How-To: VTCS Removal and Porting

What are you going to do to the throttle body? I haven't inspected it to see if there are casting imperfections or other buggers in there. I'm not interested in needing a larger diameter butterfly.
 
Got mine all done and installed tonight but had 1 problem that really sucks. I have a perrin fuel rail and when I went to plug in the injectors I couldnt you have to plug them in first then put the rail on. So I go taking the injectors back out and 1 was really tight cause the oring had a spot in it and I ended up ripping a chunk out of it. Now I have to wait till monday to get a o ring from the dealer ughhhhhhh!! Other then that I didnt have any problems.
 
Hey Darkrid3r, so you did just remove the upper part of the intake then and not the whole thing ? I'm gunna do mine here pretty soon as was hoping to just remove the top portion.
 
you can remove only the top portion of the intake, but you have to remove the 2 huge screws underneath the Low part or the manifold. you will understand why when you'll come to it..


HELP::::::
When i start my car, it takes like 4 seconds before it starts. i know mazda are slow starting cars, but its freakin slow. when i removed my injectors yesterday there was fuel everywhere, so i put a little bit of water on the intake manifold... ill check if theres water on the spark plugs, then i,ll reset the ECU...

if its not helping... WHATS WRONG?! :(
 
darkside i have no idea how to help you out but you said you hear it at 3500rpm+, thats cool that its louder, but do you feel any noticeable gains?
 
well i had a small 2inch CAI that i replaced with a 3Inch AEM , at the same time as i put my ported intake...

but its freaking loud, the sound is amazing. and for the gains, well i'd say its gives tork at high rpm mostly, but the accelaration are more aggressive!!!

crazy stuff.
 
and for my problem, well i guess my oring i put to replace the chunked one is too small. :S.. fuel-air leaking i guess, thats why it smells :S

ill check that monday
 
ok so i am new to this what exactly does this do if you remove it?? please help me out i have seen a couple of people talking about it and am confused i havea 2002 protege5.
 
Any body in the SD area done this before thinking about doing would like some help from some one who has done it before. please let me know
 
hey please help. im still getting problem with it done
i replaced my 4 oring injector because they were chunked.

but now everytime i start my car, if it hasnt started in the last 6-8 hours, well when it starts it goes up to 1500 rpm (to heat the engine for couple of senconds, then goes back to 700-800) , but instead of that, it starts, goes at 1700 rpm for like 1 second, than it goes down to 300-500 RPM. if i push on the gas pedal it goes back to normal.

i dont believe its an EGR issue, since it doesnt happen when im idling at any other time. please help? :(
 
300-500? I thought the first line on our tach was 500, so you can't even really see 300.

Just tapping the gas pedal once makes it totally normal after that? When the car is fully warmed up does it still idle that low?
 
DarKrID3r said:
hey please help. im still getting problem with it done
i replaced my 4 oring injector because they were chunked.

but now everytime i start my car, if it hasnt started in the last 6-8 hours, well when it starts it goes up to 1500 rpm (to heat the engine for couple of senconds, then goes back to 700-800) , but instead of that, it starts, goes at 1700 rpm for like 1 second, than it goes down to 300-500 RPM. if i push on the gas pedal it goes back to normal.

i dont believe its an EGR issue, since it doesnt happen when im idling at any other time. please help? :(

Did you remove your VTCS and plug off the nipple on the solenoid with a cap? That's your problem. Vacuum leak, or a leak in the intake tract somewhere.
 
Yea you have to have that one vaccum line only going to the vics solenoid which is the one with the white dot and you have to get 2 nipples to plug the vtcs solenoid.
 
well I have my 2nd solenoid going to the vtcs, but i didnt put that thing that makes the vtcs move, i just used glue and a screw to fill the hose.

and this happens only once every like 10 hours (if i havent used the car for a long time) and NO it doesnt idle that low any other time afterwards
 
but IMO it seems like an Injector problem or something? i dunno

or maybe i have to screw tighter the injector rail? (how tight they must have to be tighten?)

when you say the solenoid, are you talking about the Mistubishi electronic part, or the thing that is moving? because i dont have that VTCS thing that is moving, i cutted before that point.
 
There are 2 nipples on the solenoid. One facing up and the other facing the firewall. The solenoid is the plastic mitsu part. The part that moves is the actuator.
 
ok, so on the noid theres the part going to the actuator, and the thing thats coming from the intake ( which is splitted between the 2 noids )

so i have to unplug the vtcs noid from that thing?and only leave the vics with an input pressure? i thought that leaving an imput pressure on the vtcs also, and using a nipple to fill the output of the solenoid would do?
 
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