Nothing but trouble with this 88' Renix.
12-15-2013, 10:57 AM
#16
Member
Thread Starter
Join Date: Oct 2012
Location: Springfield, Mo
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
12-15-2013, 01:12 PM
#17
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
12-15-2013, 09:10 PM
#18
Member
Thread Starter
Join Date: Oct 2012
Location: Springfield, Mo
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
12-15-2013, 09:23 PM
#19
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
The grounds for your CTS, TPS, MAP. and IAT should be good then.
Check the line from the throttle body to MAP sensor. It has to be perfect. No splits, cracks, melted parts etc.
Remove your IAT and carefully clean the tip of it.
Check to be sure your intake manifold bolts are snug.
What do your vacuum lines all over the engine look like?
Check the line from the throttle body to MAP sensor. It has to be perfect. No splits, cracks, melted parts etc.
Remove your IAT and carefully clean the tip of it.
Check to be sure your intake manifold bolts are snug.
What do your vacuum lines all over the engine look like?
12-15-2013, 09:54 PM
#20
Member
Thread Starter
Join Date: Oct 2012
Location: Springfield, Mo
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
The grounds for your CTS, TPS, MAP. and IAT should be good then.
Check the line from the throttle body to MAP sensor. It has to be perfect. No splits, cracks, melted parts etc.
Remove your IAT and carefully clean the tip of it.
Check to be sure your intake manifold bolts are snug.
What do your vacuum lines all over the engine look like?
Check the line from the throttle body to MAP sensor. It has to be perfect. No splits, cracks, melted parts etc.
Remove your IAT and carefully clean the tip of it.
Check to be sure your intake manifold bolts are snug.
What do your vacuum lines all over the engine look like?
TB-Map should be good, I will check it again though.
I will check intake bolts tomorrow.
Vacuum lines are a mess but I haven't found anything that's open just sucking air, everything it plugged. Most of the ones unplugged are because the factory air box is removed and in place a cone filter.
12-16-2013, 05:55 AM
#21
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Use this to verify the vacuum system. also be sure the white plastic orifice in the rear valve cover grommet is not plugged. As a matter of fact, make sure the whole line is clearfrm the intake manifold.
12-17-2013, 12:45 PM
#22
Member
Thread Starter
Join Date: Oct 2012
Location: Springfield, Mo
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
This morning I started the jeep, I had to give it gas to start and drive with both feet holding the brake down and giving it gas coming to stops so it wouldn't die. I made my 5 mile commute to my buddies house where I pulled in his drive way and it idled fine. I could shut it off and immediately restart it without having to give it gas. If I let it sit for even 5 minutes I would have to give it gas to get it started and then hold the gas down for a few seconds then it would idle rough as can be for a minute and then clean up and idle perfect.
12-17-2013, 12:49 PM
#23
CF Veteran
Join Date: Mar 2010
Location: Broward County Fl.
Posts: 47,923
Likes: 0
Received 29 Likes
on
28 Posts
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Ya smelling gas like its flooding maybe leaking injectors ? Using gas pedal when starting is actually adding air not fuel on fuel injected systems.
12-17-2013, 12:52 PM
#24
Member
Thread Starter
Join Date: Oct 2012
Location: Springfield, Mo
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
No, I don't smell any gas. I was thinking fuel pressure regulator possibly? I can shut if off and immediately restart it 10 times in a row with no problem. As soon as it sits, its hard to start and a has a rough idle.
12-17-2013, 12:57 PM
#25
CF Veteran
Join Date: Mar 2010
Location: Broward County Fl.
Posts: 47,923
Likes: 0
Received 29 Likes
on
28 Posts
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Is there fuel in the vacuum line to it, is there vacuum at the line when running ? Cruiser the person to listen to on this issue .
12-17-2013, 01:01 PM
#26
Member
Thread Starter
Join Date: Oct 2012
Location: Springfield, Mo
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
12-17-2013, 04:15 PM
#27
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
What's plugged, according to the diagram?
12-17-2013, 04:18 PM
#28
Member
Thread Starter
Join Date: Oct 2012
Location: Springfield, Mo
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Vacuum fitting on the front of the intake has two ports plugged. One that runs to EGR and the other runs to the air box. That's it.
I'm thinking this problem is beyond vacuum lines. The jeep starts great if I start it after immediately shutting it off, it will start perfect, 10 times in a row. If it sits for even 5 minutes, I have to give it gas for it to start.
12-17-2013, 04:21 PM
#29
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Try this then.
After it sits, turn the key to On and then Off about 3 times. THEN go to Start. Is it better?
After it sits, turn the key to On and then Off about 3 times. THEN go to Start. Is it better?
12-17-2013, 04:23 PM
#30
Member
Thread Starter
Join Date: Oct 2012
Location: Springfield, Mo
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee