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#1 |
Registered User
Join Date: Jun 2009
Location: Hampton Roads VA
Posts: 333
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Exhaust Smell From Only One Exhaust Pipe
So I have been doing some tuning and leaned the carb out a bit. It is running good but I am getting fuel smell from the right exhaust pipe. The left one does not have this smell. What could be going on??
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Brad 72 Blazer CST 350/350/205 ![]() ![]() |
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#2 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust Smell From Only One Exhaust Pipe
Well... You can't lean out your carb by smell . It's done by rpm and vacuum lean to far and you start burning valves . your better to run rich and save your engine .Stop smelling your exhaust it's really not good for you and definetly kills brain cells .
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#3 |
Registered User
Join Date: Jun 2009
Location: Hampton Roads VA
Posts: 333
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Re: Exhaust Smell From Only One Exhaust Pipe
Thank you for your input, but I am not asking how to tune, I am asking what could be causing a fuel smell from only one bank.
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Brad 72 Blazer CST 350/350/205 ![]() ![]() |
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#4 |
Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,270
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Re: Exhaust Smell From Only One Exhaust Pipe
Check your plugs, if you have headers and a thermo gun shoot each tube to find the coldest one then pull that plug or check the wire to the hole. If you don't have a thermo gun [most don't, I use them to check the metal temp to know when I can paint among other things]drip a little water on each tube to see if it bubbles and burns off or not that one is hot is probably ok. The one that doesn't "fry" is where a good place to start looking. To smell as you say probably means as you know it is way fat. I don't mean Phat in the way the kids would say meaning cool either
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#5 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust Smell From Only One Exhaust Pipe
Fouled plug ? burnt wire ? lazy lifter ? worn cam lobe ? improper carb adjustment ? the variables are untold .
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#6 |
Registered User
Join Date: Jun 2009
Location: Hampton Roads VA
Posts: 333
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Re: Exhaust Smell From Only One Exhaust Pipe
I do have a temp gun, I have ram horns and shot all the putputs and they were all around 220 except #6 which was about 320. Pulled the plugs one at a time and engine stumbled with each. Made sure the carb was even lt to rt (same jets, rods and idle screws).
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Brad 72 Blazer CST 350/350/205 ![]() ![]() |
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#7 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Exhaust Smell From Only One Exhaust Pipe
There are still a lot of old style SUN gas engine analysers out there for sale cheap ,easier yet drop an x pipe into your exhaust and everything balances out fast .
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#8 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,638
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Re: Exhaust Smell From Only One Exhaust Pipe
Sticking heat riser valve, forcing most of the exhaust through one pipe?
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#9 |
Registered User
![]() Join Date: Apr 2012
Location: Stillwater, Oklahoma
Posts: 874
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Re: Exhaust Smell From Only One Exhaust Pipe
Could it be a burnt oil smell? Could be getting past a bad ring or valve stem.
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1971 C/10 SWB, 15x8 Rallys, 4.5" X 7" static drop, C-notched, 350/350, 3.73 Posi. .........A 383 and Gear Vendors are on my bucket list. 1972 GMC 4X4 K1500 Survivor - Sold No matter what problems life throws at you, your time on Earth can be incredibly fulfilling and rewarding.....if you just lower your expectations. -Phil Dunphy |
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#10 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,622
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Re: Exhaust Smell From Only One Exhaust Pipe
Look in the carb while it's running. Could be fuel dripping from the booster on only that side.
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#11 |
Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,270
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Re: Exhaust Smell From Only One Exhaust Pipe
The temp gun method I mentioned will not be as effective on a manifold equipped engines because of the construction of the manifold. Hope you get it lined out. Jim
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