dkmcgowan Posted July 23, 2015 Share Posted July 23, 2015 I need to replace my map sensor hose. It is a plastic tube that it plugged into the throttle body and then goes to the map sensor on the hood. I can pull the plastic piece out of the throttle body and the rubber piece stays on the throttle body. It's like it has to places for hoses to go in, but only the bottom is used. I did read the top one is plugged so no worries there. Can I just pull that rubber piece out of the throttle body? What's behind it, is it a hose connection so I can just use regular vacuum hose to replace it? Link to comment Share on other sites More sharing options...
reubj Posted July 23, 2015 Share Posted July 23, 2015 You can pull it out, no worries. Regular vacuum hose with the proper connectors will work fine. Some guys replace that hose with 3/16 brake line for a lifetime fix. Link to comment Share on other sites More sharing options...
dkmcgowan Posted July 23, 2015 Author Share Posted July 23, 2015 What do you mean by proper connector? Is it just a hole on the throttle body or is it a vacuum nipple? The rubber piece shoved in there right now with the hard line stuck in the middle of it's kinda worn out, worried that when I pry it out of the throttle body it might fall apart on me... Link to comment Share on other sites More sharing options...
Crash Posted July 23, 2015 Share Posted July 23, 2015 I used a length of vacuum line with the plastic pieces at the ends to join it all together Link to comment Share on other sites More sharing options...
ParadiseMJ Posted July 23, 2015 Share Posted July 23, 2015 The rubber grommet has two apparent holes. Only one of them is a "hole", that goes all the way through.The other hole/stud is just a keeper to keep the hose in place and tight. Use the correct diameter hose, it actually makes a difference whether you have bigger or smaller hose. If you pull the grommet out and just stick a hose in there, you could have the possibility of a less than tight connection Link to comment Share on other sites More sharing options...
cruiser54 Posted July 23, 2015 Share Posted July 23, 2015 Use the grommet. Remove the broken piece of plastic from inside it. Put a new plastic line into the grommet and use contact cement or the like to get the 2 to bond together. Link to comment Share on other sites More sharing options...
dkmcgowan Posted July 23, 2015 Author Share Posted July 23, 2015 Does anyone make a new grommet? Link to comment Share on other sites More sharing options...
cruiser54 Posted July 23, 2015 Share Posted July 23, 2015 Does anyone make a new grommet? No. Got a 1/8 NPT tap? Link to comment Share on other sites More sharing options...
dkmcgowan Posted July 23, 2015 Author Share Posted July 23, 2015 Might tap it, but will try the 3/16 brake line first, it's probably slightly larger and might seal up better. Link to comment Share on other sites More sharing options...
Marine1Texas Posted July 23, 2015 Share Posted July 23, 2015 when I cleaned out my throttle body, the outlet from the throttle body broke off. I took the rubber boot out pulled the plastic line out and replaced it. cut a 1 1/2 inch plastic like piece from the plastic vacuum lines. I took a little rtv silicone and put around the edges. making sure not to plug or restrict new vacuum line. works great and no leaks... Link to comment Share on other sites More sharing options...
cruiser54 Posted July 24, 2015 Share Posted July 24, 2015 when I cleaned out my throttle body, the outlet from the throttle body broke off. I took the rubber boot out pulled the plastic line out and replaced it. cut a 1 1/2 inch plastic like piece from the plastic vacuum lines. I took a little rtv silicone and put around the edges. making sure not to plug or restrict new vacuum line. works great and no leaks... Yup. Link to comment Share on other sites More sharing options...
