Hey Guys, i'd really appreciate some assistance here, its starting to get a little colder outseide and i notice ol' girl (7.3 f250 auto trans) is getting a little rough on me, heres what i got, the truck has one of them older knob chips with 4 settings stock, economic, tow, and performance.
Cold starts blow white smoke out, very sweet, and the idle seems rough (only during the first minute) im thinking glow plugs might be part of it.
i recently flushed the radiator due to some grease like stuff in it, it wasn't diesel and it did not look or smell like oil at all, honestly ive never seen this it was like someone poured a tube of grease in the cooling system the reservoir walls were black from this stuff and lots of shunks came out.
now once ol' girl warms up she runs like a champ, but that first minute is rough, also i left it on stock last night and when i went to start it it took like 4 times for it to start. where if it is on performance she'll start up right away.
also my trans temp gauge hasnt been reading for a while now, stupid question but how do i check to make sure its the gauge thats wrong???