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Chevy Silverado and GMC Sierra Gasoline Engine Problems

399 messages,  Last post on Feb 04, 2013 at 9:24 PM

You are in the Chevrolet Silverado & GMC Sierra Forum.

What is this discussion about? Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, GMC Sierra 2500, Chevrolet Silverado 3500, GMC Sierra 3500, Truck

Messages Page 39 of 40

#380 of 399 Re: Rough Idle problem [rgray1] by altec1950

Apr 07, 2012 (6:54 am)

Replying to: rgray1 (Jan 25, 2007 10:12 am)
Hello:
try doing a compression test wet and dry it should indicate were your miss is coming from and check your fuel pressure and fuel filter

#381 of 399 2001 4.3 auto 4x4 engine operating problem by dcv396

Apr 11, 2012 (2:35 pm)

#382 of 399 2001 4.3 auto 4x4 engine operating problem by dcv396

Apr 11, 2012 (2:35 pm)

My 2001 chevy 1500 silverado has quit a hard problem to find. I hope some one can help. Ok I will do my best to explain it.
 
It starts and runs fine. you can put it in drive and it will auto shift through the gears at up to 4500 RPM ok.
 
the issue is when you are going up a hill or grade for more than 25 seconds under a easy steady load in 2nd, 3rd and 4th gears the engine lights comes on it begine to flash and it sets a code. When this happens number four cylinder missfires and engines runs rough until you remove your foot from the gas peddle for 30 seconds or so. The engine light stops flashing and stays on and truck runs ok. You just can't go over 2000 RPM or up a hill or grade.
 
this has been going on for the three years i have owned this truck and seems to have gotten worse. we have spent many ours and its been at the shop on the scanners many times. Always it says #4 cly missfire.
 
check compression its great, changed and tested plugs, plug wires, coil, crank sensor, intake manifold gaskets and fuel pump. Still the same reaction.
 
Oh ya my truck can plow all day long without one problem. How ever go up a hill or grade for more than 25 seconds under just a easy load and the problem starts everytime. HELP
 
my e-mail is Hotroddvyahoo.com com if needed.
 
Thanks very much

#383 of 399 Re: 2001 4.3 auto 4x4 engine operating problem [dcv396] by dcv396

May 03, 2012 (6:15 am)

Replying to: dcv396 (Apr 11, 2012 2:35 pm)
blow it up

#384 of 399 Re: 2001 4.3 auto 4x4 engine operating problem [dcv396] by jimschev

Jun 28, 2012 (12:56 pm)

Replying to: dcv396 (Apr 11, 2012 2:35 pm)
Hey just curious if you resolved. reason I ask is of course i had the same. mine
is 2001 2 wheel drive silverado. i ended up destroying my cat. Here is what i did. My dealer told me to buy some Techron and add to the tank a few times and buy gas from a top station in my case i got shell gas. Then bought a big can of gunk carb cleaner and took off the air cover and sprayed the throttle body with no less than half the can. This resolved my issue and i do this once a yr or so.

#385 of 399 Re: 5.7 L Vortec bogs after warm-up [obyone] by sorrylew

Jul 23, 2012 (6:17 pm)

Replying to: obyone (Dec 15, 2009 12:09 pm)
Forget the throttle position sensor... have had the same truck for 10 years... tps has been changed two times... doesn't work.... at one point I finally bought Delco cap n rotor and plugs.... problem solved for about six months..... I have also been through a new transmission and have had it rebuilt two times.
 
I love this truck, but it has given me problems on and off since I have had it.... it started lurching again last week.... the transmission is gonna go any day now... probably on the way to work. I'm not spending any more money on this truck. GOOD LUCK!

