Evo 7 trouble shooting! need help!
Thread Starter
Newbie
Joined: Oct 2012
Posts: 20
Likes: 0
Evo 7 trouble shooting! need help!
Background:
2001 Mitsubishi Lancer Evolution 7 GSR Japanese Import.
155,000 km's on the clock.
Melbourne, Australia.
Last thread on issue:
Summary of issues til now:
1. Heard a bang sound while wasting car (Not running). After driving it, it had the check engine light on and lost power at 50% engine load and greater..
2. Thought it might be a faulty MAF sensor, but couldn't get a hold of a working one to trouble shoot before spending $500 to get a new one.
3. After writing the Thread above and getting advise, I stated checking for boost leak. I found 2 leaks and fixed them.
Current Problem:
After fixing the Boost Leaks, I checked the pressure again. The pressure was taking/inserted from where I removed the MAF. I found another Leak which gives me more concerns.
I found pressure in the Rocker Cover when I opened the Oil-refill Cap. I had this pressure when I first got the Check Engine Light problem, but after checking different model performance cars, most had the same. So I ruled it out as a cause of the issue and put it down to normal engine age or PCV valves. I prayed it wasn't blow-by.
When I did the boost leak test, I found the pressure again... THIS REALLY CONFUSED ME!!! how did pressure from the intercooler, turbo, intake and combustion chamber get into the rocker cover??????????
Additional Questions:
Is the PCV valve system connected to the other systems I pressurised.?
Could the PCV valve system be at fault? (is the 1-way valve broken and letting pressure in)
Is it a deeper issue with internals and/or gaskets? (I.e. bent valves, blown gasket, etc)
2001 Mitsubishi Lancer Evolution 7 GSR Japanese Import.
155,000 km's on the clock.
Melbourne, Australia.
Last thread on issue:
HTML Code:
https://www.evolutionm.net/forums/evo-general/647084-maf-replacement-fail.html
1. Heard a bang sound while wasting car (Not running). After driving it, it had the check engine light on and lost power at 50% engine load and greater..
2. Thought it might be a faulty MAF sensor, but couldn't get a hold of a working one to trouble shoot before spending $500 to get a new one.
3. After writing the Thread above and getting advise, I stated checking for boost leak. I found 2 leaks and fixed them.
Current Problem:
After fixing the Boost Leaks, I checked the pressure again. The pressure was taking/inserted from where I removed the MAF. I found another Leak which gives me more concerns.
I found pressure in the Rocker Cover when I opened the Oil-refill Cap. I had this pressure when I first got the Check Engine Light problem, but after checking different model performance cars, most had the same. So I ruled it out as a cause of the issue and put it down to normal engine age or PCV valves. I prayed it wasn't blow-by.
When I did the boost leak test, I found the pressure again... THIS REALLY CONFUSED ME!!! how did pressure from the intercooler, turbo, intake and combustion chamber get into the rocker cover??????????
Additional Questions:
Is the PCV valve system connected to the other systems I pressurised.?
Could the PCV valve system be at fault? (is the 1-way valve broken and letting pressure in)
Is it a deeper issue with internals and/or gaskets? (I.e. bent valves, blown gasket, etc)