Ralph, where did you get your blue silicone vacuum hose? Everything is in mm on Amazon.

 

For the "plate" under the EGR, it'll toss EGR codes when it sees that the EGR, it does nothing. No big reason to plate it on a street vehicle anyway; when working right, it costs you nothing and can improve the highway fuel economy.

There SHOULD be a under-hood (mine is on the bottom of my hood!) vacuum plumbing diagram, although it's in a manner that takes a few minutes to cipher out (well, did for me.)

If nothing else, for NOW, I'd put a cap on that fitting and see how it improves.

I've attached the plumbing diagram from the factory service manual. If you have a nipple on the kegger intake that's not connected, it's supposed to be plugged on your truck; plug it and seal that vacuum leak up!

Since it's a kegger, it may have a blown (or sucked!) plenum gasket; look down through the throttle body and see if the intake is oily on the bottom. If it is, plan on pulling that plenum and sealing it (a new gasket with new, just-a-hair-shorter bolts will do the job. Or the Hughes / Mancini / whoever else plenum repair kit that uses an aluminum plate instead of the factory steel plate.)

While planning that, you might want to read up on what Marty Fletcher's been doing with the kegger intake. It's somewhat impressive to me. His site is http://utawesomeperformance.com/kegger-vrp.html (well, UTAwesomePerformance.COM is his site; that's what I'm talking about, though, the Volume Reduction Plate mods).

Before you panic and do anything else, check that vacuum plumbing diagram and see if you can't get yours right.

RwP

 

You can use 3mm vacuum hose for 1/8 inch if you lube up the fittings; that'll also help seal on an old hard plastic stub.

But I bought mine on Ebay ... I THINK this link: https://www.ebay.com/itm/3MM-1-8-Blu...T/112853679137

BTW - 1/8" is 3.125 MM, so ...

RwP

 

Great info.. I like this place.
I looked down through the butterflies and it is filthy, black, and oily at the bottom.

 

I have the EGR plated since I replaced it and there was no change. The gas tube is broke and the bolts in the manifold are guaranteed to break.
My plan is to end up with headers so I figured I would plate it.

 

It'll keep tossing EGR codes then.

Did you plug the EGR hoses?

Also, time to pull that plenum, clean it out completely, and put it back together.

RwP

 

All of my vacuum lines are where they need to be.
The "leak" in rear chamber has a fitting with an electrical plug. I don't see a nipple to plug and I don't know what a kegger is.

 

Well excuse me. Sometimes one should open a book. It's the idle air controller. It's working. All of my vacuum lines are good. There is also the injector code. Should I now be checking the fuel pressure?

 

But do I need to pull the egr vacuum lines and plug them?

 

Hey Ralph, that plenum and/or plate inside being oily, and blown, would that make it run rough? Is it a sign of something more major? Eventually it will get a rebuild or replaced with more HP. But for now i need to keep driving it.