suggestions on exhaust smell in car

[HT413]

I hear ya, and that's a good point with the pickup truck rear window. I'm running a fiberglass deck lid that doesn't seal for a damn (huge gaps where the deck lid turns down) and I don't have a problem at all. Guess I'm lucky.

 

[texas69bee]

Yep, as much as I hate to say it, Cranky & RC your examples made me a believer.

 

[Cranky]

I hear ya, and that's a good point with the pickup truck rear window. I'm running a fiberglass deck lid that doesn't seal for a damn (huge gaps where the deck lid turns down) and I don't have a problem at all. Guess I'm lucky.

Do you have a good partition between your trunk and passenger compartment? If so, that's probably why you're not experiencing any problem. This is another reason why racing rules require one when the battery and fuel tank is located in the trunk.

 

[lewtot184]

i've read thru these replys and can see merit to them, but sealing all the leaks may not cure a poor tune on the engine. i'd look at leaks and tune.

 

[440fish]

Update

Also after checking tail light gaskets go around the trunk seal with a dollar bill , close the lid on it every few inchs and see if there is some drag to get it pulled out.
Exhaust will come into the trunk at road speed if there are openings / access for it.
I hauled a small wood chair home from a car show { better half was shopping } anyhow padded the top were it met the trunk lid and used a cable tie to hold the lid near closed , prob 2 inchs from closeing, Got out on the road and holy crap it was fumes bad, rolling the windows down did make it worse, my exhaust is in good shape and exits the rear at the bumper.

If the car ever had qts put on check the inner wheel tubs to qt panel fit and seal up also.

Winner Winner...

Upon inspection i was able to slide an envelope right into the trunk along most of the back edge of the trunk lid. I guess the weatherstripping has lost its elasticity (or is of the wrong height) and it is allowing the exhaust fumes unto the trunk. Additionally i can see residue from the leaded fuel on the lip past the weatherstripping which is the smoking gun evidence.

I quickly cut a towel into strips and then carefully laid it on the seal. then i closed the lid and took her for a spin.... guess what.. No more stink. Immediately better.

to answer some of the comments...

My engine likes / runs better with a percentage of 110 in the tank and I can sense the change in throttle response immediately. This engine was designed to run on the upper range of 93 octane.

It has been tuned by a professional engine builder that specialized in mopars with an a/f meter. While it is not perfect yet (ran out of time with the weather) It is not piggy rich.

The exhaust is all new and completely leak free.

Any suggestions on who offers good quality weatherstripping are welcome.


Hopefully this discussion will help someone else out in a similar situation.

 

[1969CoronetR/T]

I think I got mine from Steele Rubber Products.

 

[barbee6043]

fact is, these older engines/systems do not generally have a complete burn. good gas ( where? ha) and the best air/fuel mixture obtainable...... part of the answer.
or course, fact is if ... IF no rebuild of a 40-50 yr old engine, the rubber valve seals are long gone..... that can be a lot of it!????

 

[slepr1]

Hopefully this discussion will help someone else out in a similar situation.

...and it did. My buddy has a a-body 71 Demon and his wife doesn't like cruising because of the smell. I'll have to let him know what to look for.