Texas