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Old 08-30-2005, 12:25 AM   #5
oldyeller
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Join Date: Mar 2002
Location: Anna Texas
Posts: 726
on the 96 4.3 it should average 55 psi, the window is 52-58 i believe. it needs min of 50 to start, the cat. could also be an issue, crawl under there and tap on it, if its loose and rattling a piece could have broken off and is blocking the exhaust flow causing major back pressure. also have you checked for spark?
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72 LWB Fleetside C10 Custom 350/350
97 GMC Yukon 4X4 SLT
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check out the project old yeller
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