Clifton

Sup guys, few months back I had a Walker quiet flow muffler installed. My ******* didn't realize it's a non reversable muffler but my car sounded quieter and no issues. Fast forward to Thanksgiving I have a CEL and traction service light. The dealer diaged it and they say P0300 for low combustion on Cylinder 1 (shouldve been 301 lol) assuming sticky or bent valve(s). I did the ol paper near the tailpipe and was flapping somewhat not too severe. I wonder if my non reversable muffler have anything to to do with it, like choking? Thanks.

kzak104

iTrader: (1)

low combustion or low compression. low combustion could be shitty plugs coilpacks or injector.

Snail_SS

iTrader: (3)

P0300 is a random misfire

Spawne32

iTrader: (1)

I doubt you would have been able to mount the walker muffler in reverse, I dont think it would have fit, unless it was a universal mount. P0301 is cylinder #1 misfire, not cylinder 1 low compression. They would have had to have done a compression check to confirm low compression. Likely just a bad coil on that cylinder, or plugs or injectors.

Clifton

I mean low "compression" on cylinder 1 sorry. The muffler is a universal center offset but the inlet/outlet's the other way around. Here's hopin it's the coil, plug or injector.

ItalianJoe1

iTrader: (10)

There's no way your muffler is causing a misfire, they need to diagnose the actual cause.

turbocharged717

Mufflers causing misfires? Wow...

Viperoni

Maybe if it was completely collapsed internally.... maybe.
Like everyone else, coil/plug/injector most likely.

slapbetcommissioner

iTrader: (3)

Not that funny if it caused excessive back pressure...

Spawne32

iTrader: (1)

The way most of the chambered mufflers are designed such as the walker, all it would really do is effect the sound, not the flow.

T-fog

Cars are so advanced now they don't need to operate with back pressure believe that or not, Also If you have back pressure you have a restriction in the exhaust system and you are losing power and in this case you could be damaging the engine, But most likely would wreak or blow your header gasket or exhaust gasket Something weak like that if your back pressure was excessive.

Back to your main statement a sticking valve could be possible, These things are brutal for carbon deposits. What is your km/mi?

Also here is something I always think about and even tell people/customers as well.

In Automotive there is a higher potential for something electrical to go wrong.
For example: If something electrical or mechanical goes wrong, you relying on a electrical system to tell you what went wrong.

So like people stated above I would look into plugs and coils first and go from there.



I hope this helps and keep us posted