2004 Evo has extreme power loss - Car Troubleshooting


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2004 Evo has extreme power loss

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Philisdiller
New User

Sep 24, 2010, 7:44 PM

Post #1 of 4 (1571 views)

2004 Evo has extreme power loss	Sign In

2004
Mitsubishi
Lancer Evolution
2.0 liter Turbo
27k Miles

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 3k 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. The car sounds completely fine when in neutral being revved up, it's just when under load. 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/v/StW38vaRFeQ?fs=1&hl=en_US

Neutral Cat on
http://www.youtube.com/v/Lx66QJDFoyM?fs=1&hl=en_US

Driving with Cat off
http://www.youtube.com/v/XvizMzfSar0?fs=1&hl=en_US

Car in neutral with cat off
http://www.youtube.com/v/lV-Xl7XBWbE?fs=1&hl=en_US

Thanks in advance!
Phil

(This post was edited by Philisdiller on Sep 24, 2010, 8:21 PM)

Sidom
Veteran / Moderator
Sidom profile image

Sep 24, 2010, 10:47 PM

Post #2 of 4 (1554 views)

Re: 2004 Evo has extreme power loss	Sign In

Is your check engine light on? Was there any stored codes?

You can start off with something easy to do and the would be to clean the MAF sensor (mass air flow) with MAF cleaner.

Philisdiller
New User

Sep 24, 2010, 11:17 PM

Post #3 of 4 (1548 views)

Re: 2004 Evo has extreme power loss	Sign In

No light on at the moment, ill check for stored codes though. Yeah, I was planning on doing that in the morning, but the sudden intensity of power loss makes me think that a hose might have blown off or something

marinejunkie37
User

Sep 25, 2010, 2:52 PM

Post #4 of 4 (1517 views)

Re: 2004 Evo has extreme power loss	Sign In

Is the blowoff valve working properly? Also, the hoses are a good place to start. You also may have a defective part you just installed.

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