[ether_joe]

with help from the intrepid JosephSC this weekend. . . I have a definitive answer for my 6-minute 6100-rpm cutoff.



Here's what I found. I looked at the DME and, lo and behold, I * do* have the early model. Then opened that sucker up and. . . lo and behold. . . a 'Superchips' brand chip!



Once again Joe to the rescue with a stock chip 968 he had and. . . FIXED!!!! YESSSS! <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />



So no new brain, just back to old chip and presto! Singing all the way to 6800. Man life is good!



Thanks to everybody for help, suggestions and especially Mr. Chen, what a guy.

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[flash]

cool - ok - now we need to know yoru serial number - trying to figure out the point at which they switched



you have a pm

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[Renalicious]

Speaking of looking at the DME, anyone know of a good DIY guide? I know I saw one somewhere out there. I just don't wanna mess around there too much without knowing what I can or can't unscrew.

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[ether_joe]

it's pretty simple once you have the cover off. Biggest challenge for me was getting the little legs lined up if any of them have bent, and taking the chip out straight without bending the pins.

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[ether_joe]

by serial number you mean VIN yes? I am 0116 in the '92 run. . . I can get you the full VIN if you need it.

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[ds968]

Sean,

great news. wooo-hoo !

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[ether_joe]

thanks man.



Hey Joe - if you get a chance to post some of those pics it would be great for reference.

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[josephsc]

Oh yea... I forgot about the pictures. They still on my camera and I left it up north -- I'll posted them when I'm back tomorrow night.

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[josephsc]

By the way, here are a couple of pics.



The first is the comparison of the two DME cases. On the left is the early DME from ether_joe's '92 car. On the right is the late DME from my car (originally came from a '94 968).



The second is the evil aftermarket chip that was causing the failure mode kicking in at ~6000rpm.

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[flash]

actually, those are both late DMEs - the part number you are looking for to tell is 0261.203.070

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[josephsc]

They both have 0 261 203 070 on them. The '92 DME has Porsche parts number 944.618.123.01 while the '94 DME has 944.618.123.02 -- we figured since *.01 is earlier part than *.02, it's also the kind of early DME that caused chips to not work well.



It's also possible that the chip that was in there, "superchips", was just bad. At any rate, problem solved!

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[flash]

the early dme number is 0261.200.474 (not positive from memory about last 3 digits, but sure about the rest)



there are 2 versioins of the late DME "assembly" - they had different chips - the "middle version" had the early chip in the late DME - this looks like what sean had

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[odb812]

Sean, how did you find out that your car is #56? I have a vin 0076 and i haven't been able to find out where i fall in the run.

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[flash]

that would make you #16 - the first 60 of each year were in house numbers

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[Bob Kovacs]

[quote name='Renalicious' date='May 15 2006, 06:35 PM']Speaking of looking at the DME, anyone know of a good DIY guide? I know I saw one somewhere out there. I just don't wanna mess around there too much without knowing what I can or can't unscrew.

[right][post="21027"]<{POST_SNAPBACK}>[/post][/right][/quote]

There was an article in the May 2006 issue of Excellence magazine about replacing the DME chip in a 968, with all the how-to steps and complete with pictures. Don't ask me how I know...



--Bob

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