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2005 Chevrolet Trailblazer LS 4.2L Spark knock at idle
when hot(210`)spark knock can be heard at idle in gear only,If we add small spray of carb cleaner niose stops instantly but returns when you stop spraing carb [...] have cleaned combustion chamber(motor vac)also pressure flushed injectors,and added 5 gal. prem...
Summary posted 8/1/2012
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Related Documents & Media | VIN | 1GNES16S15 |
| Engine | 4.2 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Spark Knock at Idle |
| Occurs | Hot, Idle, in Drive |
Message Closed w/Summary
Vehicle Data
2005 Chevrolet Trailblazer LS
| VIN | 1GNES16S15 |
| Engine | 4.2 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Spark Knock at Idle |
| Occurs | Hot, Idle, in Drive |
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