engine fumes
Thread Starter
Intermediate
Joined: Dec 2001
Posts: 46
Likes: 0
From: greenbay wi
engine fumes
My Mechanic recently tuned my base 72 conv. 350. He changed the rochester carb with an identical one to see if He could get it to stop from running rich at idle but it did not change. Other than that everything checked out O.K. Plugs, points, etc. sounds and accelerates great. My question and his is were these engines noted for running more rich back then? Can the mufflers or grade of gas cause this. Thanks for any input.
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
Did he check fuel pressure?
Also, he should hook up a CO meter and see just how rich it really is. Without catalytic converters the exhaust will smell pretty bad. There's a sticker in the eng comp stating the amount of CO you should have. Probably 1% or so.
Also, he should hook up a CO meter and see just how rich it really is. Without catalytic converters the exhaust will smell pretty bad. There's a sticker in the eng comp stating the amount of CO you should have. Probably 1% or so.
Instructor
Joined: Apr 2004
Posts: 124
Likes: 0
From: Grapevine Tx
engine fumes
My '79 had a smell strong gas fumes during idle and right after engine shutdown and several here suggested I change the vapor cannister.
I did and that solved my problem.
If the engine doesn't emit black smoke during acceleration I would think the carb was set about right.........
I did and that solved my problem.
If the engine doesn't emit black smoke during acceleration I would think the carb was set about right.........
