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Chevy 250 Cid engine problem..
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Posted by Mike Burdick on July 24, 2005 at 09:14:49 from (67.4.36.235):
I have a pickup with a GM 250 Cid engine, 6 cylinders – carburetion. About a week ago it suddenly started running badly and then I noticed the oil pressure gauge dropped to zero. I immediately shut the engine off and towed the pickup back to the ranch. A couple of days later I had time to look at it and started it. The oil pump immediately had the required pressure but the engine still ran badly – like it was out of time. I retimed it (it was okay by the way) and started it but it still ran rough. I took the compression in each cylinder and all were even and within specification. I removed the pan and looked at the oil pump and it was fine. Do any of you have some clues as to what is happening or what I should check out next? Any help and/or advice would be greatly appreciated… Mike
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