TylerWalker
4/18/2008 8:46:37 AM
ok i've got an 04 1500 5.3 v8. heres whats wrong.. rough idle, buzzing noise comin from exauhst at 2000rpm(65mph) only when i'm on the gas. poor gas milage. my ces readings are as follows. 1)random misfire 2) 02 sensor bank 2. 3) cat running inneficiently bank 2. 4) 02 sensor-system running too lean, bank 2.
I changed out my plugs and wire 3 weeks ago thinking it would fix the idle, it helped but didnt fix, now the 4 plugs on the left side of my engine when looking at the engine are all fouled already.
Is my cat bad? causing the 02 to read bad, causing my engine to foul out those plugs? i'm helpless here people!
Any ideas?!?!
Thanks!!!!!!!!!!!!!!!!!
northey87
4/18/2008 9:17:32 AM
Welcome to the forum!!! How many miles are on the truck? and how bed is the gas mileage?
ZX1100F1
4/18/2008 9:21:20 AM
Leaking intake manifold gasket, but this may not be all of your problem.
TylerWalker
4/18/2008 9:51:42 AM
What problem would the leaking manifold gasket be connected to?
06chevy5.3
4/19/2008 9:48:14 AM
sounds like a bad cat to me, had one in the shop 2 days ago with the same problem,
ehhget
4/19/2008 7:44:25 PM
thats a nightmare that is intersting.
06 chevy why would the cat cause that, by causing the 02 to call for to much fuel? but why just one side of the engine?
maybe it could be the 02 on that side of the engine before the cat sending to much fuel to those injectors
TylerWalker
4/21/2008 5:44:22 AM
ya it is a nightmare. i'm frustrated! but the code from the ses light said it was #2 o2 sensor on bank two. my cat is making a buzzing noise as if a baffold broke lose inside of it and is buzzing from the exhaust.. so i'm pretty sure my cat is bad..
ehhget
4/21/2008 9:43:08 PM
Thats to many problems to figure out without having it tested. Spend the 95 bucks and find out whats up before you go nuts.
TylerWalker
4/22/2008 5:43:42 AM
so it turns out my act is covered under warranty still :) so its at the dealership getting fixed for free... well untill they change the 02 sensor and the fuel filter ;) lol thanks for the wisdom all
ZX1100F1
4/22/2008 8:37:41 AM
If the cat has failed while still under warranty then something has caused this failure and while replacing the converter may make the engine run better you will probably still have the original problem that caused the cat to fail in the first place.
The most common culprit is a leaky intake manifold gasket.
