Hello all
Firstly,yes,I'm a Brit so please excuse the strange sense of humour!

My problem (with the car...*s****er*) is this:

I have a 2001 import Evo VII in standard spec. The problem I have is a random misfire that only appears to occur on motorways (freeways) or long,straight roads. The misfire causes the trip computer to drop the car into "limp home mode" and on pulling over,the engine runs very ragged. If the engine is switched off and restarted after 10-20 seconds,everything is back to normal.
I have had it looked over countless times by the Ralliart specialists at Mitsubishi UK and they can only find the trip computer giving back a general misfire fault code (think it was E301).
Sometimes the car will go 200 miles without a problem,other times it will only go a few hundred yards.
I can't put it down to any specific set of circumstances such as weather,temperature or driving style as the fault cannot be replicated on demand!
It also,for some perverse reason,only shows up the fault when I'm driving,it won't do it for either the mechanics or my fiancee!
I use the power available from the car but don't thrash it and my driving is a mixture of town and motorway driving. I never use it for short journeys and only use high quality premium gas.

What we've replaced so far in a bid to cure the problem is:
Plugs
HT leads
Timing belt
Air filter
Crank case pressure sensor
Mass airflow sensor

and to be honest,I'm running out of cash!

I hope someone out there can suggest what the problem might be before I need to see a shrink!

Thanks for your help

 

*bump*
Come on guys,someone must be able to shed some light on this or know a tuning guy who might be able to help?
I know you Americans,I've seen "The Fast and the Furious" [8D]

 

bad coil maybe?..?

 

Yeah,that's what the guys at the UK owner's club reckon too,gonna try it this weekend followed by a parade of the servicing chief's head on a pointy stick! [>:]

 

Hi mate, i am having the exact same situation as you experienced. I had spend quite some cash into fixing it but its not any where near fixing it. Have u fix your problem? If u have fix it would u mind sharing how u fix the issue?
Very much appreciated