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  1. #1
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    Default EGR solenoid/Vacuum tree

    While I have the plenum off waiting for my injectors from FIC, I figured I would replace anything that could possibly fail.

    I noticed the EGR solenoid has a vacuum connection with 2 steel clips facing the passenger side. There is nothing connected and I can't find anything hanging around to hook up.

    Looked in the FSM and can't find a diagram.

    If anyone knows what it is or where to find it in the FSM I would appreciate a hand.

    Thanks

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    Look at the emission label on the radiator shroud.

  3. #3
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    Thanks Jim

    It looks like it just might be a retainer as the diagram doesn't show anything coming out.

    I wasn't getting any EGR code.

    Bought a new EGR valve.

    The old EGR has the big "piston" all the way out and it won't move , the new one is flush with the mounting flange except for the small piston which sticks out about 3/16 and moves freely.

    you think the old one is bad?

    Bob

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    Quote Originally Posted by rlg View Post
    Thanks Jim

    It looks like it just might be a retainer as the diagram doesn't show anything coming out.

    I wasn't getting any EGR code.

    Bought a new EGR valve.

    The old EGR has the big "piston" all the way out and it won't move , the new one is flush with the mounting flange except for the small piston which sticks out about 3/16 and moves freely.

    you think the old one is bad?

    Bob
    There is an entire section in the FSM on EGR operation and diagnosis, what does it indicate?
    Here is a link to a good article on EGR operation
    http://www.asashop.org/autoinc/dec97/egr.htm
    Lots of guys with L98's experience the problem described in paragraph #5

  5. #5
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    Top'


    Good article, I have modified the exhaust, (Dual exhaust,no cat and stock mufflers).

    I never got the dreaded 32 code. I just noticed the piston was all the way out on the old valve and frozen, I don't see how it could have worked.

    I bought a new one and noticed it's piston was flush with the mounting base with the exception of the smaller (center) piston extending about 1/4 of an inch and moves freely when pressed.

    With my luck I will put a new one in and then I will get the 32 code!!!

    Thanks

    Bob

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    I just noticed something else, vacuum nipple on my new egr is smaller than the oem, and the hose is not going to stay on. anybody dealt with this?

    Thanks

  7. #7
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    Any parts store should have a selection of inline or tee style vacuum connectors similar to this assortment.
    http://cgi.ebay.com/ebaymotors/Vacuum-Connector,-Tee,-%1AY%1A-And-%1AL%1A-Assortment-(51-Pcs)_W0QQitemZ150332882868QQcmdZViewItemQQimsxZ20090317?IMSfp=TL0903172010004r14640

    add a short length of smaller vacuum hose and you are golden.

  8. #8
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    Quote Originally Posted by rlg View Post
    I noticed the EGR solenoid has a vacuum connection with 2 steel clips facing the passenger side. There is nothing connected and I can't find anything hanging around to hook up.


    Thanks
    The wedged shaped clips on the passenger side of the EGR solenoid was for a small sponge like air filter, nothing is connected to it and is not an issue if it's missing.

    FS

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    thanks boost, I have some of that stuff around here. That will give me something to do while I wait for the next 20 year old part to fail.

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    Just noticed you're from Broken Bow! Nice area.

  11. #11
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    Quote Originally Posted by rlg View Post

    you think the old one is bad?

    Bob
    Probably just fouled with carbon.

    How much 'too small' is the vacuum port on the new EGR? Can it be clamped to seal? If not, get a male-to-male line adapter, and a short section of the proper sized line.

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