Possible Causes & Corrections:
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1992 Pontiac Trans Sport, 1992 Oldsmobile Silhouette, 1992 Oldsmobile Bravada, 1992 GMC Yukon, and 1992 GMC Vandura Special. However, it is still accessible from the selected car via links, so may be relevant.
- Visually check vacuum hoses for splits, kinks and improper connections, as shown on Vehicle Emission Control Information label.
- Check ignition wires for cracking, hardness and improper connections at both distributor cap and spark plugs.
- Check wires for pinches, cuts and improper connections.
- Ensure fuel pressure is correct in all speed ranges. Also check for poor fuel quality or water-contaminated fuel.
- Check for fouled spark plugs.
- Ensure correct PROM is installed in vehicle. Check with dealer for latest application information.
- Ensure TPS does not bind or stick.
- Ensure initial ignition timing is properly set.
- Ensure ECM-controlled idle speed is correct.
- Check EGR system for proper operation.
- Disconnect fuel injector electrical connectors. Crank engine, and check for injector leaks.
- Check for an open in HEI ground circuit.
- Check canister purge system for proper operation.
- Check charging system output. Repair charging system if voltage is less than 9 volts or more than 16 volts.