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.
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.
SOURCE: Chevy truck '02 surges between 45 and 55 mph
you should change the tps( throtal position sensor) this can cause that problem
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
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,
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,
Testimonial: "Thank you, we will start there."
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