EGR question on an NA

Discussion in 'Technical' started by RENZED, Aug 10, 2009.

  1. RENZED

    RENZED Girl in the black beast

    Greetings all :)
    Just took the zed in to get the new exhaust installed (headers, cats, x-pipe, magnaflow mufflers) :D, but I've got a question regarding the EGR..

    We plan NOT to reconnect the EGR valve to the exhaust..I just need to know, can we simply leave the exhaust to EGR pipe disconnected so we can drive the Z home and then remove the rest of the EGR valve and associated pipes at home?

    Or

    Do we need to disconnect the pipes from the plenum as well and block the ports off? Or can we just disconnect the vacuum lines from the EGR valve and block them off which should stop the EGR valve opening so we can leave the other pipes attached until we get round to removing them?

    I've currently got the bypass kit, it's just in a real shit spot to get too..can someone please help me out? Any advice, is good advice? :zlove:
     
  2. Zedophile

    Zedophile Member

    On the drivers' side of the plenum there is the EGR

    actuation valve with three pipes coming off it. Pull the three pipes off and block them off with something. Actually you only have to block off the one that eventually goes to the plenum to provide the necessary vacuum but I can't remember off hand which one it is. Anyway then the EGR valve won't be activated and so you won't get any air coming into the plenum to screw up your fuel/air mixture unless of course your EGR valve is leaking slightly which is why you should install your block off kit where the EGR pipes attach under your plenum each side but this can wait. Good luck.

     
  3. RENZED

    RENZED Girl in the black beast

    Come on, someone must know something about this? Craig and I have read the Tech article and searched, but we are still unsure whether we can just drive the zed home with it disconnected and not fully removed..

    Please help us..:(
     
  4. Chrispy

    Chrispy Pretentious Upstart

    If it is already bypassed then it's sweet.

    If not, just unplug the EGR solenoid then it can't work and should remain shut.
     
  5. MikeZ32

    MikeZ32 das Über member

    I'm guessing you're putting on TTZ headers without the bung for EGR?

    If so all you need to do is blank off the plenum holes for the EGR pipes, remove the small solenoid on the driver's side and you can drive it for as long as you want like that. The fact the valve at the back of the motor is still there makes no difference, it won't do anything as long as all 3 of the below condtions are met:

    leave big EGR pipe on passenger disconnected
    remove + blank off plenum EGR holes
    bypass EGR solenoid
     
  6. R31 Gagz

    R31 Gagz Harden the F#%K up!!

    So basically I just need to block off the left and right lines on the solenoid and hope that the EGR valve itself isnt leaking and we should be able to drive it home fine? Then we can block off the two plenum EGR ports underneath and behind the TBs and run a bypass line between the vac port on the hard pipe and TB vac port?

    [​IMG]

    [​IMG]

    Cheers!

    Craig
     
  7. Chrispy

    Chrispy Pretentious Upstart

    Yep, even if the EGR is leaking a bit it won't be enough to do anything drastic. Just take it easy on the way home and there will be nothing to worry about :)
     
  8. airstyle

    airstyle Z Anarchist

    Just cap the vac lines where the egr is supposed to connect to, don't need to run any bypass hoses.
     
  9. R31 Gagz

    R31 Gagz Harden the F#%K up!!

    Just heard back from the exhaust shop...almost done :)

    Said the original exhaust manifolds were a real bitch to get out, very time consuming...also said the X pipe was a tight fit and a bit too long, stopping him from putting on some bracket that connects either side of the trans tunnel, said its pretty thin though and doesn't believe it has any structural value or use and so will just leave it off.

    He's actually welded a bolt into the old EGR exhaust pipe to block it off, so that should stop any exhaust/vac leaks if the valve is stuck open at all.

    Little question regarding the EGR solenoid valve, the two vac line plugs look like they are meant to slip over a steel line, not block an actual rubber vac line...so am I correct in assuming you actually just block the middle line "to EGR valve" on the solenoid as per the below pic? But then where does the second one go?

    [​IMG]

    Cheers!

    Craig
     
  10. airstyle

    airstyle Z Anarchist

    OK well since the exhaust manifold is bolted up.

    All you have to do is block all vac lines on the plenum. The EGR is not doing anything/ nor is the egr solenoid.

    According to my memory there are 5 you have to block off, one thin one at the Throttle Body, 1 on the steel T-Line that originally goes to the EGR solenoid, and one thicker one near the top of the plenum (balance pipe possibly? can't exactly remember). After that you need to block off the under plenum intake runners.

    You don't have to worry about the solenoid or the EGR itself if the exhaust has been welded and the two under-plenum runners have been blocked.
     
  11. MikeZ32

    MikeZ32 das Über member

    This is correct.

    You might be thinking of the stock hardlines Craig which will have a provide for AIV. If AIV is gone then this is all you should be left with.

    [​IMG]
     
  12. AndyMac

    AndyMac Better than you

    Disconnect the solenoid connector and drive it home. It will be fine.

    Don't worry about bypassing everything at the shop, without the signal from the ecu the solenoid won't allow the vac passage to open and the EGR will remain shut.

    Once you get home do it properly.

    BTW, 99.999% of all factory installed EGR's stopped working years ago. But disconnect the solenoid anyhow.

     
    pexzed likes this.
  13. R31 Gagz

    R31 Gagz Harden the F#%K up!!

    Thanks guys for all your awesome help...will do as you say Andy, pull the solenoid plug and properly remove it all at home.

    He also said there were a couple of pipes connected to the original CATs that he has taped up...can't remember what they are called but Im thinking these are the things located in the front guards, another emissions system that helps heat the CATs up quicker or something? But do I need to do anything with these or just make sure the pipes he was talking about are blocked of 100%?

    Cheers!

    Craig
     
  14. retro zx

    retro zx the retro legend

    Can you get the egr delete kit localy or is it only available from overseas ?
     
  15. MikeZ32

    MikeZ32 das Über member

    Mate, guarateed to be AIV or AIV air tanks. You don't need to do anything or even block them off because it won't do anything now that they're disconnected from the exhausts.

    Pull them out though... sounds like reneye's zed needs to have a lot of the basics done :eek:
     
  16. LOWZX

    LOWZX Banned

    hes probably talking about the aiv's,i would have thought they were long gone
     
  17. Chrispy

    Chrispy Pretentious Upstart

    All you need is a bit of plate cut to the right shape and something to block up the whole in your manifold. Old bolt will do.
     
  18. R31 Gagz

    R31 Gagz Harden the F#%K up!!

    Yeah thats it, the AIV...yeah never pulled her Z apart that much, we should have deleted the AIV when the guards were off for the spray job but never thought of it at the time :rolleyes:...they can stay there now.

    Also Chrispy, new extractors were just installed so no blanking plates needed ;)...thanks anyway :thumbup:

    Oh and we already have an EGR delete kit Retro...just figuring out what we need to do to limp it home where we can fully install it.

    Cheers!

    Craig
     
    Last edited: Aug 11, 2009
  19. airstyle

    airstyle Z Anarchist

    Wait, you had extractors installed, but you also had a bolt welded into the...manifolds? Am I missing something here? Or did your extractors have an EGR bung?
     
    Last edited: Aug 11, 2009
  20. LOWZX

    LOWZX Banned

    dont need the guards off,pull back the inner plastic wheel well splash shields,easy peasy ;)
     

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