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94 3.0 jerking and really rough idle 203,000 miles
I took it to a garage and they guessed it was a fuel pump or the timing was off, but said they were leaning towards the pump. I changed the fuel pump and absolutely nothing changed (the old pump and strainer looked clean actually). In fact it is running even worse than before I took it to NTB. They did a coolant flush, installed a new thermostat, and did a pressure test to see if maybe I had a blown head gasket. They said at 20psi everything showed to be ok except I have a crack in the bottom seam of my radiator. That's my next project.
I refuse to take it back to NTB because they did a bad job and seems like all they did was guess and flood the engine. Does anyone have any idea as to what direction I should go from here? I checked the voltage on the MAF and it seemed to be fine and I cleaned the IAC and that didn't seem to make a change either. I'm clueless and any help would be beneficial. Thanks!