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CF Veteran
Joined: Oct 2011
Posts: 2,613
Likes: 0
From: Summerville, South Carolina
Year: 99
Model: Cherokee
Engine: 4.0
When I start my jeep it revs all the way up to 2xxx RPMs, and when I drive it acts like it wants to keep goin and it's hard to brake and stop. Please help fast, used to only happen sometimes now it won't stop
CF Veteran
Joined: Apr 2011
Posts: 1,146
Likes: 0
From: Clayton, NC
Year: 1988
Model: Cherokee
Engine: 4.6L I6 Stroker with port matched +99 intake and 62mm TB
Just Seafoamed my engine (4.0L) with the spray that goes into the TB... Followed the instructions to a tee and no smoke. Drove like a bat-out-of-hell and still nothing. Is my 25 year old engine just clean as I'd like to think or just that stubborn? Anybody else had that happen after Seafoaming?
Edit: I also put liquid Seafoam in the gas tank, if that makes a difference...
Edit: I also put liquid Seafoam in the gas tank, if that makes a difference...
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Originally Posted by onlyinajeep726
Just Seafoamed my engine (4.0L) with the spray that goes into the TB... Followed the instructions to a tee and no smoke. Drove like a bat-out-of-hell and still nothing. Is my 25 year old engine just clean as I'd like to think or just that stubborn? Anybody else had that happen after Seafoaming?
Edit: I also put liquid Seafoam in the gas tank, if that makes a difference...
Edit: I also put liquid Seafoam in the gas tank, if that makes a difference...
CF Veteran
Joined: Oct 2011
Posts: 2,613
Likes: 0
From: Summerville, South Carolina
Year: 99
Model: Cherokee
Engine: 4.0
Originally Posted by zombie jeep101
When I start my jeep it revs all the way up to 2xxx RPMs, and when I drive it acts like it wants to keep goin and it's hard to brake and stop. Please help fast, used to only happen sometimes now it won't stop
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Originally Posted by 94XjSport94
I thought they were all 30 spline?
Senior Member
Joined: Aug 2012
Posts: 792
Likes: 0
Originally Posted by sycoglitch
If you only put it in te TB you won't get a smoke show. You have to run it through the brake booster vac line and it's the seafoam white can not the deep creep one you have to use. Click the link on my sig
CF Veteran
Joined: Oct 2011
Posts: 2,613
Likes: 0
From: Summerville, South Carolina
Year: 99
Model: Cherokee
Engine: 4.0
Originally Posted by greenxj21
Sounds like a throttle positioning sensor problem to me. Check that.
Edit: oh nvm I did the iac, you're probably right