1990 JEEP YJ

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1990 Jeep YJ

I have a 1990 jeep yj. I swaped a 1989 chev 350 tbi motor out of a suburban. It was in for about 4 years and ran normal til it got a rod knock. So I put a gm crate motor into it. Now the problems begin. It runs fine at idle til it goes into closed loop. The timing is set at 10 degrees. After 5-10 min it starts running rough and dies. Its advancing the timing on its own. Just before it dies the timing has reached about 37 degrees. Stumped. Any thoughts?

Sunday, August 15th, 2010 AT 11:37 PM

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