Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

EGR Valve on 88 TBI 350... What happens when it goes bad?

Discussion in 'The Garage' started by foxman, Jul 8, 2004.

  1. foxman

    foxman 1/2 ton status

    Joined:
    Oct 22, 2001
    Posts:
    251
    Likes Received:
    0
    Location:
    Detroit MI
    Mycheck engine light comes on only under constant highway speeds @ 60-65mph. Usually does it when towing. The only code present is the EGR code. I replaced the EGR Solenoid and made no difference. Should I look at replacing the Actual valve?

    Thanks for any info.


    Jeremy
     
  2. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

    Joined:
    Feb 17, 2000
    Posts:
    7,385
    Likes Received:
    0
    Location:
    Atlanta
    Sounds like the passages are clogged.

    Confirm the valve is opening. There is usualy some holes in the bottom and you can feel the diaphram lift when you apply vacuum. Some of these EGR'S bleed off and you will not be able to check with mighty vac. You will have to have the engine running and by pass the solonoid to direct vaccum to do this test.

    Second test and possibly the first is to hit the EGR with direct vac at idle. It should start stumbling and possibly stall.

    If you confirm it's opening and then don't get the idle issue while you test at idle then you have a clogged port.
     
  3. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

    Joined:
    Jan 27, 2003
    Posts:
    3,254
    Likes Received:
    0
    Location:
    Castro Valley, CA
    What Reaper said! /forums/images/graemlins/thumb.gif
     

Share This Page