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Did you test for spark at the spark plugs? It may not be fuel related. Best approach is to get a spark plug testing light, which when hooked up will show if there ignition system is sending energy to the spark plugs. Once you know that, you can make the right course of action.
The coil with the yellow lead from the pulser supplies sparks to the inboard cylinders. The coil with the blue lead supplies sparks to the outboard cylinders. That is all the rules needed, as the coils fire both cylinders though one is on the compression stroke while the other is on the exhaust stroke.
cleaned tps sensor with trottle body and put in injector cleaner with premium gasoline and found when i had the lube and oil done they loosened a spark plug wire. although it is not perfect yet it seems to be headed in the right direction. thanks for your help. pat
the problem is common for the 93-94-95 4.3 vortex its the spider injection located inside the plenum the part costs between $250 to 400 i had to replace on girlfreinds 94 blazer. ifound one o ebay for $100
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