[xrad]

yep ..stock chip...

had an aftermarket chip but it was running too rich for me...lots of carbon on my white rear bumper.

Honestly, after exhaust and intake changes, new plugs/wires, and the Fireball system, this baby has plenty of scoot on stock chip...(not turbo fast, though)

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[RS Barn]

Chips only affect wide open throttle. AAny other problem isn't related to chip
Pete

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[xrad]

Pete: what do you mean "chips only effect wide open throttle"? What you say could be right, but it does not make much sense in terms of overall performance enhancement (which several chip manufacturers advertise)... for ig timing , A/F, over wide range of RPM's

Unless this is the big cover-up by aftermarket chip programmers????? [img]style_emoticons/<#EMO_DIR#>/mad.gif[/img]

I think autoauthority chip affected advance and A/F mixture over a wide range and run rich at most map points. I think this because I rarely floored it (back when I first bought the car..still getting used to her) and for a month I was cleaning soot off...... then switched back to the stock chip and soot gone

several months after this, I changed out the O2 sensor and spark plugs which really did not do much in terms of the already corrected 'soot.'

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[Davbert55]

I didn't read a solution to the problem mentioned in this thread. I have the same issue of being rev limited at 6,000. Street or track. Pump gas. No diagnostic codes. However, I occasionally (not associated with the rev limiter) get a brief master warning light with no discrete system warning light. I just attributed that to a brake fluid or oil level sender bouncing due to hard driving. No other drivability issues. Any help is appreciated.

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[Davbert55]

Ha, there is more to the story. Over coffee this AM I decided to read the instructions. There is a good DME diagnostic section in the 968 manual. Right there in 24/28 page 19 it describes the engine being rev limited to 6000 if the system detects a faulty control unit. That would be for code 1-41. It happens 6 minutes after power up. That is exactly what happens. Prior to timing out it will rev to 6700.



The manual doesn't describe the fault its protecting the engine against. Could it be an external fault masquerading as an internal fault? In addition, There are no posted fault codes. I connected the Durametric and nothing. The part number readout of the computer appeared correct. The signal inputs look correct.



I opened up the motronic control unit to see if there was any damage. Nothing appeared out of the ordinary. At some point in its life someone installed a superchips 968070.512 chip in the car. Could this be the fault detected that is causing the computer to limit RPM?



I never noticed the rev limiting until I started participating in some track days. I want my 700 RPMs back. Any clues or insights would be appreciated.



Dave

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[jaap]

With an aftermarket chip installed I get an error code 1141 which disappears when installing the original chip. I think the DME can detect an aftermarket chip because it misses a specific value (or checksum) in the EEPROM. However the rev limit was not lowered but actuslly raised to aroud 7100 by the aftermakrket chip.



Jaap

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[flash]

i have run into a number of chips that create this problem. it would not surprise me that superchip was one of them. when i spoke to them 11 years ago about making a chip, they were pretty sketchy about their process.



get rid of that chip.

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[ds968]

[quote name='jaap' timestamp='1405934368' post='160364']With an aftermarket chip installed I get an error code 1141 which disappears when installing the original chip. I think the DME can detect an aftermarket chip because it misses a specific value (or checksum) in the EEPROM. However the rev limit was not lowered but actuslly raised to aroud 7100 by the aftermakrket chip.

Jaap[/quote]



Hmm, I did not get any error codes with the Racer X chip which I installed about a year after I bought the car and ran with it for about eight or nine years ..before I SC'd the car. So tne DME might detect and throw a fault code with only certain aftermarket chips , not all ..depending on how they're "burned" I suppose.. ?

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[flash]

yup - it does a check to see if it is correct for the ECU



i actually think i have a superchip around here somewhere. as i remember, it threw the code, and only made 7hp

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[jaap]

I ran the chip for over six years before I discovered the fault code. European cars do not have the CEL but when reading the fault codes directy from the connector I found the code. Not sure if it would trigger the CEL light on a US car? Did not negatively affect the way the car drove at least not that I noticed.



Jaap

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[ds968]

I meant the "blink test" codes, never got any fault reading off of that with the racer X chip in.



LOL, I'm surprised the CEL light would not come on in US cars, that thing is triggered by just about every innocuous issue, in addition to the specific coponent warning lights ..( oil level down a quart, for example ..), unecessarily scaring the s**t out of the driver because you think some massive engine failure just happened.

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[JWahlsten]

My original DME didn't like the RS Barn Chip. Don't know why, and we replaced my DME with another used one, and it's been fine since. So it may not be the chip, but the DME being finicky.

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[Davbert55]

I replaced the superchips 968070.512 with the RS Barn chip for the stock engine. Rev limiter is back to normal. The new chip feels stronger in midrange. The mere fact I get my 700 RPM back makes it a significant performance enhancement.



So here is a question for the group. See the attached photo. The superchips Prom was piggy backed into the circuit card shown. That card was plugged into the mother board. I plugged the RS Barn chip directly to the motherboard per installation instructions. Does anyone have an idea what the accessory card is for? California CARB? Smog chip? Support electronics for the Superchip Prom? I'm curious if that was the source of the rev limiting. The car is reassembled. I have no intention of reinstalling it to find out.

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[flash]

send it to me and i'll see if i can tell you

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[Ab54666]

I had exact same problem with the super chips and daughterboard or whatever it's called over here in the UK. It's just how they did it back in the mid 90's apparently!

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