Question about 1999 Chevrolet K2500

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K2500 chevy 3/4 ton pick up. no power under load

K2500 chevy 3/4 ton pick up. 5.7 engine, 82,000 miles
idles great runs fantastic no codes, no misfires.
no power under moderate to heavy load
backfires out of throttle body when heavy acceleration.
Has new dist cap, rotor, wires, Platinium plugs, fuel filter,
fuel pump asm. All AC Delco parts used for replacements
no change to power as each part was replaced
fuel psi 64 key on, 56psi running

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  • Chevrolet Master
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IN your distributer under the rotor is a magnet and a pickup coil (the magnet is known as a pole piece) check your pickup coil for corrsion (green in color) and the module and also check pole piece for cracks in the magnet where the rivets hold it together. sometimes oil wicks up around the distributer shaft because of housing wear or the pieces just wear out over time.

Posted on May 16, 2010

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