Question about 1992 Chevrolet Lumina APV

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Runs sluggish at start up. It will cough, sputter, chug for about a minute(it seems). If you can get the rpm's up, it will sort of walk out of it. We've recently replaced the spark plug wires, oil, fuel and air filter, added sea foam to the fuel tank, and filled the tank with premium gas

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  • Anonymous Dec 27, 2008

    runs good until engine warms up,then it starts to cut out and backfire.then the check engine light comes on before the engine dies.

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  • Possible vacuum line related, suspect problem was related to EGR valve, as this was replaced Nov 07. Problem came back this past weekend. noted vacuum line to EGR valve had no vacuum. I removed device-located top front side of the engine near serpentine belt, noted foam filter inside-cleaned filter reassembled and problem cleared. I believe this device (part of emissions System, investigating official name) may be the culprit. This device has two vacuum lines coming in and 1 electrical connection obove the serpentine belt. with the foam filter removed I was able to stall out the engine by placing my finger over the orfice (care-full of the fan belt). This must be an electrical solenoid that goes intermittent.
  • Posted on Jul 28, 2008

    • rfmtech Jul 29, 2008

      Device is" EVRV solenoid assembly". Circuit description: the ECM operates the regulator (EVRV) to control the EGR valve. It's worth noting to check the Fuse labeled ECM1 at the fuse panel as this is direct power source. A defective EVRV will illuminate the check engine lamp and error Code 32 will be set (per tech pub). Check to make sure the source vacuum (from the TBI base) is not restricted before T/S this device.

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