Question about 2005 Chevrolet Silverado 3500

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8.1 L silverado rough idle & coolant smell

I have a 2004 Chevy Silverado W/ an 8.1 L, A couple of months ago I started smelling coolant when driving. The smell became stronger upon acceleration. I have checked the coolant tank several times & have not seen any loss of coolant. I have also developed a rough idle when at a stop . When I connected my scan tool to the truck it said that I had a random , multiable miss fire , bank 1 & 2 were lean & MAF. I have replaced the MAF , Ign wires , plugs , 8 coil packs & cleand the throttle body. I still have the miss but am not showing any codes. Any advice would be great.

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6ya6ya
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Posted on Jan 02, 2017

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motor1258
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SOURCE: 2000 Chevy Silverado 4.3 will not start.

I'd disconnect my battery, and start unplugging every sensor connector, computer connector etc that I could find and spray them with contact cleaner, blow them off if you have compressor, add a little di-electric grease and put them all back together & try that first. You never know, you just might cure it, and materials are cheap.

Posted on Jan 02, 2009

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SOURCE: Chevy truck '02 surges between 45 and 55 mph

you should change the tps( throtal position sensor) this can cause that problem

Posted on Aug 15, 2009

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SOURCE: Code 171 Bank 1 too lean

well actually you cant clean the mass air flow,you usually ruin it when you clean it,it could be a bad maf or just crapy gas,not crappy enuff that the car doesnt run,but enuff it doesnt like the air/fuel mixture and is setting the light

Posted on Oct 10, 2009

  • 58 Answers

SOURCE: 2003 tahoe

For p0300 ,p0240 on chevy tahoe 00- 06 check a wire going along with the battery ground to the engine block thre should be a high resistence on the small wire ,it gets corrode over time ,it should be located on underneath of the driver side engine,

Posted on Feb 19, 2010

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SOURCE: I have a 2002 Chevy Silverado 2500HD with 6.0 V8

sounds like coolant is getting into the combustion , i would start with no2 cyl , its a place to start, could also be a leaking injector,

Posted on May 05, 2010

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I'm having overheating problems with my 2004 chevy silverado two wheel drive ext cab. I'm frequently havining to add coolant. I have not found any leaks and have not smelled any anti-freeze.


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