Hi everyone. I have a question about my 2003 Evo. My car has a AEM intake and a RSR exhaust. My problem is that my car stalls out sometimes. It happens if I go a short distance and push in the clutch to stop. Usually when the rpm's go up high and then you push the clutch in. Lets say I pull out at a stop sign and then stop right away my car either stalls or almost stalls. I took it to the Mitsubishi dealership about this problem and they blamed it on the AEM intake. So I have been trying to find a used factory air box to replace the intake. Is the dealership full of it or what? They told me that the car needs to be tuned and they can't do it. I called a shop and they told me it sounded like boost leak. But I can't find a leak. I would like to do a pressure test, but I don't know how. Could someone please help me with this. Thanks

 

do you have a BOV that vents to the atmosphere?

 

I would think it's a boost leak, check all your clamps, make sure they are tight, check your mass air pipe, make sure it's on the turbo, what type of bov are you using, and is it venting? because that could cause the car from stalling.

 

The car is completely stock other then the intake and exhaust.

 

dealerships cannot tune and it does sound like your intake. get a stock box or tune it with a flash or something.

 

I checked all of the clamps before and they are all tight. It doesn't stall all of the time. The rpms will dip down to about 500 rpms and then bounce back up if I am lucky. How would I do a pressure test?

 

I am going to auto cross the car this year so I do not want to tune it, but I do want a factory box. When I bought the car it had the AEM intake on it.

 

What I meant to say was that to auto cross in the stock class I need to get a factory air box, to stay with in the rules. Do you think that will take care of my problem?

 

I personally think its your intake. Open intakes make your car run like *** unless you are tuned for it, so your best bet would be to have it tuned or find a stock airbox from this forum or locally.

Wow, I'm a bit suprised your dealership sounds knowledgeable regarding the situation.

 

Yeah I was to that was the first correct thing they told me. Does anyone have a factory air box they want to sell?

 

Well i had a similar problem with my wrx, i know two different cars but maybe this will help.

If you have an AEM intake I am assuming it’s a 3 inch system. Go to a hardware store an buy a piece of 3 inch piping, maybe a lil smaller just something that will fit into you intake tightly (plastic that you would use for plumbing purposes). Buy an end cap for it an tighten it down and seal it with glue or puddy of some sort. Then buy a one way check valve (like in a bike/car tire). Drill a hole in the end cap and put the valve in. Seal it like you did the end piece so it is all air tight.

Take the filter off! Put the piping into the intake and use your clamp to hold it in) as air tight as possible). Then Open the car up to full throttle (while car is off of course). Run air through the one way check valve like you would pump a tire up so probably use a air compressor. Watch your boost gauge once it gets to about 20 PSI stop putting air in a listen for a squealing sound AKA leaks, then find them and fix them, repeat until you get all leaks out. Hopefully this works.

 

I will give that a try. Thanks for the help.

 

Should I put the pipe directly into the intake pipe or run the air through the map sensor housing?

 

goes right on the turbo inlet

 

Pm sent!