JeepForum.com

JeepForum.com (https://www.jeepforum.com/forum/)
-   WJ Grand Cherokee Forum (https://www.jeepforum.com/forum/f310/)
-   -   Carbon marks on ground from exhaust (https://www.jeepforum.com/forum/f310/carbon-marks-ground-exhaust-4434963/)

three_jeeps 06-09-2021 12:47 PM

Carbon marks on ground from exhaust
 
Over the last few months, have noticed carbon marks on the ground after starting the Jeep - 4.7L standard output, 140K miles. Carbon seems to be there after startup but could also appear under easy acceleration.
Engine seems to be running normally.
Any suggestions on the most likely causes of this situation?
Am thinking of adding a can of seafoam to the gas, and a quart of Marvel Mystery oil into the oil to help 'clean' out any buildup.
Probably go out on highway a do a number of 0-80 MPH with accelerator floored to help blow out the carbon.
That may cure it temporary but probably wont address the cause, which is what I am after..
Thanks
J

WJ60 06-10-2021 08:11 PM

I would think you should be able to pull codes to get you started.

Delta0 06-11-2021 02:25 AM

Condensation in your exhaust pipe washing soot out?

Bigrigr 06-11-2021 08:13 PM

I think delta0 has nailed it. Just needs a good Italian tuneup and some freeway miles


The time now is 11:38 PM.

Powered by vBulletin Version 3.8.8
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.