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    1996 k2500 low on power

    1996 k2500 5.7 fuel pressure is 60psi with key on engine off when it is idleing it drops down to 50psi and after i turn it off it will drop to 0psi. reason i checked fuel pressure is truck is low on power all across the rev range. is there anyway to tell if it is fuel injectors vs fuel regulator...
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