[lampler]

Hello,

I'm racing a 968 -92 in the Porsche Club Sweden Racing. I need some power,

who does not. I have tried 3 diffrent tuning chips but all of them cut out at around 6100 rpm.The company can't do anything or havn't any suggestions. I also have a 968 friend with same trouble. It seems as the chip works when engine is

cold but cut when hot. Have you any experience of this? The engine works perfect( 6800 cut) on the original chips, I have two original ECM boxes and both are OK.



Leif

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[flash]

sounds like your knock sensors might be coming into play, or another control mechanism is causing things to adjust incorrectly - chips generally advance timing as a part of their tuning - if things aren't right, that will create problems



low compression can also cause such issues



also, if you have an early 92 with the early ECU, there are only a couple of chips that work with that



what is the ECU part number of the one you are using?

how old is the O2 sensor?

have you done the blink test to see if you have knock sensor issues?

what octane fuel are you running, and by what measuring method?

is the MAF clean?

what is your compression?

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[Greimann]

Bob, wasn't it you who found out that if the chip program wasn't coded properly that the computer sets a lower rev limit. I remember reading that somewhere.



Mr. Lampler didn't say which chip he was using. Maybe it is not one the of the main stream ones.

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[flash]

good point!



i haven't heard of the problem in quite a while - i had actually forgotten about that



yes, i was told by Steve Dinan that there is an ID code that the DME looks for - if it isn't found, then yes, it will set it lower - all of the major manufacturers have figured out how to enter that code, so it has become pretty much moot, but if it is one of the off-brand chips, or a bad clone, then, yes, it could be the problem



so, let's add that to the question list

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[ether_joe]

[quote name='flash' date='Mar 15 2006, 11:58 AM']also, if you have an early 92 with the early ECU, there are only a couple of chips that work with that[/quote]



dammmmn, you know what, I get cutoff at 6100 and I have an early car. . . does this mean I can't use the racerx/promax/RSBarn chips?



oh nooooo!

<img src="/forum/images/smilies/968/huh.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/ohmy.gif" class="smilie" alt="" />

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[flash]

get me the part number on your ECU - then call me

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[ether_joe]

[quote name='flash' date='Mar 16 2006, 02:57 PM']get me the part number on your ECU - then call me[/quote]



ok - will do - thanks

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[lampler]

[quote name='flash' date='Mar 15 2006, 11:58 AM']sounds like your knock sensors might be coming into play, or another control mechanism is causing things to adjust incorrectly - chips generally advance timing as a part of their tuning - if things aren't right, that will create problems



low compression can also cause such issues



also, if you have an early 92 with the early ECU, there are only a couple of chips that work with that



what is the ECU part number of the one you are using?

how old is the O2 sensor?

have you done the blink test to see if you have knock sensor issues?

what octane fuel are you running, and by what measuring method?

is the MAF clean?

what is your compression?

[right][post="17386"]<{POST_SNAPBACK}>[/post][/right][/quote]

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[lampler]

I have two boxes, same fault on both with tuning chips from Superchips ( UK?) Box no. 944.618.123.01 original chip no. not readable. Box no. 2: 944.618.123.02 with original chips no.1 267 357 459. I'm runnign at 99 Octane europe, RON? How to clean a MAF? I have not tested the knock sensor yet. Compression rather good but not perfect. Thanks for help and info. Acc. to the company that sells the Superchips in Sweden it works on other 968.

Leif

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[flash]

i don't recognize either one of those box numbers - i was looking for either the early one 0261-200-474 or the later one 0261-203-070 - the chip number you specced is the later chip

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[SANDOVAL]

944.618.123.02 Is listed in PET for 92-95 years so I imagine this is the newest version. The number you have Bob is the Motec part number I think.

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[frank moran]

[quote name='SANDOVAL' date='Mar 19 2006, 12:19 AM']944.618.123.02 Is listed in PET for 92-95 years so I imagine this is the newest version. The number you have Bob is the Motec part number I think.

[right][post="17559"]<{POST_SNAPBACK}>[/post][/right][/quote]

I just read on my al data that a code 41 faulty ecm will limit engine rpm to 6K six min. after start up to protect the engine??? may want to check for codes..

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[BBZ 968]

I have recently fitted a Promax chip to my 1992 coupe Tiptronic. The original factory chip has the number...1 267 357 258....No problems as yet .



Cheers Shaun.

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[flash]

wow - an early one! what is the serial number on the car? been trying to figure out the point at which they changed over

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[ether_joe]

Leif - I confirmed today, my 6100 rpm cutoff does NOT happen for about the first 3-5 minutes of operating the car. the engine can be warm, it seems that it has to do with when I turn the car on. I go all the way to 6800 for a few minutes, but then I start getting cut off at 6100 again.



also, I remembered a detail about my car, the distributor cap and rotor need to be changed, the contacts are corroded somewhat.



I wonder if you are having the same symptoms as me?



Anyhow I am going to replace the distributor cap and rotor and see how that changes the game.

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[flash]

have you done a blink test yet?

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[Greimann]

Joe you need to do a blink test. According to the manual, a faulty DME computer could be the problem. <img src="/forum/images/smilies/968/mad.gif" class="smilie" alt="" />

   

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[ether_joe]

[quote name='flash' date='Mar 20 2006, 08:08 AM']have you done a blink test yet?[/quote]



Flash - if you're asking me - I did, and I got 1-5, no fault.



There was a second series of blinks when I did it a second time but it was 1-1. Don't know what that one is. 1-5-1-1 is 'low voltage' or something, so I think I'm getting the second bit wrong. But I definitely got 1-5 the first time.

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[ether_joe]

[quote name='Greimann' date='Mar 20 2006, 08:42 AM']Joe you need to do a blink test. According to the manual, a faulty DME computer could be the problem.  <img src="/forum/images/smilies/968/mad.gif" class="smilie" alt="" />[/quote]



dammnnn new brains are expensive, aren't they?? I'm going to go with the cheap fixes first distributor, o2 sensor, since the car sat for so long, and see where I get with that.



Leif sorry I am hijacking your thread

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[flash]

do a blink test again first - make sure you have a good reading



don't change a thing until you have done that



while it's fine to put in new parts, since you are trying to diagnose something, start with the diagnostic process - establish a nominal condition, identify problems, then move on the cure



then, if the blink test shows nothing, start with simple stuff like you said

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