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Unread 10-06-2013, 07:48 PM   #1
MichaelS75
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1999 WJ 
 
Join Date: Aug 2013
Location: Charlottesville, Virginia
Posts: 131
Map sensor connector

The connector to the map sensor on my 4.7 is totally broken and the wires don't seem to be connecting well throwing a p0121 code and causing my wj to stall. I taped it up but that only fixed it for a day or two. Should I try to find a new connector somewhere or can I just bypass it and wire it straight to the sensor?

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Unread 10-06-2013, 08:50 PM   #2
gold3n_8oy
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2001 WJ 
 
Join Date: Dec 2010
Location: jakarta, Indonesia
Posts: 83
Quote:
Originally Posted by MichaelS75 View Post
The connector to the map sensor on my 4.7 is totally broken and the wires don't seem to be connecting well throwing a p0121 code and causing my wj to stall. I taped it up but that only fixed it for a day or two. Should I try to find a new connector somewhere or can I just bypass it and wire it straight to the sensor?
Hi. Can you show me pictures or the exact location of this map sensor?I have map sensor codes on and off..plan to clean it first before replacing it. Thank you.
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Unread 10-06-2013, 09:04 PM   #3
MichaelS75
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1999 WJ 
 
Join Date: Aug 2013
Location: Charlottesville, Virginia
Posts: 131
These are crappy pics but basically it's attached to the front of the intake manifold behind the alternator. You can access it much easier if you take off the air intake box
image-3876142342.jpg

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Unread 10-06-2013, 09:34 PM   #4
gold3n_8oy
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Quote:
Originally Posted by MichaelS75 View Post
These are crappy pics but basically it's attached to the front of the intake manifold behind the alternator. You can access it much easier if you take off the air intake box
Pics not clear but i will give it a try. It is not mounted at the back of the alternator does it? Is it hard to remove? Thanks again
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Unread 10-07-2013, 07:58 AM   #5
MichaelS75
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1999 WJ 
 
Join Date: Aug 2013
Location: Charlottesville, Virginia
Posts: 131
No it's behind the alternator attached to the intake manifold. I used a 20 or 25 torx bit and a 6 inch extension and it was still tough to get it out. Just look in between the alt and the AC unit and you'll see it attached
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Unread 10-07-2013, 10:27 AM   #6
gold3n_8oy
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2001 WJ 
 
Join Date: Dec 2010
Location: jakarta, Indonesia
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Quote:
Originally Posted by MichaelS75 View Post
No it's behind the alternator attached to the intake manifold. I used a 20 or 25 torx bit and a 6 inch extension and it was still tough to get it out. Just look in between the alt and the AC unit and you'll see it attached
Ok.i saw it. But i gonna forget to do it myself as it is hard..gonna ask a mechanic to do it.thanks
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Unread 10-07-2013, 04:33 PM   #7
bigred1821
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2004 WJ 
 
Join Date: Jan 2013
Location: Berlin, CT
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I had a similar problem in the spring. I replaced the sensor but broke the wiring connector. The new sensor didn't seem to work. Eventually I found that the rubber elbow that comes out of the back of the map sensor and elbows into the throttle body had a small crack in it, causing the code and for the truck to stall out if I wasn't on the gas. I have the 4.0 but it wouldn't hurt to check this because I overlooked it and it was a really easy fix.
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Unread 10-08-2013, 07:41 PM   #8
gold3n_8oy
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2001 WJ 
 
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Location: jakarta, Indonesia
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Quote:
Originally Posted by bigred1821 View Post
I had a similar problem in the spring. I replaced the sensor but broke the wiring connector. The new sensor didn't seem to work. Eventually I found that the rubber elbow that comes out of the back of the map sensor and elbows into the throttle body had a small crack in it, causing the code and for the truck to stall out if I wasn't on the gas. I have the 4.0 but it wouldn't hurt to check this because I overlooked it and it was a really easy fix.
Will check it.thanks
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