MAP sensor rubber plug

kenny811 · Oct 14, 2009

So on a brand new 4.0 in my 89 the rubber plug of the MAP sensor has pop out 3 times (in about 2 hours) it fits pretty snug so I dont thing its a vibration thing. I also found the little plactic tube to be broken. I fixed that with some rubber tube. But its the popping out that consernse me. Anybody have this problem before? I used a little dab of hi temp silicone. But I would like to know why its doing it.

Thanks
Kenny

joe_peters · Oct 14, 2009

Its popping out of the throttle body or popping off the MAP sensor?

GSequoia · Oct 14, 2009

I'd bet from the trottle body, that's pretty common.

Just dab some RTV on the outside of the tube or rubber block (whichever is coming free), that'll hold it in there just fine. (Happened on my '89 about six year ago, that fix has held the entire time)

kenny811 · Oct 15, 2009

Sorry Joe Peters, the throttle body. I did the RTV and is seems to be holding in there. While talking about this, what the top hole for? The bottom hole has the tube?

GSequoia · Oct 15, 2009

kenny811 said:
Sorry Joe Peters, the throttle body. I did the RTV and is seems to be holding in there. While talking about this, what the top hole for? The bottom hole has the tube?

The upper hole isn't a hole at all, it's just a block off. I don't know why the throttle body has two holes in it.

joe_peters · Oct 15, 2009

GSequoia said:
The upper hole isn't a hole at all, it's just a block off. I don't know why the throttle body has two holes in it.

Agreed. Might be used on overseas XJs but that is only a guess.

kenny811 · Oct 15, 2009

Cool, well the RTV seems to work. I was talking to a buddy that runs an Auto Zone here in Vancouver wa. He said you cant even get that tube peice. YOu can get the sensor ($24) but not the tube peice. After looking at it, it doesn't seem to hard to modify. With the right sizr rubber plug and tubing.

joe_peters · Oct 15, 2009

kenny811 said:
Cool, well the RTV seems to work. I was talking to a buddy that runs an Auto Zone here in Vancouver wa. He said you cant even get that tube peice. YOu can get the sensor ($24) but not the tube peice. After looking at it, it doesn't seem to hard to modify. With the right sizr rubber plug and tubing.

I ALWAYS hate to disagree with the Vatozone guys, but here is both parts of the vacuum harness--it has been changed to plastic/rubber:

DORMAN Part # 46004

{HELP! - Carded #53004868}
Vacuum Harness; Rear

$17.19$0.00$17.19

DORMAN Part # 46003

{HELP! - Carded #53004838}
Vacuum Harness; Front

$17.19$0.00$17.19
The first part, the REAR harness piece, has the MAP/throttle body tube.

MAP sensor rubber plug

kenny811

NAXJA Forum User

joe_peters

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GSequoia

Everyone says I'm a jerk.

kenny811

NAXJA Forum User

GSequoia

Everyone says I'm a jerk.

joe_peters

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kenny811

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joe_peters

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