1994 Ranger 4.0 OHV. It literally sounds like pac man. The high pitch chirp chirp chirp chirp pac man makes when he's going around the board.
Rod? Main?
Anyone have any ideas? I think it's a rod bearing.
Thanks
Dunno!
I'm f'ing stumped.
KOEO code 111 and then CM code 157.
What I've done:
Continuity check all wires and connectors - OK
Replace MAF - OK
Replace ECM - OK
Replaced IAC - OK
Replaced ECT - OK
Replaced TPS - OK
Everything tests OK..
The truck runs rough after idling down upon first...
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