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Forced Induction Disable EGR and VSV on a 97 Corolla!

Discussion in 'Powertrain' started by hazer00, Nov 14, 2006.

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    hazer00 Psycho Child

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    Egr Has Been Disabled And Boost Is So Much Better!

    Does anyone know how to eliminate the EGR Valve and the VSV on a 97 Corolla and still have the engine run smooth and no check engine light when going into boost? Any thoughts, comments and idea's would be greatly appreciated.
    Thanks,
    Steve
    hazer00, Nov 14, 2006
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    vortex Well-Known Member

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    mmm so glad i dont have egr... i remember seeing something about this but i believe it entailed swapping out to a JDM motor (no EGR) and JDM ECU
    vortex, Nov 14, 2006
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    JspeXAE102 Well-Known Member

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    if you figure it out, i'll buy your old egr.. mines is busted.. CEL for the last 2 months.. hate that pos.
    JspeXAE102, Nov 14, 2006
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    Denver Rolla 98 impreza

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    oh is that all...
    Denver Rolla, Nov 14, 2006
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    1337Rolla oh my

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    couldn't you just plug the hole where the egr valve goes? and then put a 40 ohm resistor (that can handle the same wattage as the VSV could) in place of the VSV.

    this should fool the ecu and I don't think the EGR has any sensors tied directly to it.
    1337Rolla, Nov 14, 2006
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    JspeXAE102 Well-Known Member

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    I'm not sure if the flow sensor is the same as the VSV (or EGR solenoid as other call it).. but the treason for my CEL is a "insufficent EGR flow detected." Although I have not gone too far indept to find the problem. As long as the crapolla is not running limp, i'm happy.
    JspeXAE102, Nov 14, 2006
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    1337Rolla oh my

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    that is caused by one of these according to the manual:
    EGR valve stuck closed
    Open or short in VSV circuit for EGR
    Vacuum or EGR hose disconnected
    Manifold absolute pressure sensor
    EGR VSV open or close malfunction

    but I still think a resistor would do the trick. the thing is nothing but a solenoid that sends more vacuum to the EGR control valve

    could try pulling the tubes on the VSV and putting a cap on them and clear the cel, then see if it comes back or not.
    1337Rolla, Nov 14, 2006
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    JspeXAE102 Well-Known Member

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    Yea it's one of three things, EGR valve, modulator or VSV.. unfortunitely each of the three cost ~$120. I could test the EGR valve and modulator with a vac pump but I never managed to get my hand on one. I changed out those little vacumm hoses @ th throttle body but that didn't help.

    CB: where'd you get the 40ohm resistance value from? Have you had experience with deleting the EGR system from another car. I agree all that's need to be done is machine a block off plate and use a resistor to fool the ecu into thinking the vsv is in working order.
    JspeXAE102, Nov 15, 2006
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    vortex Well-Known Member

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    EGR was one of the dumbest ideas ever.
    vortex, Nov 15, 2006
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    1337Rolla oh my

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    '97 corolla repair manual. says the vsv has a resistance of 37-44 ohms
    1337Rolla, Nov 15, 2006
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    Rolla95 Rollin' Out y0

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    my CEL is on for the EGR Gas Temperature Sensor code 71. and im not spending $116 to replace it so i just took the vacuum line directly from the egr and put it straight to the throttle body so my EGR still works and i gained back my gas mileage since that, but the CEL is still on
    Rolla95, Nov 15, 2006
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    hazer00 Psycho Child

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    LOL, I love this guy^^

    Just like wayne said, my CEL is for a number of things and the EGR is the source of all of my problems. I have replaced the VSV and the EGR Valve twice and nothing!!! The damn CEL is still on. I have even blocked off the EGR Valve hole with billet aluminum 1/8" thick and the heat from the exhaust gases actually blew a hole through it. So I am going to try a thicker material next time. However before it shot a hole through it the light came back on. I have a series of check valves on my map sensor so I sensor only reads vacuum and my toyota scan tool, tells me it is in the right. However, my VSV and accumulator are a different story. they are fucked the moment I go into boost. Another problem is my 02 sensor is always saying insufficent flow and slow responce. Sucks ass. Wayne as for my EGR you don't want it, it's toast. I have been riding around with about 5-8 different codes for the past yr and a half.

