Ruff Idle

[tnt3]

I have an 04 chev silverado 69000kms. I ran a check for errors and the code I recived was PO 171 Fuel Trim Bank 1 System too Lean the other code was .P0300

Random/Multiple Cylinder Misfire Detected. Can some one explain this to me and what I should do it sounded like a vacum leak at the top of the intake close to fire wall.

[tnt3]

What 39 pers review and not replys

[Schmids5.3l]

I'll try to dig up some info I posted about the P0300 code.

[Schmids5.3l]

Here it is, last post.

 

http://www.gm-trucks.com/forums/index.php?...33&hl=P0300

 

 

You wouldn't happen to know which cylinder or bank is misfiring would you?

[Draenor]

Check the injectors and the rail on the driver side. Which Cylinders are misfiring?

[tnt3]

Thanks for anwsering I believe it says bank 1 does that help?

Check the injectors and the rail on the driver side. Which Cylinders are misfiring?

[tigerbait]

my 04 does the same thing w/ 44K miles....no codes though

 

I would check the rails and connections.

[tnt3]

Well

I took my truck to Chevrolet dealer in my area adn they scanned the Computer. Replaced the front left O2 sencer adn recalibrated teh other 3 sencers as per GM update. Cost $436.90 Total. 1 Hrs diagnostic $75 O2 Senser $214 1 Hr to instale dn calibrate $75 plus taxes to the man. Truck is working fine so far no I will change oil incase gas washed into the cylinders. Hope this help any one else.

my 04 does the same thing w/ 44K miles....no codes though

 

I would check the rails and connections.

[pm26]

To help prevent future oxygen SENSOR contamination, avoid no name brand cheap gas. Stay with name brand stations. I would try to avoid all gas containing ethanol, even less than 10% if you can. Ethanol contaminates oxygen sensors, unless they are specifically designed for it.

[tnt3]

I run nothing but supreme gas in my truck the highest octane 91%we can get in Canada