I bought my evo in nov. 08' It's a 06 Evo IX SE GG, I drove 1500 miles to get it in pheonix arizona. It was stock besides intake and tbe. It also had a tripod with a/f, boost, oil psi. The oil psi. gauge at idle basically died and dropped to 0 psi then any gas would make it jump to normal but i am not going to make an aftermarket gauge scare me! it drove out awesome and my dad is a mechanic and he thought it was fine... and i had already drove 2 days to get it and i was leaving without it so i bought it. It had at 27500 book at the time and i payed 21000 cause my dad owns a car dealership so it was a awesome deal!

Well 6 months after i owned it i did a comp. test for fun... ya not fun! It ran 71 psi all the way across !!!!!!!! so it scared me. I used a second tester and the same thing but i was not convinced it was real! so i tried a 3rd test a week later with a brand new tester and it ran 1 (71) 2 (71) 3 (155) 4 (155) so most people would guess head gasket... i did a head gasket test and it was fine... no milky oil, no white smoke not anything, no signs what so ever of a bad headgasket! HUH! So we put a little oil in each cylinder and of course they ran 155 all the way across! so it is either rings, head, or valves? But my car runs perfect and is super quick!


I could do a leak down test to be sure but i am afraid for the worst, And Mitsu might cover it depending on what it is but i dont wanna have them tear it down then say nope! we are not going to pay for it so **** THAT! I dont wanna take it there as of right now, so what do you think i should do??????????????

I also am 100 percent positive that it has no other mods... so no bigger turbo or anything like that! just to be clear!

 

If it runs as good as you say it does, I think there might be a problem with your tester.

 

If the comp test is fine and the car runs fine why are you worried? Your friend probably also needs to learn how to drive. A tune will change the outcome of a race as well. Maybe he just has a really bad tune and you have a good one. Take the car to a track to see what times you are running on the car.

 

You said you had it tuned by someone who knows a lot about Evos. Did he Dyno the car? Any tuner worth their salt with a laptop and a dyno should be able to tell you whats really going on.

 

the tuner that i had pulled the plugs and he said it looked like it had wall washed or becuase i steam clean my engine so much since i own a detail shop?! He knows his stuff and that is the whole reason i did these tests... I realizew that not all comp. tests are good and a leak down test is almost fool proof but i was just wondering what everyone else thought... i havent ran on a track but my old boss has a 2006 gto 6.0 with 13 lbs and ran a 11.9 at a track and i spank him!

 

If you did the wet test and the pressure went to normal, it's most likely the the rings leaking.

 

All the rings would go bad usually, wouldnt they? If anything its head gasket between the 2 cylinders so its swapping air back and fourth. There is no way i have bad valves in both cylinders, no way! I want to know if there is anything wrong but i would be devistated if there was and luckily my car is still 2 years till the warranty is over but i think mitsubishi would say hell no to fix it... i would take the mbc off and tune it to factory and intake and tbe dont void warranty hardly ever cuase i called and asked? I bet he is lieing im sure!

 

LDOGG_01, your expressions and punctiations had me reading your original post in a highschool girl voice.

 

You have low compression in two cylinders. There is an issue. Fix it.

 

Sorry i was just making sure everyone understood what i ment cuase a punctuation can change the way people look at it... and also everyone has there own idea of what they are reading... i put voices in my head too!

 

I am here asking if people think there is an issue and what it would be based off what i am telling you not (IS) there an issue... and do you know what is funny, I have tbe, intake, and a tune and you could have a hell of alot more mods then me and my car is probably faster!

 

k1tt3n5 whos that lady in your avi? do want

 

This would be my thought as well. If you did a leakdown, and the HG held up, multiple compression tests are telling you the pressure is low in two cylinders, so I would rule out tester failure. Also, the wet test tells you that the pressure jumps up, also indicating bad rings in those two cylinders. Boroscope the low compression cylinders and see what you see.

Like I said, my guess would be rings. Replace them, rework the internals if need be, don't beat on it.

This statement is retarded. Don't fire off on people when you are asking for our constructive help on your problem. Yeah, the guy gave you a half-assed answer, but deal with it. If you ask me, he was correct in saying that there is a problem, and fix it. You are talking about driving around on a car with two low compression cylinders. You might beat him half way up the strip, but you will see half of your motor strewn behind you on the back end.

I hope you figure this problem out, but don't fire off with responses like that. It makes you look childish.

 

i thank all of you for all your help but comp. tests come back bad alot of the times... i might even be doing them wrong (highly doubted) but i could be. But how do you guess only 2 rings go bad, the engine works the same all the way around, those 2 dont work twice as hard so they dont wear out faster if you unserstand what i mean? so do you think the it is a manufacture problem or something else? that is another one of my questions, would Mitsu fix it under warranty?

 

i dont see how your ruling the rings out. they dont all go bad at same time. doesnt sound like a headgasket or valves since oil in cylinders raised compression back up.

how many miles and how much boost was it running?