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The mysterious Backfire! SES light

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Old Dec 29, 2003 | 11:15 PM
  #16  
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I'm still trying to figure exactly what the hell everyone is talking about. Are we talking about the issue that I have asked about at approximately 80 mph at light throttle the engine will sputter and won't accelerat until you fully release the throttle and depress it again? Everyone thought it was my ignition. Now it sounds like it "may be" a recall issue. Sweet!
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Old Dec 30, 2003 | 02:59 AM
  #17  
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i havent had this problem and have 4k on it . Its funny how they related tranny with misfire . Then if you have mods they will blame it on that . I wouldnt be surprise if your car as an aftermarket strut bar , that mitsu blames it on that . an tries to cancel your warranty . Mitsu makes a great car but has no ***** to back it up if anything goes wrong. Even with mods that are not causing the problem ...
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Old Dec 30, 2003 | 07:13 AM
  #18  
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Keep in mind that service managers, friends or foes - whatever they may be to you, are not the most informed people on the planet when it comes to technical details. They only know what Mitsu corporate tells them, and what their techs discover, or what they deem important enough to retain. I wouldn't bet any cash on this diagnosis until something solid comes out of Mitsu NA.

BTW I don't have this problem at 10k miles.
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Old Dec 30, 2003 | 09:50 AM
  #19  
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Originally posted by webguy330i
Keep in mind that service managers, friends or foes - whatever they may be to you, are not the most informed people on the planet when it comes to technical details. They only know what Mitsu corporate tells them, and what their techs discover, or what they deem important enough to retain. I wouldn't bet any cash on this diagnosis until something solid comes out of Mitsu NA.

BTW I don't have this problem at 10k miles.
Very true webguy. All you can do is make an assessment of the information put before you and discern for yourself what is good info and what is bad. So far this is about as confirmed or solid information I have heard about this problem that people are having, that's why I was sharing. I will talk to him again today to see if I can get more out of him.

BTW- I have 13k miles on mine with no problems either.
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Old Dec 30, 2003 | 09:55 AM
  #20  
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Originally posted by WILDMAN


Very true webguy. All you can do is make an assessment of the information put before you and discern for yourself what is good info and what is bad. So far this is about as confirmed or solid information I have heard about this problem that people are having, that's why I was sharing. I will talk to him again today to see if I can get more out of him.

BTW- I have 13k miles on mine with no problems either.
Definitely get a copy of the TSB if such a thing exists. Otherwise we should consider this a non-issue affecting a very small percentage of cars that need to be diagnosed on an individual basis. BTW thanks for looking into this, even though I'm not affected it is a good contribution to the Evo community as a whole.
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Old Dec 30, 2003 | 11:07 PM
  #21  
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Welp, I just hit this error code tonight... it came on after doing a short speed burst up to 100mph then braking back down to the speed limit (or lower) which is 75mph. I believe right after I gave it some gas the SES light came on. I'm taking it into Mitsu tomorrow ... see what they have to say about it. It'll be interesting to hear their response since I know it's P0300. I'll try to post more information as I receive it.
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Old Dec 31, 2003 | 08:46 AM
  #22  
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Going in next week on Tuesday, will report back... appeared the Service Tech wanted to look at it this morning immediately but his boss said no
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Old Dec 31, 2003 | 03:10 PM
  #23  
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LATEST INFO...

Spoke with my friend at the dealer. He stated there is no TSB out for this problem. This is all word of mouth from to the DSM's, Service Managers, down to the techs.

He said is working on the reflash for it right now. And they are instructed to replace the tranny on a case by case basis (and they must be brought in on a hook).

That's all for now.
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Old Dec 31, 2003 | 04:03 PM
  #24  
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im sorry to sound objective but after completely rebuilding an Evo tranny I can't imagine that the tranny has any connection with a misfire code. This sounds completely nuts! If in fact the ecu is picking up "interference" from the tranny , then the ecu program that detects misfire would have to be reconfigured for a less sensitive pick up. This type of reprograming has been done before for many cars that code up with codes that are being produced by overly sensitive ecu's. I get the misfire code on a continuous basis.
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Old Dec 31, 2003 | 04:57 PM
  #25  
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Replace the trany or the center Dif/Transfercase??? I had a used ford tarus (wifes car) and the previous owner never replaced the autotrans (the infamous class action suit ford lost) so I think I'm ok when the trans finaly lets go @ 34K (but 6 years old) miles WRONG.... if the orig owner didn't complain enough to get it fixed or it wasn't fixed within 4 years (we bought it a@ 6 years) ford gets a get out of jail free card. (Maybe thats why I love beating up on mustangs around here ) My car is modded but I have a service order in from before anything was done to the car....
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Old Jan 1, 2004 | 01:13 AM
  #26  
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Originally posted by superz
im sorry to sound objective but after completely rebuilding an Evo tranny I can't imagine that the tranny has any connection with a misfire code. This sounds completely nuts! If in fact the ecu is picking up "interference" from the tranny , then the ecu program that detects misfire would have to be reconfigured for a less sensitive pick up. This type of reprograming has been done before for many cars that code up with codes that are being produced by overly sensitive ecu's. I get the misfire code on a continuous basis.
either. It might not have anything to do with it after all. I know he did say they have already replaced a few trannys (nationwide) already. You got me? But I'll give an update if anything changes.

BTW- did you read RaX's quote on the first page? Maybe there is some truth and logic to this based on that quote and putting the two together, but I'm no technical wizard who could, or even want to figure it out. Maybe Shiv or Al could shead some light on that?

Last edited by WILDMAN; Jan 2, 2004 at 09:59 AM.
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Old Jan 2, 2004 | 10:00 AM
  #27  
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Old Jan 4, 2004 | 02:10 PM
  #28  
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I am sorry, what is a Cel and TSB? My car is still at the dealer, and they still have no answer, I personally feel If they have to rebulid anything on a brand new car, I want my money back, I love my car but the STI is sounding pretty good about now, they have had my car over a week and it is still not fixed!!!
I AM WONDERING HOW MANY PEOPLE ARE HAVING THESE PROBLEMS(ALL OF THEM) ITS SEEM TO ME OUT OF 7,000 CARS THERE ARE A FEW TO MANY?
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Old Jan 4, 2004 | 02:29 PM
  #29  
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CEL - Check engine light, also known as SES (Service engine Soon)

TSB - Technical Service Bulletin.. any revisions or problems discovered with a particular car are discussed in a TSB (Usually associated with a Recall but not exclusively)

And this site has a biased ownership of this car.. Many are technically savvy and the problems represent a higher concentration of what is really happening across all of the cars. However since people on here are generally more knowledgable (and generally younger) these problems seem to happen more frequently due to abuse or modifications of the cars (With a few issues showing up for no reason whatsoever)

So take everything with a grain of salt.. Truth is problems are a vocal minority.. There's an old saying about doing business.. "Give someone a good product, and they will tell their friends, give them a problem, and they tell Everyone.. "

Keep this in mind when you read through the forums..
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Old Jan 4, 2004 | 02:31 PM
  #30  
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Let me add that I've had MANY cars over the years.. and unless my cars had been in for regular service, it usually can take a week or more to get it back from the dealer. Don't let that be an indicator of bad service.
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