Its an interesting point that SiC and Tephra brought up about engines more broken in than newer ones and the potential additional wear increasing the gaps to an acceptable range.

I do see that some of our 500-600whp Evo X's do have a bit higher mileage than some of the ones with the issues.

 

Any failures with e85? I haven't seen any yet/hear of any, possibly because of the additional safety net it provides against knock and cooling effect.

 

Haven't seen any E85 failures which I believe are attributed to the 30-50*C lower EGT's which I am sure put a bit of a damper as great a piston expansion than on pumpgas.

 

So yet another reason E85 rules, man i love the corn.

 

I didn't mod my car. I fixed it because it came broken from the factory. Have you driven a stock early 08 tune? I thought I bought a broken car when I broke it in and pushed it the first time after I bought it. A monkey tuned the car, it choked and shook the entire car violently as I accelerated by flooding itself with fuel. Mitsubishi ignored the issue so I ran to the tuning market for help because it was unbearable, I was actually fine with stock HP/TQ levels if it actually ran smooth and fine. Mitsu sells me a broken car and then complains when I try to fix it myself because they won't? What a bunch of dicks.

It was hilarious though, when I had passengers who didn't know about the issue in the car they always thought the engine blew each time I revved.

 

How many people actually had this so far? 2?

 

no X failures here but I'll let ya know if something related turns up.

 

I think there are 3 officially listed in this thread via posting of pictures. Yet, not a single detail has been shared about any of those cars.

There have been claims by the OP of other cars having this happen, but no proof of them existing.

 

So far fewer than the number of X's that have rolled?

I think they should fix the instability that causes [or allows] them to roll over in a crash first.

 

I had a UICP, Front Mount, Catback, MBC, K & N drop in, and an AMS Tune with peak boost @ 22psi as well as the Rev limiter set to 8k.

Things that could have gone wrong... I was accelerating around an on ramp getting onto the highway with less than half a tank of gas when my issue originally occurred. Not sure if my fuel relay was ever swapped @ Mitsu.

 

I have spoken to others on another forum. I can probably say there was a good 6 I have been approached by personally. One guy this happened to twice. Mitsu put in a new short block and it chunked the pistons again not long after. So that guy is on his 3rd motor!

 

It wasn't, they will not do that swap under warranty, or look for it. Your dealer might have if you asked, but not on their own.

8k rev limit is way more of a concern if you ask me with the valve springs on the x. I am not sure if you are one who had something happen, but if so I would be more inclined to blame that.

 

Globally, I'd guess there are more than 10,000 Evo Xs sold since introduction. I'd venture to guess at least 5,000 sold in the US if not closer to 7,000. Only a handful of documented failures of this type. Hardly enough to freak out about.

But, it could be a serious problem that is related to a specific tuning method? Or to a specific mod path? Or to a specific horsepower level? There aren't any documented cases of stock cars with this failure. We just don't know what could be causing this because there aren't details being provided about the cars that failed. We can't come together as a forum and learn how to move forward without any data.

Thank you That helps.

Mild mods. Seems like a mild tune. 8k rev limiter could be an issue if you're revving beyond the original red line. The issue you bring up about fueling is interesting.

 

It would be interesting to know if the cars affected were early X's; e.g. early build dates.

 

I know of at least 10 on the other forum but I can't post the links here so here are their names and thread titles;

Imsoevox - R.I.P...another 4B11

legendary_wraps - Big problems....

KARo7 - Blown engine!!?!

EvoX08 - Blown Up!!!!!

Rik84 - 2008 Evo X - Engine Blown

nero - evo broke round 2!

Several others over there and if you look these ones up you can look up the other threads posted by the people and most had warning signs ahead. They always start out as higher rpm stutter or cutting out in 5th gear etc. I didn't read back through all of them but I believe these were all a combination of issues topped off by a bad fuel relay.