I got a 03 ecsb with a 5.3 that has a rough idle, and no ecu code. It only does it while I'm in drive with the brake on. I was thinking maybe a vacuum leak. The truck is bone stock.
I got a 03 ecsb with a 5.3 that has a rough idle, and no ecu code. It only does it while I'm in drive with the brake on. I was thinking maybe a vacuum leak. The truck is bone stock.
99 excab, Nelson Tune, k&n FIPKII, pacesetter long tubes, No Cats, Dual Magnaflows with turndowns,
1/4: 15.66@88.1 Before Nelson, headers, and de-cating
Also 69 camaro SS 350 4speed, 13.81@103.6, Ls1 swap planned
Plug wires, plugs, check your injectors, possibly o2 starting to go out, possibly a clogged cat.
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
Clean your throttle body first - then look at the other items listed.
Idle misfires are usually fuel or injector related. Acceleration or load misfires are usually ignition related.
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