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'99 - '06 GM Truck Modifications
Engine & Performance
Bad idle and poor fuel mileage
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<blockquote data-quote="Canadian" data-source="post: 6635" data-attributes="member: 256"><p>Idle is very rough.</p><p>Motor has stalled going around corners sometimes.</p><p>Codes said O2 sensors so I replaced them.</p><p>At first, I thought great, the idle <em>sounded</em> better and smoother.</p><p>On the way home, flashing engine light again, and idle went back to being bad.</p><p>When I find the time I'm guessing injectors and or plugs.</p><p>I forget the code numbers, but will post next time I scan.</p><p></p><p>I have had a miss fire code from day one (intake gasket I think it was) but it only makes the engine light come on if I set the cruise above 130kmh for any length of time.</p><p>Truck still went like a scalded ape and mileage/idle was fine at that point.</p><p>Truck still works fine at high speed now, but mileage is down about 35%.</p><p></p><p>I'm fine with taking things apart and putting them back together.</p><p>Diagnosing I have trouble with.....</p></blockquote><p></p>
[QUOTE="Canadian, post: 6635, member: 256"] Idle is very rough. Motor has stalled going around corners sometimes. Codes said O2 sensors so I replaced them. At first, I thought great, the idle [I]sounded[/I] better and smoother. On the way home, flashing engine light again, and idle went back to being bad. When I find the time I'm guessing injectors and or plugs. I forget the code numbers, but will post next time I scan. I have had a miss fire code from day one (intake gasket I think it was) but it only makes the engine light come on if I set the cruise above 130kmh for any length of time. Truck still went like a scalded ape and mileage/idle was fine at that point. Truck still works fine at high speed now, but mileage is down about 35%. I'm fine with taking things apart and putting them back together. Diagnosing I have trouble with..... [/QUOTE]
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'99 - '06 GM Truck Modifications
Engine & Performance
Bad idle and poor fuel mileage
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