Would this cause a 98 Venture 3.4 to surge after warm up to normal operating temp??????? I've replaced the upstream already. I was told the downstream is just for emissions.......
Im a moderator there and there are quite a few trusty mechanics (gm mechanics too) i think they could probably help you!
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Matthew Brough
1998 Chevrolet Venture -- 104,000 miles
1988 Chevrolet Silverado -- 156,000 miles
1996 Chevrolet Cheyenne -- 107,000 miles
My 96 and 88 before the resto.
My 88 after the Restoration.