#386 of 399 Active Fuel Management Problems by rem308

Oct 11, 2012 (5:14 am)

My 2008 1500 pickup started running very very rough all of a sudden. I went to the closest mechanic I could find in a very small town. We don't have a GM dealer. He told me GM is having all kinds of problems with the 2007 and 2008 1500 5.3 engines. Fuel mileage and oil consumption is the smallest of the problem.
Luckily, he owned a Device that read codes he got from Napa. It showed the number 6 cylinder was bad and an O2 sensor.
He put in all new plugs, new plug wires and one O2 sensor. He took it for a test drive and within two miles it was it was doing the same thing. The Stablizer and traction control light came on and also the check engine light as it had for me when it started running very very rough. In my case, it was the number 6 plug. Three different GM mechanics at three different dealerships told me that it mostly affects the plugs on the right bank, and can affect any of those plugs, one told me that he had seen it on the number 7 plug twice.
GM is well aware, as well as their service depts since GM has issued bulletins to the dealers regarding this issue. These bulletins are not for the public.
What happens is the fuel mgt system shuts off the fuel to the right bank and the lifters won't lift the valves for lubrication. Then, the lifter fails, the roller for example breaks off, the lifter slides inside itself, etc. as a consequence it wears the lobe off the camshaft, then destroys the camshaft. Replacing the bad lifter and camshaft will not solve the problem, maybe temporially, but not for the long term.
In my case, my pickup went out of warranty, GM refused to fix the problem. If you are having any issue with oil consumption, bad fuel mileage, running rough; RUN DON'T WALK TO YOUR NEAREST GM DEALER ESPECIALLY IF YOU ARE UNDER THE 100,000 MILES AND DEMAND A NEW ENGINE.
Repairing the engine does not work. I was told by one mechanic he saw an engine repaired with a new lifter, etc. and a few thousand miles later, he had the same problem and ended up buying a new engine.
The only thing to do is get a new engine. Guess what? GM now has their fuel mgt. system on the 2013 2500's and as I understand it on the 3500's also.
It looks like I'll be buying a ford sooner than later. We can thank California and the EPA for all this crap the manufacturers have to put on vehicles these days.
However, it really pisses me off with service managers and a district manager lies to me about the problem.
WHATEVER YOU DO, DO NOT LET GM REPAIR THE ENGINE. I BELIEVE, IT WILL COME BACK TO HAUNT YOU.

#387 of 399 Re: Active Fuel Management Problems [rem308] by gmcustsvcsarah

Oct 11, 2012 (8:07 am)

Replying to: rem308 (Oct 11, 2012 5:14 am)
Good morning rem308,
 
We see that you've worked with multiple dealerships on this concern with your engine; did you ever have a Service Request open at any point regarding this concern? Please forward that reference number (71-**********) or the last 8 digits of your VIN, along with any additional details you wish to include, to socialmediagm.com and we will check into this to see if there's anything further we can do.
 
Sarah, GM Customer Service

#388 of 399 help by rafacutter

Oct 16, 2012 (2:46 pm)

Hello my name is Rafael and I have same problem with my truck except for my engine is a vortec 4.3 and I been changing distribuitor cap, rotor ,sparks plugs, fuel filter and last year brand new fuel pump, i'm not a car guy, so i don't have a lot of experience,so my question is where is located the engine temperature sensor(checking on autozone website is showing 4 different sensors not sure witch one it is)
 
please any advise

#389 of 399 Re: help [rafacutter] by jimschev

Oct 17, 2012 (9:27 am)

Replying to: rafacutter (Oct 16, 2012 2:46 pm)
Rafael, try this first -- buy 4 bottles of Techron fuel additive and use accord to directions - also buy 2 cans of Gunk carb cleaner. Remove your your air cleaner cover and spray the throttle body with half the can at a time--open and close the throttle while spraying. You will have a bit of a hard time starting the truck after but don't worry it will start. Do this a few times and you will see a difference. The cap and rotor are very important too on the 4.3 liter-- so best to get the oem. Also better to use the top tier gas. You can search for the stations near you that have it.

Messages Page 39 of 40

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