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Old 02-01-2008, 08:12 PM
caw333 caw333 is offline
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Re: 98 tahoe backfire

The engine is a 1998 5.7. Ok I hooked a scanner up to the truck cause the engine started running rough like it was out of time. It showed a crankshaft position fault, a camshaft position fault and a maf circuit high and low. I changed out all the sensors and it still ran rough. The scanner is still showing a camshaft position fault even after changing it out twice. So I unpluged all the plugs on the computer under the hood and I found two wires on the white side that looked like they got hot. I'm thinking the two wires that look like they got hot go to the camshaft position sensor. While waiting on the computer to get here I cranked the truck after checking out some other stuff and thats when it backfired and will not start. I put the new computer on but need to figure out that problem now. The motor will turn over easy and will start to crank but just won't. Before the backfire it would fire up with just a slight touch of the key.
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