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Thread: EPR question

  1. #1
    Join Date
    Feb 2003
    Location
    Grand Rapids MN 55744
    Posts
    1,648

    Default EPR question

    Howdy
    My 1984 6.2 has had the EGR system removed. The EPR valve is still in place with no vac to it. What position is it in with no vac? It still moves freely so its not stuck. Just haven't gotten around to removing it. Probably will happen when I replace the intake with dual plane non-egr.
    Thanks!
    1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
    1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
    2001 Chinook RV, V10 gas
    1974 John Deere 1530 diesel tractor
    1993 John Deere 455 Diesel lawn mower
    1967 GTO, 1989 Honda Transalp
    2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
    1998 6.5 suburban, stock, daughter's
    1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's

    1984 6.2 ATS turbo 3500, SCDWLB - Son's
    3 kids, 1 wife, 1 dog
    Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!

  2. #2
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,573

    Arrow

    It should default to open, but as they get old, they just flap around, rattle and get very annoying until you realize what's making that racket. When you get in there, remove the butterfly and shaft, and install short carriage bolts, inside-out, to plug the shaft holes (minimal restriction, and they won't leak).

    I realize modifying an emission system isn't exactly the right thing to do, but the parts are no longer available, and the only replacements are other worn out parts. On your 84, EGR performance is never monitored, only the presence of the electrical components and the state of activation. When your remaining EGR system fails, if it hasn't already, you'll have similar difficulty sourcing parts, and similar solutions may be required.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
    Join Date
    Feb 2003
    Location
    Grand Rapids MN 55744
    Posts
    1,648

    Default

    I have already float tested the EGR valve. It must have been bad as it sank(the good ones float in water) I made a machined "test plate" to cover the port inside the manifold. The new manifold(non EGR) is waiting a rainy day to instal
    Thanks for the INFO!!!!
    1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
    1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
    2001 Chinook RV, V10 gas
    1974 John Deere 1530 diesel tractor
    1993 John Deere 455 Diesel lawn mower
    1967 GTO, 1989 Honda Transalp
    2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
    1998 6.5 suburban, stock, daughter's
    1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's

    1984 6.2 ATS turbo 3500, SCDWLB - Son's
    3 kids, 1 wife, 1 dog
    Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!

  4. #4
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,573

    Arrow

    Yep. I love the float test. Never fails.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

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