1989 Eliminator Posted July 27, 2015 Share Posted July 27, 2015 when I cleaned out my throttle body, the outlet from the throttle body broke off. I took the rubber boot out pulled the plastic line out and replaced it. cut a 1 1/2 inch plastic like piece from the plastic vacuum lines. I took a little rtv silicone and put around the edges. making sure not to plug or restrict new vacuum line. works great and no leaks... I also did the same thing. Bought new plastic vaccum line from a auto parts strore and used RTV to seal it better. It is a bit tricky to get the old plastic out of that rubber but it is managable. Link to comment Share on other sites More sharing options...
cruiser54 Posted July 27, 2015 Share Posted July 27, 2015 when I cleaned out my throttle body, the outlet from the throttle body broke off. I took the rubber boot out pulled the plastic line out and replaced it. cut a 1 1/2 inch plastic like piece from the plastic vacuum lines. I took a little rtv silicone and put around the edges. making sure not to plug or restrict new vacuum line. works great and no leaks... I also did the same thing. Bought new plastic vaccum line from a auto parts strore and used RTV to seal it better. It is a bit tricky to get the old plastic out of that rubber but it is managable. You make it sound SO EASY. Is that because it really is? LOL. Link to comment Share on other sites More sharing options...
dkmcgowan Posted July 27, 2015 Author Share Posted July 27, 2015 I got some 3/16 brake line, a tube bender, and a tube cutter. I made up a nice piece that fits pretty snug. I believe I have no more leaks at the MAP sensor. I also replaced the MAP sensor with a new OEM one as well. Still working through some issues, but this weekend I'm doing cruiser tips 1-6! Link to comment Share on other sites More sharing options...
1989 Eliminator Posted July 27, 2015 Share Posted July 27, 2015 when I cleaned out my throttle body, the outlet from the throttle body broke off. I took the rubber boot out pulled the plastic line out and replaced it. cut a 1 1/2 inch plastic like piece from the plastic vacuum lines. I took a little rtv silicone and put around the edges. making sure not to plug or restrict new vacuum line. works great and no leaks... I also did the same thing. Bought new plastic vaccum line from a auto parts strore and used RTV to seal it better. It is a bit tricky to get the old plastic out of that rubber but it is managable. You make it sound SO EASY. Is that because it really is? LOL. Haha not exactly.... 26 year old rubber and plastic wanna be left alone! Link to comment Share on other sites More sharing options...
Marine1Texas Posted July 27, 2015 Share Posted July 27, 2015 the rubber you can make it flex again. there is this stuff called rubber Renue. you just put it all over it and after about 10 minutes it flex's pretty good Link to comment Share on other sites More sharing options...
coolwind57 Posted October 24, 2017 Share Posted October 24, 2017 Today, I replaced my MAP vacuum line with copper tubing, as you see in the pic below. Reviving an old topic here, but I noticed this: On 7/23/2015 at 10:22 AM, dkmcgowan said: I did read the top one is plugged so no worries there. and this: On 7/23/2015 at 3:09 PM, ParadiseMJ said: Only one of them is a "hole", that goes all the way through. The other hole/stud is just a keeper to keep the hose in place and tight Fellas, my top orifice is indeed open. I know this because I removed the rectangular block that the vacuum tubing inserts into. Both holes are wide open; neither are plugged. I did temporarily plug the top hole with my finger just to see if it affected idle, but I noticed no difference. Probably should plug it, right? Link to comment Share on other sites More sharing options...
Marine1Texas Posted October 24, 2017 Share Posted October 24, 2017 yes it should be plugged then. Link to comment Share on other sites More sharing options...
cruiser54 Posted October 24, 2017 Share Posted October 24, 2017 the upper hole is there but it dead ends. Read this. http://cruiser54.com/?p=280 Link to comment Share on other sites More sharing options...
coolwind57 Posted October 25, 2017 Share Posted October 25, 2017 4 hours ago, cruiser54 said: the upper hole is there but it dead ends. Read this. http://cruiser54.com/?p=280 I had read this prior to my working on it. Instead of tapping and inserting a fitting, I chose the quicker route of retaining the rectangular rubber TB insert and just ran my copper tubing directly into it (via the lower opening). I'll likely do your technique when I have more time to remove and clean up my throttle body real good. So, I suppose what I didn't know is that although that rectangular rubber insert in which the tubing inserts, does have a hole all the way through it, the metal behind it does not. Sound correct? Link to comment Share on other sites More sharing options...
cruiser54 Posted October 25, 2017 Share Posted October 25, 2017 Yup Link to comment Share on other sites More sharing options...
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