Casey Goehl

Hey all. I’m a first time Jeep owner, and have never been a “ car guy” I recently purchased a 95 XJ, a few bells and whistles and decent mileage. I’m going to skip over the no dash lights/blinkers (for now) because a lot of you have already covered this.

Recently, I cleaned the throttle body and noticed corroded lines and what I would call caps or plugs, just below the idle air valve. Not spark plugs, I have no idea what they are for. Vacuum, sensors? Ect. I’d like to replace them but it’s hard when I don’t know what they are. I’m sure you old pros will get a good laugh at me as I learn all about this. Below is an attached photo. Thanks.

Corroded caps came off of these stems. What are they? What do I need to replace ?

Cummins93

Do you have the 99+ intake manifold in place of the original?

Casey Goehl

Honestly, I don’t have a great history of the vehicle, after some research, there is a good likelyhood that it is an 99+ intake. What would that mean. Thank you.

dave1123

Is that by any chance a 4 cylinder because that throttle body doesn't look familiar? Those are vacuum supply ports for various things and any unused ones should be capped.

Casey Goehl

Thank you for the reply. Yes it’s a 4cyl. One of the ports had a cap with a very small diameter plastic hose running from it, I now think it ran to the MAP sensor. Would that make sense?

dave1123

Yes and that's a important hose to have attached. The MAP sensor has a lot to do with fuel mixture.

Casey Goehl

[QUOTE=dave1123;3608424]Yes and that's a important hose to have attached. You’re the man, Dave. Thank you!