Why am I losing power and backfiring?
I have a 1998 Series 60 with 825,000 on engine re-uild. This last summer I had a guy "tune up" my ecm, but he didn't do it properly, as it has belched black smoke when I throttle up since. Today I was coming down I-65 in Indianapolis, IN and went to pass someone and I lost power and it was like my truck backfired. Now I can cruise along for a while, but when i go to give it more power it loses power and backfires. I am idling at the Waddy, KY Flying J and the truck is running fine while I am sitting here. What could be causing this loss of power and backfire?
Got the truck back and he replaced the air filter and the air inlet hose to air compressor.
I'm bobtailing but have power and can hear the turbo spool up.
Everything seems ok so far.
Is this a worthwhile discussion?