DISCLAIMER: I AM NOT RESPONSIBLE FOR ANYTHING THAT GOES WRONG WITH YOUR CAR, SHOULD YOU ATTEMPT TO PROCEED. FOR BEST RESULTS, THIS MOD WORKS BEST WITH A TUNE. DOING THIS ALONE WITHOUT A TUNE MIGHT CAUSE YOU SOME PART THROTTLE DRIVEABLILITY ISSUES.
Whattup guys and gals,
Ever wondered why OEM manufacturers thought of putting EGR systems on our engines, or any other engine for that matter. Ever thought of why do our engines route hot, black as fuck, polluted, gunky shit back in our intake manifolds? Well if you ever wonder why, Wikipedia that shit, I dont want to waste three paragraphs explaining how it works. But for me, it's annoying because its make my car run like shit in part throttle. This write up is for a MY93 Impreza. As some have told me, there are EGR systems from later cars with a tiny temp sensor on the intake manifold. I have never seen that before so I wont be covering that.
Tools:
5/32" vacuum plug
screw with 5/32" OD
2 zip-ties
Here's a self drawn diagram of how the system routes exhaust into the intake manifold:
The exhaust comes from the drivers side cylinder head, and waits for the vacuum operated EGR valve to open, which is controlled by an ECU driven solenoid.
![Image]()
This is what you'll do. Remove the vacuum line of the EGR valve and plug the vacuum line with the 5/32" OD screw, zip-tie it. Cap the EGR valve nipple with the 5/32" vacuum plug, and zip-tie it. (For boosted NA cars, you'll really want to zip-tie them to prevent boost leaks)
![Image]()
As long as the EGR solenoid plug is plugged in, the ECU will always think it is still working so no CEL will come on. You can even make a block-off plate and remove it completely. Just dont forget a gasket. Hope you'll enjoy your exhaust free intake manifold!!
Remember, DO NOT unplug your EGR solenoid!!
Whattup guys and gals,
Ever wondered why OEM manufacturers thought of putting EGR systems on our engines, or any other engine for that matter. Ever thought of why do our engines route hot, black as fuck, polluted, gunky shit back in our intake manifolds? Well if you ever wonder why, Wikipedia that shit, I dont want to waste three paragraphs explaining how it works. But for me, it's annoying because its make my car run like shit in part throttle. This write up is for a MY93 Impreza. As some have told me, there are EGR systems from later cars with a tiny temp sensor on the intake manifold. I have never seen that before so I wont be covering that.
Tools:
5/32" vacuum plug
screw with 5/32" OD
2 zip-ties
Here's a self drawn diagram of how the system routes exhaust into the intake manifold:
The exhaust comes from the drivers side cylinder head, and waits for the vacuum operated EGR valve to open, which is controlled by an ECU driven solenoid.
This is what you'll do. Remove the vacuum line of the EGR valve and plug the vacuum line with the 5/32" OD screw, zip-tie it. Cap the EGR valve nipple with the 5/32" vacuum plug, and zip-tie it. (For boosted NA cars, you'll really want to zip-tie them to prevent boost leaks)
As long as the EGR solenoid plug is plugged in, the ECU will always think it is still working so no CEL will come on. You can even make a block-off plate and remove it completely. Just dont forget a gasket. Hope you'll enjoy your exhaust free intake manifold!!
Remember, DO NOT unplug your EGR solenoid!!
