GRiSO ghetto
Would you like to react to this message? Create an account in a few clicks or log in to continue.


12425 - Established June, 2013 - all GRiSO, all the time...
 
HomeRegisterLog in
 

 Lack of power/Discolored muffler

Go down 
AuthorMessage
drburt
Squinternotto
Squinternotto
drburt

Posts : 7
Join date : 2020-08-23

Lack of power/Discolored muffler Empty
PostSubject: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Sun Apr 11, 2021 4:32 pm

Hello all! 2015 1200 SE with 3800 miles. Beetle map. Stock muffler.

Started my GRiSO today in 80deg Fahrenheit outside temp.
Started easy enough, gunned it a little, it died, it didn't want to start again (turned over, but kinda like a flooded car, not catching).
Got it started again, but it was low on power.
Rode it around about 10 city miles to see if it would snap out of it.
It did not come back to normal power.
I started smelling an unfamiliar odor like something getting hot.
Pretty sure it was the exhaust/muffler getting hot for some reason.
The muffler has turned from its normal brushed silver to a light golden brown (this is scary).

I boogered up one of the plug caps when I did a valve adjust last fall, wrapped it in tape and it seemed alright.
Hooked up GuzziDiag today and there are no codes.

Besides telling me to replace the caps (on order), anything else to keep me from damaging my engine?
Golden muffler a telltale sign of something in particular?

Thanks for being here!!
Brent

[You must be registered and logged in to see this image.][/url]
[You must be registered and logged in to see this image.]
Back to top Go down
Pete Roper
GRiSO Capo
GRiSO Capo
Pete Roper

Posts : 8093
Join date : 2013-05-29
Age : 64

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Sun Apr 11, 2021 5:04 pm

Classic sign of the spark earthing to the head/rocker cover. The heat is due to the fuel that isn't burning in the combustion chamber igniting in the catalytic converter, hence the pipe discolouration. Time to swap the plug caps for SB05E or F depending which electrode top you have on your plugs.

drburt likes this post

Back to top Go down
drburt
Squinternotto
Squinternotto
drburt

Posts : 7
Join date : 2020-08-23

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Sun Apr 11, 2021 7:36 pm

Thanks Pete! I'll report back after replacing plug caps.
Need to change the oil in case it got fuel in it?
I smelled the dipstick and it just smelled like oil.
Anything else to address because of the fuel not burning in the combustion chamber?
Thanks!
Back to top Go down
Pete Roper
GRiSO Capo
GRiSO Capo
Pete Roper

Posts : 8093
Join date : 2013-05-29
Age : 64

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Sun Apr 11, 2021 8:05 pm

The biggest risk is that the cat has become clogged/melted. You'll soon notice because it will turn into a horrible, gutless piece of shit. I doubt whether the oil will of suffered in such a short period of running.
Back to top Go down
drburt
Squinternotto
Squinternotto
drburt

Posts : 7
Join date : 2020-08-23

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Sat Apr 17, 2021 5:51 pm

Yay! New plug boots and plugs got it running nicely again.
It passed the catalytic "horrible, gutless piece of" test today. LOL
Is there a more sophisticated way to make sure the exhaust system is fine from a shadetree mechanic's garage?
Thanks!

Steak likes this post

Back to top Go down
beetle
GRiSO Capo
GRiSO Capo
beetle

Posts : 8525
Join date : 2013-09-30

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Sat Apr 17, 2021 6:06 pm


Not really, unless you forensically examine the cat.

If it rides OK, then it probably is.




drburt likes this post

Back to top Go down
https://www.griso.org
Gaucho
GRiSO Capo
GRiSO Capo
Gaucho

Posts : 14
Join date : 2018-05-02

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Mon Apr 19, 2021 8:53 am

If you want to get really fancy, you'll need one of this:
[You must be registered and logged in to see this image.]
It's an exhaust back pressure gauge. You remove the O2 sensor and install it. At idle pressure shouldn't exceed 1 1/4 psi. At 2000 rpm not to exceed 3 psi.
If the exhaust didn't get red hot you are probably are fine. The cat will glow with unburned fuel if the situation is extreme. You'll feel a noticeable drop in power when a cat melts. It basically becomes like somebody stuck a potato on your tail pipe.
Good excuse to get a slip on.  Very Happy
Gaucho
Back to top Go down
Steak
L'Innominato
L'Innominato
Steak

Posts : 2905
Join date : 2013-05-28
Age : 56

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Mon Apr 19, 2021 11:00 am

[You must be registered and logged in to see this image.]

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
[You must be registered and logged in to see this image.]

2012 MOTO GUZZI GRiSO 1200SE

2013 MOTO GUZZI STELVIO 1200NTX - Orange Blossom Special
Back to top Go down
https://www.grisoghetto.com
beetle
GRiSO Capo
GRiSO Capo
beetle

Posts : 8525
Join date : 2013-09-30

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Mon Apr 19, 2021 2:02 pm

[You must be registered and logged in to see this image.]


[You must be registered and logged in to see this image.]



Back to top Go down
https://www.griso.org
Pete Roper
GRiSO Capo
GRiSO Capo
Pete Roper

Posts : 8093
Join date : 2013-05-29
Age : 64

Lack of power/Discolored muffler Empty
PostSubject: Re: Lack of power/Discolored muffler   Lack of power/Discolored muffler Icon_minitime1Mon Apr 19, 2021 2:06 pm

Nearly three weeks late.......😂
Back to top Go down
 
Lack of power/Discolored muffler
Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
GRiSO ghetto :: The Ghetto :: GRiSOLOGY-
Jump to: