Went to upstate last week, rig ran absolutely beautiful for 130 miles (it turned over 265,000 going up) and made a couple stops here and there, pulled out and it was purring along. Then it developed a slight miss. Ten miles later it was hard to keep it running, had to rev it at 1200+ rpms to keep it going.
Had to leave it at buddies' house and get a rental car to get us home. Went back next day with car hauler and loaded it up and brought it home to a mechanic buddy.
Codes indicated No 1 not firing and iffy codes on 3 and 5. Pulled spark plug, wet, put in new plug and ran it still wet so installed a new coil. That cleared up part of the problem. Decided to go get coils and got three Borg Warner so they would match. Put them in 1,3 and 5. Still runs but rough.
With it cold we cranked it and felt the exhaust manifold, cold on the front four cylinders. Real hot on the four rear cylinders.
Since there is no distributor and understand this thing is fired by computer, I am thinking the computer must be bad?
Another hint, about a month ago filled up with gas drove 6 miles down to barbershop, got haircut came out cranked it and it was running rough. Shut it off and cranked it again and it purred. This happened twice in about two weeks, Rough, cut off, re-cranked and ran fine.
Engine has had Mobil 1 10W30 since new. Tranny fluid changed on schedule. Original alternator, water pump etc. Had front in rebuilt about 30,000 back with MOOG parts with grease fittings as I planned on running it 400K.
Anybody got any idea of what is happening here?
Thanks yawl
Had to leave it at buddies' house and get a rental car to get us home. Went back next day with car hauler and loaded it up and brought it home to a mechanic buddy.
Codes indicated No 1 not firing and iffy codes on 3 and 5. Pulled spark plug, wet, put in new plug and ran it still wet so installed a new coil. That cleared up part of the problem. Decided to go get coils and got three Borg Warner so they would match. Put them in 1,3 and 5. Still runs but rough.
With it cold we cranked it and felt the exhaust manifold, cold on the front four cylinders. Real hot on the four rear cylinders.
Since there is no distributor and understand this thing is fired by computer, I am thinking the computer must be bad?
Another hint, about a month ago filled up with gas drove 6 miles down to barbershop, got haircut came out cranked it and it was running rough. Shut it off and cranked it again and it purred. This happened twice in about two weeks, Rough, cut off, re-cranked and ran fine.
Engine has had Mobil 1 10W30 since new. Tranny fluid changed on schedule. Original alternator, water pump etc. Had front in rebuilt about 30,000 back with MOOG parts with grease fittings as I planned on running it 400K.
Anybody got any idea of what is happening here?
Thanks yawl