Update on the seafoam
Registered Users
Joined: Dec 2009
Posts: 1,859
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From: Everett, WA
Year: 1992
Model: Cherokee
Engine: 4.0
Senior Member
Joined: Jun 2009
Posts: 842
Likes: 2
From: Guilderland NY
Year: 2001
Model: Cherokee
Engine: 4.0L I6 w/ K&N and bored TB
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CF Veteran
Joined: Jun 2010
Posts: 2,117
Likes: 3
From: Ohio
Year: 1998
Model: Cherokee
Engine: 4.0 stock
I tried it directly in the intake... it did make a ton of smoke but shortly after the updraft O2 sensor went out. I thought it coincidence.... until the downdraft O2 sensor went out a day later. It makes sense it is probably really hard on O2 sensors. For fuel injected engines.... I won't do it again.
Member
Joined: May 2010
Posts: 155
Likes: 0
From: southlake, TX
Year: 1996 Sport
Model: Cherokee
Engine: 4.0L H.O.
use crc tb cleaner in your intake next time...it'll do the job and cook off before hitting exhaust manifold and not damage sensors....you can hook up a 1/4" tube to the vacuum nipple on the side of the intake manifold below the tb.....start engine (don't plug up hose, it'll stall!) and spray down tube...it'll clean the whole intake manifold below the tb!
Last edited by kbad; Jun 21, 2010 at 09:13 AM.
CF Veteran
Joined: Jun 2010
Posts: 2,117
Likes: 3
From: Ohio
Year: 1998
Model: Cherokee
Engine: 4.0 stock
use crc tb cleaner in your intake next time...it'll do the job and cook off before hitting exhaust manifold and not damage sensors....you can hook up a 1/4" tube to the vacuum nipple on the side of the intake manifold below the tb.....start engine (don't plug up hose, it'll stall!) and spray down tube...it'll clean the whole intake manifold below the tb!
This?

Cool I will try it if I need to again. I use Lukas fuel based cleaner every month now, haven't had any problems.
Member
Joined: May 2010
Posts: 155
Likes: 0
From: southlake, TX
Year: 1996 Sport
Model: Cherokee
Engine: 4.0L H.O.
that's it, buy two cans....make sure you don't flood it....and some heavy duty injector cleaner...(seafoam is good and general, injector cleaner is specific....i pick up a six pack at costco and use one bottle before every fillup...on the way to the pump)....at your local auto shop.
...if you want/can/have time/feel like it/etc....take the tb off (you can pick up a bored TB and do a core exchange...then the openings will match up... 68mm vs. 62/63mm...makes a big difference!!!) and clean it really good with the crc...you can remove the sensors and clean those too!....however, the above should be good enough for you to see a difference in performance, albeit minimal but effective.
...if you want/can/have time/feel like it/etc....take the tb off (you can pick up a bored TB and do a core exchange...then the openings will match up... 68mm vs. 62/63mm...makes a big difference!!!) and clean it really good with the crc...you can remove the sensors and clean those too!....however, the above should be good enough for you to see a difference in performance, albeit minimal but effective.
Last edited by kbad; Jun 21, 2010 at 09:34 AM.
CF Veteran
Joined: Jun 2010
Posts: 2,117
Likes: 3
From: Ohio
Year: 1998
Model: Cherokee
Engine: 4.0 stock
that's it, buy two cans....make sure you don't flood it....and some heavy duty injector cleaner...(seafoam is good and general, injector cleaner is specific....i pick up a six pack at costco and use one bottle before every fillup...on the way to the pump)....at your local auto shop.
...if you want/can/have time/feel like it/etc....take the tb off (you can pick up a bored TB and do a core exchange...then the openings will match up... 68mm vs. 62/63mm...makes a big difference!!!) and clean it really good with the crc...you can remove the sensors and clean those too!....however, the above should be good enough for you to see a difference in performance, albeit minimal but effective.
...if you want/can/have time/feel like it/etc....take the tb off (you can pick up a bored TB and do a core exchange...then the openings will match up... 68mm vs. 62/63mm...makes a big difference!!!) and clean it really good with the crc...you can remove the sensors and clean those too!....however, the above should be good enough for you to see a difference in performance, albeit minimal but effective.
For cleaning the TB I did that when I replaced the TPS. It wasn't really that bad I just used carb cleaner. I am pretty religious about the FI cleaner now and I have noticed (per records) my MPG improved by 2 which is really big considering it was from getting rid of crap in the engine!
Member
Joined: Jun 2010
Posts: 113
Likes: 1
From: Columbus, OH
Year: 1996
Model: Cherokee
Engine: 4.0 of course
use crc tb cleaner in your intake next time...it'll do the job and cook off before hitting exhaust manifold and not damage sensors....you can hook up a 1/4" tube to the vacuum nipple on the side of the intake manifold below the tb.....start engine (don't plug up hose, it'll stall!) and spray down tube...it'll clean the whole intake manifold below the tb!
Looking to clean out my engine also, thanks for this tip
Senior Member
Joined: May 2010
Posts: 889
Likes: 2
From: Detroit, MI
Year: 1994
Model: Cherokee
Engine: 4.0
I had a mildly rough idle so I put a can of Seafoam in my full gas tank. 120 miles on it...seems like it smoothed out a little bit but, really, hard to tell. Not sure I'd spend the $10 again.


