I'll try to be brief, Had a shop do engine swap on my 98 navigator, (motor from another source with less than 80K). Picked it up running great! Handed of the 1500 to the guy and had a nice day. Around 700 mi later it began to 'hiccup' a bit, kinda like when a COP is about to fail. I figured I could let it go for then b/c I was so busy and it wasn't giving any code. 2000K mi later it's running so bad it hesitates to climb a basic grade. It occurred to me to clean the MAF. Well, opened it up...
Running Ruff
