Question about 1994 Chevrolet Caprice

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I bought a 94 Chevy caprice 4.3 that previous owner changed the feul pump in. Ran fine before but now won't idle and when driving it falls on its face about every 20 secs while accelerating. I replaced plugs, wires, feul pressure regulator, map sensor, O2 sensors, throttle p.s, feul filter, cleaned and checked the m.a.f. Is there anything he could've done wrong installing the pump? Any ideas would be greatly appreciated.

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Are there any MiL codes present? Maybe the exhaust is clogged.

Posted on Nov 17, 2014

  • Ben Anderson Nov 17, 2014

    I don't have a code reader but the check engine is staying on. Exhaust seems fine. The parts I put on did nothing to improve this problem so I assume the feul pump swap he made that caused it is the root of this.

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