LB7 surging - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 1 (permalink) Old 06-07-2015, 06:02 PM Thread Starter
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LB7 surging

I have a 2001 GMC 2500HD 4X4 crew cab. The injectors and CP3 were changed at about 119,000 miles by the previous owner. Tune is bone stock, intake is stock, and I think the exhaust is an aftermarket, ( the pipe is about 3 1/2 inch.) The truck now has 263,000 miles. Sometimes on light acceleration, it surges like you are tapping on the gas, but you are not. There is no CEL, and no codes. fuel filter was recently changed. At speed, it is fine, and does not do it all the time. Any ideas from any LB7 gurus out there?
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