Question about 1993 Chevrolet K1500

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I have a '98 K1500 and it is dumping fuel like crazy, fowling plugs and putting out over 1700 hcc's. Tried new air mass sensor and both air sensors in the exhust. Fuel presure is good and new spark plugs, air/fuel filters. Any Ideas?

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I'd check the MAP (manifold absolute pressure)sensor.

Posted on May 08, 2010

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A poor spray pattern in the injectors can cause starting issues. Have you tried a good (read not really cheap) fuel injector cleaner like Chevron Techron or Valvoline Synpower fuel system cleaner? A weak ignition system (worn spark plugs, leaking wires) can cause starting issues. You mentioned that it has a K&N filter on it. These filters use an oil in a cotton media to filter out dirt. Sometimes that oil can get out of the filter and contaminate the mass air-flow sensor. Follow the air tube after the filter box and you'll find a sensor in the tube with several wires running from it. It is made from aluminum and the wire housing is plastic. Remove it from the tube and clean it with a mass air-flow sensor cleaner. You HAVE to use a mass air-flow sensor cleaner specifically made for mass air sensors. Don't use anything else like carb, brake, or throttle body cleaner. Those cleaners will leave a residue on the sensor and just cause you more issues.

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