    Corolla's Best, Please tell me more about this 40ohm resistor and what type and voltaqe to buy. I want to try this one out. And yes, my stupid car runs in open loop most of the time I am in boost. I found a way around that though. www.urdusa.com do a search for a ESC1. It is a split second controller that keeps your car in closed loop mode so that the cars ecu will not try to compensate for boost, it will however allow a piggy back or SAFC run the show. Pretty sweet device. Vamp has it installed. He has perfect a/f all throughout boost. I will get one of these for myself soon, however right now, I cannot afford it.
    hazer00, Nov 15, 2006
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    vortex Well-Known Member

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    hehe im just callin it like it is man.

    you and me both.
    vortex, Nov 15, 2006
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    1337Rolla oh my

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    for the resistor idea you'd need to find a resistor between 37-44 ohm's at room temperature.

    I looked on radioshack's site but they don't sell one within that small range. You'd most likely have to get multiple resistors and solder them together.

    like 20+20 or something. resistors can be soldered head to tail and in series it has an additive effect.

    this should barely be within the range. that is a pack of 5 so you'd take 2 head to tail soldered and that would replace where the 2 wires go in to the VSV. *should* null the system unless the computer is smart enough to figure it out because the value wouldn't change much.

    I think this is a low power circuit so these wimpy 1/4 watt resistors *shouldn't* explode, but.. with all things, there is a chance. no risk to the ecu though, if one goes the system just stops working.
    1337Rolla, Nov 15, 2006
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    vortex Well-Known Member

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    electrical engineering madness
    vortex, Nov 15, 2006
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    1337Rolla oh my

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    that's my degree!.. in about 2 years :p
    1337Rolla, Nov 15, 2006
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    hazer00 Psycho Child

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    pretty much worth every penny eh? I bet you have some crazy ass setups at your place with that degree.


    So how exactly would I wire this in! cut off the conector or something?
    hazer00, Nov 15, 2006
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    JspeXAE102 Well-Known Member

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    either cut off the connector and solder/crimp it or stick the resistor series directly into the connector, tape it up and hope it dosent fall out.

    so steve, am I to assume that you never got the CEL problem fixed even after you swapped over to a 5spd part no. EGR?
    JspeXAE102, Nov 15, 2006
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    1337Rolla oh my

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    I'd just stuff it in to the contacts of the plug for now until you know it actually works.. if it does I'd make a little plastic piece to plug in to the connector .. rip it off a non-working vsv maybe.
    1337Rolla, Nov 15, 2006
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    hazer00 Psycho Child

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    You assume correctly.. will let you know when I fix the problem!

    Ok, I will give it a shot
    hazer00, Nov 16, 2006
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    JspeXAE102 Well-Known Member

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    I did a little more research on the subject. I believe it is the EGR Gas Temerature sensor that is what tells the ECU to throw the CEL not the VSV (EGR Solenoid). The VSV/solenoid is afterall only a switch not a sensor. The only problem is I'm not sure where that sensor is located. On 93-95 it seems to be plugged right into the bottom port of the EGR valve. But I can't locate it on 96-97.

    http://www.autozone.com/servlet/UiB..._us/0900823d/80/16/a6/95/0900823d8016a695.jsp
    JspeXAE102, Dec 6, 2006
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    hazer00 Psycho Child

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    EGR has been successfully by passed! Thanks to "CorollasBest" for the resistor idea. One resistor a little bit of stainles stell and I am all set, no more boost lag and awesome power. Thanks.
    hazer00, Dec 12, 2006
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    Vamp Gunmetal 2001 Corolla S

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    Easier to street tune as well!
    Vamp, Dec 13, 2006
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    1337Rolla oh my

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    ;) Glad to help! Now it just has to hold up to long term use and keep the ecu fooled.
    1337Rolla, Dec 13, 2006
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    hazer00 Psycho Child

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    I hope so too. So far so good!
    hazer00, Dec 13, 2006
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