
1996 GMC C1500 Sierra SL 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on
Hi Pros! After R&R of intake manifold, this baby idles beautifully, but as soon as I rev the engine for a few seconds, it starts to over-fuel and cough and sputter. Horsepower down 50-60% under load. If I leave it alone for 2-3 minutes, idle smoothes right out...
Summary posted 11/14/2004
![]()
iATN Members:
Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle (View Replies)20 Replies Received(Hide Replies)20 Replies Received
|
Message Closed w/Summary
|
VIN | 2GTEC19W7T |
Engine | 4.3 L / 6 cyl / GAS |
Trans | 5-speed Standard |
Delivery | FI / TBI |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp On |
Occurs | On Accel |
Trouble Codes
P0300 | Multiple Misfire Detected |
Message Closed w/Summary
Vehicle Data
1996 GMC C1500 Sierra SL
VIN | 2GTEC19W7T |
Engine | 4.3 L / 6 cyl / GAS |
Trans | 5-speed Standard |
Delivery | FI / TBI |
Emissions | OBD-II Compliant |
Symptoms | Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp On |
Occurs | On Accel |
Trouble Codes
P0300 | Multiple Misfire Detected |