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What causes the service engine soon light to come on when fuel gets down to half a tank and run poorly on a 99 Chevy s10 blazer?
Wiki User
∙ 14y ago
WEAK FUEL PUMP YOU NEED 55 PSI AT THE START OF THE FUEL RAIL AND IF YOU GET BELOW 1/2 TANK AND YOUR TRUCK STARTS TO RUN LIKE crap YOU NEED A NEW FUEL PUMP YOUR PUMP IS TOO WEAK TO FULLY PUMP EVERYTHING UNLESS IT IS SUBMERGED TOTALY
Wiki User
∙ 14y ago
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