2004
Mitsubishi
Lancer Evolution
27k Miles

This is my first post, and I'm sad that it has to be one asking for help, but I have a big problem. The car is completely stock except for a turbo timer. I just picked it up 4 days ago and it has been driving great. I also changed the Oil the first day i got it, But today when driving on the freeway my car all of a sudden started bogging at about 4k RPM. I pulled off the freeway and the car ran fine up until about 3.5k rpm and then it would lose all power and almost die. I took it to an auto shop and they diagnosed it as the cat being clogged so when I got home I took off the exhaust and drove around and it still did the same thing. So It's definitely not the cat.
The car sounds completely fine when in first with the clutch disengaged being revved up, it's just when under load that it has problems. I hear the turbo spooling up but just no power at all. Going up hills was near impossible as well.

Here are some videos with the cat on, off, under load, and in neutral

Driving Cat on(The jerkiness in the video is the car lurching around from loss of power)
http://www.youtube.com/watch?v=StW38vaRFeQ

Neutral Cat on
http://www.youtube.com/watch?v=Lx66QJDFoyM

Driving with Cat off
http://www.youtube.com/watch?v=XvizMzfSar0

Car in neutral with cat off
http://www.youtube.com/watch?v=lV-Xl7XBWbE

Thanks in advance!
Philisdiller

 

check your plugs.

 

Check your pipings if its loose.

 

Thanks, I'll do that right now.

 

Your gas light is on on all 4 vids But besides the obvious, you should find out with your A/F is before it bogs. Take it back to the shop that tell you it was the cat and let them put the computer and drive the car. Multiple things can cause that.

 

Unplug battery and plug it back in

 

Yea, do that.

 

boost leak or plugs i had an issue simular like this( when on high way and got into higher RPM car would fall on its face) and it was a boost leak from a coupler that was super loose but maybe it can be one of those or totally irrelevant! lol GL

 

check piping,spark plugs, and try resetting the Ecu by takin the neg battery terminal off for a couple mins.

all the things everyones said to do already should find your problem

good luck and welcome to the Evo world!

 

Mine was cutting bad at 5k under load.

Found the reason as leaky IC piping down off the inter-cooler where the previous owner didn't tighten it down after removing aftermarket IC before trading in. I would check all piping and hoses.

Curious to what your AF is doing.

 

My IC piping had completely blown off. It's running great again! Thanks for the help, and the extremely fast responses!

That was the AF with O2 sensor as well. AF is all normal haha

Honestly, I'm extremely impressed with this community.

 

i would replace your plugs and check your couplers. grantee its on or the other

 

Was having a spirited race against a porsche and bmw m3 - the power was surging nicely until it simply dropped it came back once the revs had dropped to almost 0 then I had the power again, odd I thought. So when I had the time I looked at the boost pipes, intercooler pipes all tight, all top pipes tight. I took her out for another run and gave her some stick same thing around 4k and BAM! nothing. I have new plugs, leads and coils.
I did however smell exhaust fumes and was wondering as to whether it could be a clogged cat? Would you smell exhaust fumes in the car if this was the case?

Weird problems these :/

Thanks

 

Its either boost leak or not enough fuel. Can you tell if it's leaning out or getting rich?

 

It's been 5 years you know. He's married and have kids and probably don't drive the evo