Question about 1994 Chevrolet Caprice

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Wont stay running

This is a 1994 with the 5.7 this is a old police car with the LT1 motor....the car runs for about 5 min and shut off....i get a smell of fuel....the car will not start up for about hour and it is a rough idle at first....I am getting black soot out of both i did just replace everything on this car, map sensor, wires, plugs, air flow sensor, ing. module, coil, ...the car is threwing no codes, (With OBD 1....they may be some codes that I cannot pick up) I did notice yesterday that the Eletric Air Pump (It pumps air into the exhaust man and does something/reused with the fumes... well the negative on the connetor is almost melted, like some kind of short, I believe that the pump burnt out....I guess this may cause the car to run rich and will this cause the car from running???

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The air pump will not change fuel mixture it is used to reduce emissions by adding air to the exhaust to allow the fuel to finish burning
after you replaced all those sensors did you reset the computer (unhook the battery for about 5 min)?

i would pull the plugs clean them, with the plugs out crank it over to clear the cylinders. reinstall the plugs and start it

Posted on May 16, 2009


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