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Topic: Smelly exhaust

in Forum: C3 Fuel, Emission Control, and Exhaust Systems

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Smelly exhaust (1/2)
6/4/16 9:28pm

Sabrejet
Former Member
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, - Canada

Vette(s):
Previously owned a 1975; white with blue interior. Now own a 1980; white with blue interior.

Joined: 7/5/2015
Posts: 6

1980. Straight pipes to Magnaflow mufflers at rear. Sounds great, but the stink is intolerable. Backing it into the garage is 24 hours of exhaust stink. I drove the car for an hour with the t-tops off and I had to stop. The fumes are not coming into the cabin through the floor (no holes) but just out the pipes. What do I need to add to the system? Cats?

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Re: Smelly exhaust (2/2)
6/4/16 10:14pm

Sarge81

Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2379

I would pull a spark plug out first and see if it has a lot of carbon or soot on it. Your carb might be running rich. If it's a nice light tan color then I would say the carb is fine and put a couple free flow cats on it.

My '81 has side pipes on it and I put a cat inline on each side because I couldn't stand the smell of the exhaust.

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GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.

3.54 Dana 44

'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975

Click here to see more pics of my Vette on CarDomain.

Lifetime Member #26

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