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2003 Chevrolet Suburban 1500 LT 5.3L Poor Idle Quality, Misfire
car came in w/po300 miss fires ck plugs & replaced ck wires coils & injectors all good ran compression ck all at 145 to 160. tech then ck fuel pressure an found it below spec 40 psi replaced pump & filter still no fix ck back pressure on cat had .5-1.0 at idle...
FIX posted 8/23/2007
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Related Documents & Media | VIN | 1GNFK16Z93 |
| Engine | 5.3 L / 8 cyl / FLEX |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Hot, on Accel, Idle |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Message Closed
Vehicle Data
2003 Chevrolet Suburban 1500 LT
| VIN | 1GNFK16Z93 |
| Engine | 5.3 L / 8 cyl / FLEX |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Hot, on Accel, Idle |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Video