Off-Road Forums & Discussion Groups

Off-Road Forums & Discussion Groups (https://forums.off-road.com/forum.php)
-   Jeep-Short Wheelbase (https://forums.off-road.com/jeep-short-wheelbase/)
-   -   Exhaust Backfire? (https://forums.off-road.com/jeep-short-wheelbase/1241-exhaust-backfire.html)

fratt77CJ7 09-30-1999 10:17 AM

Exhaust Backfire?
 
Still having probs w/muffler. Whenever I patch or replace mine I get some backfiring. Bad enough to blow out the patch or bust the muffler. I've given a complete tune-up, reconditioned a head with a bad seat. New intake, exhaust, and head gaskets. Can't figure it out. Does not happen as long as there is a whole in the muffler (no back pressure I guess). It runs fine otherwise, starts right up, no ping/knock. Any ideas? Thanks all.
fratt
"77 304V8, TH400 auto, Qtrac

fratt

CJDave 09-30-1999 10:26 AM

Re: Exhaust Backfire?
 
[img]/wwwthreads_images/icons/crazy.gif[/img] Just a crazy thought, but I suspect that what is happening is that enough air is getting into the system up front that it is allowing for combustion in the header and muffler. By chance is this a 304 with the air pump? And if so, is the diverter valve working? [img]/wwwthreads_images/icons/tongue.gif[/img]

CJDave

fratt77CJ7 09-30-1999 11:07 AM

Re: Exhaust Backfire?
 
Thanks for the info. I'll check tonight. Not sure if it has an air pump. The Jeep is a '77 but not sure if this is the original 304.

fratt


All times are GMT -5. The time now is 08:47 AM.

Powered by vBulletin® Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1994-2009, VerticalScope Inc. // Off Road forums & discussion groups sitemap
side by side | atv | dirtbike | snowmobile | sandsport | competition | land use | Jeep | Toyota | Ford | GM

 
For the best viewing experience please update your browser to Google Chrome