VTCS removal

[204vividPro5]

I bought the mp3 ecu and I pulled my intake manifold tonight, do I remove all butterflies in the manifold, and what do I do with the holes from the rods that go thru? I'll try to find the write up but thought I'd ask while I'm looking

 

[whatusername]

http://www.mazdas247.com/forum/show...VTCS-Removal-and-Porting/page9&highlight=vtcs
post 129

 

[204vividPro5]

Thanks

Thank you for the link. I'll look at some epoxy tomorrow or may weld the holes shut.

Also is there any benefit on deleting my egr

 

[whatusername]

That 1 i don't know about... i had my egr unplugged. For a week n had rough idle and a code p401 for egr. N i plugged it back in and its running smooth again

 

[pcb]

To "delete" the EGR you need to make a block-off plate that installs over the gasket. That way the ECU thinks it's still working and you don't get the code like whatusername did. If you replace it, get the "Canadian" version with the coolant lines then you won't have any more problems with the EGR.

RockAuto: STANDARD MOTOR PRODUCTS Part # EGV1124 {#FSY118W00} Intermotor CAD$111.90

 

[204vividPro5]

Cool

I'm going to look for quick steel first to block off the holes in the runner.

So as long as I block off my egr at the header and intake manifold I shouldn't have any issues with the way my car runs and drives? I just want to make sure because I can make a block off plate easy. What do I do with the egr plug afterwards just tuck It off to the side?

Can I remove vics as well?

 

[pcb]

So as long as I block off my egr at the header and intake manifold I shouldn't have any issues with the way my car runs and drives? I just want to make sure because I can make a block off plate easy. What do I do with the egr plug afterwards just tuck It off to the side?

The block off plate is a thin piece of sheet type metal with just the holes drilled for the bolts. The EGR is installed on top of it and has to be tight to seal it up good. The Egr remains attached and plugged in to "fool" the ECU into thinking it is still operational.
The plate seals off the flow of exhaust gas between the chambers. The EGR still operates normally but doesn't have the exhaust going through it to heat it up and foul it with carbon deposits.
The exhaust gas going into the intake is supposed to help cool the cylinders and reduce emissions but from what I gather it doesn't affect things very much.
It's when the EGR is stuck open letting exhaust in when it's not supposed to that your car runs like crap.

 

[204vividPro5]

?

With the mp3 ecu I can delete the vics and not worry about problems after its running?

 

[BRIAN_MP5T]

For the hole in the side, I tapped it and threaded a bolt into it with some thread sealant.

 

[204vividPro5]

.

Ya I was reading that I'll be doing that I think or completely close it off. I just bought metal epoxy, good up to 3000 psi. I ordered new intake and tb gaskets ($13 for both lol) my tb was trashed that may have explained vacuum leak symptoms that I had in the fall.

I have been reading about vics it sounds like it's a neutral thing if you want to delete, Open full time or opens when it builds and hits 5200 rpms. If there isn't much loss I'll block off all holes. I gotta finish my engine bay tuck and clean so more s*** I can eliminate the better.. I'm having a hell of a time breaking the egr tube free from either end lol ill have to find my snipe

 

[204vividPro5]

Wires

I'm just going to ask on this thread Instead of starting a new one.... What should I be doing with the unwanted wires with my wire tuck. Cut and cap? Or just tie them up good and hide as far in as possible... Since the intake manifold is removed it's a very good time to take care of this

 

[204vividPro5]

Bump

What do I do with the vtcs a d vics harness after? just tape them back and hide? I don't know if I should completely cut and cap or just tuck It away

 

[CWilson]

Recently purchased a maoddified stock intake. Same thing you are discussing. Hoping for more power.

 

[i12drivemyMP5]

When I did my VTCS removal I actually just cut the butterfly rod off even with the first port it protrudes into in the manifold and left the solenoid installed and it looks completely stock from the outside. Car still thinks it's doing what it is supposed to, lol. I wouldn't do anything but red loctite the butterfly screws on VICS tho. Not having that on NA car will rob low end torque and probably negatively affect mpg.

 

[Installshield 2]

^^yeah, there really isn't any performance benefit to removing VICS on an NA car...it DOES help at low end, but doesn't really hinder anything at higher rpm (on NA engines, that is, its a different story when turbo'd)...the VTCS is a restrictive system though, so removing that is obviously good for intake charge...

you definitely can remove both...but on a mildly modded NA FS, VICS is your friend for the most part...