Thanks for the update. It is a bit common to have issues with that long
intake.

Just FYI, the torquing should 'start' in the center and spiral out to
the outside bolts, not alternate inside to outside. This will make it
stay put better.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

juanjlopez@gmail.com wrote:
> I should have taken L.W's advice about loosening and wiggling the
> intake. Instead I decided to start checking each screw by tightening
> each one to make sure it was at the correct setting. Well, it turns
> out that the intake was not seated properly. There are 2 holes on each
> side of the intake that are suppose to line up with engine. One of
> them was not lined up and as I tighted the screw (since it was not
> torqued to the correct amount) it broke of a small pieace of the
> intake. In any case that meant that whole side was loose. So I began
> to tighten each bolt again, and when over them several times. Turned
> on the Jeep, and it was back to its normal idle speed :). I can live
> with the small chip on the intake, as it appears to be running ok. I
> plan on driving it on short drives, and re-check the bolts in a couple
> of days. Thanks for everyones suggestions.
>

 

Thanks for the update. It is a bit common to have issues with that long
intake.

Just FYI, the torquing should 'start' in the center and spiral out to
the outside bolts, not alternate inside to outside. This will make it
stay put better.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

juanjlopez@gmail.com wrote:
> I should have taken L.W's advice about loosening and wiggling the
> intake. Instead I decided to start checking each screw by tightening
> each one to make sure it was at the correct setting. Well, it turns
> out that the intake was not seated properly. There are 2 holes on each
> side of the intake that are suppose to line up with engine. One of
> them was not lined up and as I tighted the screw (since it was not
> torqued to the correct amount) it broke of a small pieace of the
> intake. In any case that meant that whole side was loose. So I began
> to tighten each bolt again, and when over them several times. Turned
> on the Jeep, and it was back to its normal idle speed :). I can live
> with the small chip on the intake, as it appears to be running ok. I
> plan on driving it on short drives, and re-check the bolts in a couple
> of days. Thanks for everyones suggestions.
>

 

> Well, it turns out that the intake was not seated properly.

Effectively bypassing the throttle and making it a non-throttle.

 

> Well, it turns out that the intake was not seated properly.

Effectively bypassing the throttle and making it a non-throttle.

 

> Well, it turns out that the intake was not seated properly.

Effectively bypassing the throttle and making it a non-throttle.

 

juanjlopez@gmail.com wrote:


> I re-tightent the bolts according to the sequence suggested (center
> bolts first and then the outer). I tried to turn the jeep on, and the
> engine just rev'ed really fast to redline.
>

In your worry about subtle things, never overlook the obvious. Did you
re-connect the throttle return spring and throttle cable correctly?

 

juanjlopez@gmail.com wrote:


> I re-tightent the bolts according to the sequence suggested (center
> bolts first and then the outer). I tried to turn the jeep on, and the
> engine just rev'ed really fast to redline.
>

In your worry about subtle things, never overlook the obvious. Did you
re-connect the throttle return spring and throttle cable correctly?

 

juanjlopez@gmail.com wrote:


> I re-tightent the bolts according to the sequence suggested (center
> bolts first and then the outer). I tried to turn the jeep on, and the
> engine just rev'ed really fast to redline.
>

In your worry about subtle things, never overlook the obvious. Did you
re-connect the throttle return spring and throttle cable correctly?

 

bet you did not get inatke manifiold seated on head correctly and now have
a vac. leak there

Scott wrote:

> Sounds as though you have a throttle connection binding or improperly
> connected. My guess is the throttle is stuck full tilt.
> Scott
>
> On 4 Apr 2007 18:16:38 -0700, juanjlopez@gmail.com wrote:
>
> >I replaced my cracked exhaust manifold on my 99 Jeep Wrangler 4.0L
> >(I-6). Note that this is really probably the 2nd time I try such a
> >large job (at least I usually just deal with oil changes). This
> >required the removal of the intake manifold also (because both intake
> >and exhaust share the same gasket). I made sure I removed everything
> >carefully. I disconnected 2 electrical connections and about 6 or so
> >hoses, and of course the fuel line.
> >
> >I re-tightent the bolts according to the sequence suggested (center
> >bolts first and then the outer). I tried to turn the jeep on, and the
> >engine just rev'ed really fast to redline. I immediately turned it off
> >(the first time probably let it run for 5 seconds). I double and
> >tripled checked the vacuum houses and all the connections I touched
> >during the replacement of the exahust manifold. Note that I did not
> >replace any hoses, except for a connector from the air intake that I
> >broke while trying to remove it. I still need to check to make sure I
> >torqued all the bolts to the correct amount. I tried turning it on
> >about 6-8 more times to see if It would eventually come to a normal
> >idle, but it never did. I actually did not let it run more than 1-2
> >seconds since every time I turned it on, it revs so fast, almost as if
> >I were pressing on the accelator. I did checked the throttle, and its
> >not stuck.
> >
> >My question is if a leak in the gasket or a vacuum hose will cause
> >this problem? Or what other things could I have screwed up while
> >replacing the exhuast manifold? Any suggestions I can try would be
> >very helpful.
> >
> >-Juan

 

bet you did not get inatke manifiold seated on head correctly and now have
a vac. leak there

Scott wrote:

> Sounds as though you have a throttle connection binding or improperly
> connected. My guess is the throttle is stuck full tilt.
> Scott
>
> On 4 Apr 2007 18:16:38 -0700, juanjlopez@gmail.com wrote:
>
> >I replaced my cracked exhaust manifold on my 99 Jeep Wrangler 4.0L
> >(I-6). Note that this is really probably the 2nd time I try such a
> >large job (at least I usually just deal with oil changes). This
> >required the removal of the intake manifold also (because both intake
> >and exhaust share the same gasket). I made sure I removed everything
> >carefully. I disconnected 2 electrical connections and about 6 or so
> >hoses, and of course the fuel line.
> >
> >I re-tightent the bolts according to the sequence suggested (center
> >bolts first and then the outer). I tried to turn the jeep on, and the
> >engine just rev'ed really fast to redline. I immediately turned it off
> >(the first time probably let it run for 5 seconds). I double and
> >tripled checked the vacuum houses and all the connections I touched
> >during the replacement of the exahust manifold. Note that I did not
> >replace any hoses, except for a connector from the air intake that I
> >broke while trying to remove it. I still need to check to make sure I
> >torqued all the bolts to the correct amount. I tried turning it on
> >about 6-8 more times to see if It would eventually come to a normal
> >idle, but it never did. I actually did not let it run more than 1-2
> >seconds since every time I turned it on, it revs so fast, almost as if
> >I were pressing on the accelator. I did checked the throttle, and its
> >not stuck.
> >
> >My question is if a leak in the gasket or a vacuum hose will cause
> >this problem? Or what other things could I have screwed up while
> >replacing the exhuast manifold? Any suggestions I can try would be
> >very helpful.
> >
> >-Juan