Replaced the knock sensor, still does it. Now I find out that service manager isn't sure that the first tech that was working on it ever tried replacing the pcm. All the inputs into the pcm are good and all the harness out of the pcm are good, all the sensors chek out, hell most of them have been replaced. Which leaves two options either the pcm is bad or the engine actually is knocking. If it turns out that the pcm is bad and they never changed it I'm going be so pissed I can't even begin to describe. Now they are actually asking me for any troubleshooting suggestions I may have. So, I told them to try plugging in the old knock sensor and wrap it up in rag or something where it won't here any knocks but it is still sending an input to pcm and just lay it in the engine bay some where. Correct me if I'm wrong here but if the engine still stumbles that should determin that the pcm is just doing something freaky when it's picking up that signal. If it doesn't stumble that would mean it is an honest to god noise that the knock sensor is hearing and there is a mechanical problem, right. Then to top it all off I call mits. customer support to inform them that I'm sending my dispute resolution letter(lemon law) in and they seem to care less. Their like "okay is there anything else I can do for you today." and all I'm thinking is what have you done for me so far?

 

I have been having the exact same problems, it turned out that my engine ground was loose! All my gauges were going crazy and reading wrong. Also my car was running too rich with the tune I had. Tightened the engine ground and had my car dynotuned and it runs perfectly now. Running too rich will make you detonate as well, so I would have recommended a dyno tune even though your stock your particular car could just be finicky who knows?

 

the lemon law is not as easy as people make it seem , my parents had a conversion can that leaked , and actually poured water all over the front passangers when it rained, they tried to fix it over 6 times before (not one time working) sending hte car all over the usa and making every ****ing excuse possible before they gave in and let them have a new car , which wasn't the same price as the old one , it was a few grand less. there last resort if handing you over a new car , just remember that

btw , whole process almost took 2 years before they gave us a new one. they had to go to court and everything , it was rediculious

 

fre we are not having the same problem. My car does not lose electrical power, it loses horsepower. Everything else works fine, gauges, lights, radio, etc... It just falls flat on it's face @3800 rpm in third and fourth. If it were a bad electrical connection I would have to think it would be more random than that. They took my idea and hooked up the old knock sensor and insulated it from any engine noise or other noise for that matter and the car still falls flat at the same point. It's not as drastic as it was but you can still feel it which leads me to believe it is a bad PCM.

 

Evoking295, belive me I don't want to go through with the lemon law. It is strictly a last option, which is about where I'm at now. If them changing the pcm doesn't fix it there isn't much else to do. I have to file a dispute resolution to get mitsubishi to get off their *** and give the dealer some support or me a new car. The dealer actually told me it is more common than most people think for the manufacturer to buy a car back and that they would support my claim all the way. I was told by someone who has gone through this here in NC that it is basicly a third that comes in makes sure that the dealer has done everything according to procedure, covered all the bases, and then makes a recmondation to mitsubishi as to what to do. I would be willing to bet that one reason your parents had such a hard go of it is because it was a conversion van and the manufacturer(chevy, dodge,whoever) blamed the company that actually does the conversion (glavel, markIII,whoever) and vice versa. My mother has a conversion van and had an accident a while ago. The damn insurance company wouldn't pay to fix the running board or part the striping because "those are aftermarket accesories" eventhough they came on the van from MarkIII.

 

I can't believe this, The district parts and service rep. is at my dealership tonight. So, I go just to meet him and make nice with him( figure it can't hurt). When I get there the service manager is telling him all the problems with my car and how nothing fixes it then, he asks him "Wanna take it for a road test?" The guy says "Sure let's go." We all get in the car and go down the road and can you believe this thing doesn't miss a beat. Runs like a champ. I'm sitting there in total disbelief and this guy is looking at us like we're are full of ****. The guy asks "What have you done to fix it? The service manager says" Nothing, I sent the mechanic to put some gas in it and it even missed on the way back from the gas station. We left right from where he parked it." This is just another piece of evidence that god hates me. I also sent in my dispute resolution form today start the lemon law. This is all I need is for my start pretending it's fixed for all the important people to drive it and tell me there is no way we are buying this car back. Everyday for the last month and a half you could make this car do this on command, one of the few times I actually want it to do and it won't. It's to the point now where I just don't want this car back, there is obviously something screwed up and I don't believe it just magicly fixed itself. I just hope this little episode doesn't screw up my dispute.

 

these cars obviously suck. looks like i am buying an sti.

 

Obviously, please do buy an STi.

 

Please don't get me wrong, I'm getting another Evo. I by no way shape or form think this car sucks. You have to understand that every car maker is going to have a car like mine, a mechanics nightmare. There are no exceptions to that. Besides mitsubishi is trying to do the right thing and I really have nothing bad to say about them. It just gets extremely frustating and, I tend to vent on this board when I get home.

 

Man In all the bad stuff about this car along seems to totally out weight the good stuff that people say on this board. I wanted and evo so bad that the clutch problems didn't phase me in the least but now all these engine problems people that don't get warrenty claims that should. I am really starting to fear that for my first car that I am going to buy new, this is not the car for me. I almost need to have a 100% reliable lexus or other car. first.
I hope that you get a new car like you should and it runs like a champ.
P.S. I know that we see all the bad posts and not a lot of the good posts. just kinda scarey looking at spending 30k and then get stuck with a pos.

 

double post MyIe2 f-ed up

 

Try this:

Have them replace the MAS and put in a stock paper filter. Could be that the oil from the K&N drop in killed your MAS.

Other than that, I don't know what to tell you other than don't buy an STi.

 

They already tried that. Believe they have replaced everything short of the engine and trans that it could be. Here's a list of parts in no particular order.

1.turbo w/ wastegate and soleniod
2. coils
3.wires
4.sparkplugs
5.fuel injectors
6.fuel rail with press.regulator
7.fuel pump
8. pcm
9.knock sensor
10. MAF
11. checked all inputs and outputs of PCM
this car just has a gremlin it.

 

Welcome to the world of the fabulous Mitsubishi 4G63.

Just wait untill the warranty expires, there is a nice little saying with the DSMs,
"Turnning normal people into mechanics sence 1989."

Give it a few years and it will cary over to the EVOs as well.

About your problem, It looks like the dealership has knocked out just about all of the common causes for misfire, and what might cause fuel cut. Have they logged the engine doing this "misfire"? That would at least give you a real world Idea as to what the sensors are doing at the point where it bonks. It would seem like a common thing to do, but I'm not sure if dealerships have logging equiptment that they could take on the road to get real data with insted of what it is doing sitting still. Having replaced everything already, logging is going to be the only way to really let you know what the ECU is thinking and what sensor is telling you that it's time to kill the fun.

 

I wouldn't take the car back even if they fixed it. All that work that has been done to it.. who knows if they put it all back together right.