I have no vacuum lines running from the egr solenoid to the vacuum fitting, and there is also no vacuum line going from the solenoid to the egr valve.

 

Okay.

Answer this.

What transfer case do you have?

 

it's the NP242 transfer case. would the egr not getting any vacuum caise the idle?

 

OK 242 lights are operated off an electrical switch.

Lack of vacuum to EGR will not cause it to open and give you a vacuum leak at idle.

Have you traced the intake manifold vacuum source to wherever it's going now?

 

I've gone over everything, and most of the vacuum lines are non existent, cut or capped. I also had no vacuum going to the fpr but I do now. where is the switch at for the tcase and can it be cleaned? I appreciate all the help so far

 

Driver's side rear of transfer case. Isn't that the least of your worries now though? The lever gives the position.

Can you post a pic of your lack of vacuum stuff?

 

I'm just like you, 88 with a np242.
I had some bad bulbs in my message center and when I replaced them I got my part time light and full time lights back.
Have you checked to see if you got bad bulbs?
And also, I would take cruisers advice and buy both of the vac harnesses.
One more thing to look at, I had a wavering rpm at idle once and it turned out to be a bad o2 sensor(Dflinstone will back me up on this as he had the same thing)
Good luck man

 

He's right^^. Get the harnesses and git r done.

 

yep I plan on getting a new harness and hooking up the vacuum connections like factory. and ill look into the 02 sensor thanks

 

Just adding a bit. Agreed with Cruiser, it's an electrical switch.
And yes, a functioning EGR valve needs vacuum to let exhaust into the intake manifold. If it's stuck, or otherwise failed it could be a potential vacuum leak. No Idea how often that happens. It does deal with exhaust gas and whatever else is coming out the exhaust. Just one more place for a potential leak.....

 

Does anyone know where I can buy one of these, this party exactly ? for 87 cherokee