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carat 3.6
MB Enthusiast
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- May 11, 2011
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- S124 E300d wagon, W124 om606 monster, E46 v8 coupe
What is the part number of your ecu?
Do you have the extra 2 pins?
What is your rev limit when in neutral?
I am going to assume my ECU is the standard USA one, my car is an automatic 94 model manufactured 12/93.
Ill have to test the rev limit when in neutral I know its pretty low.
carat 3.6
MB Enthusiast
- Joined
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- S124 E300d wagon, W124 om606 monster, E46 v8 coupe
The only way to be sure is to check the part number, you'll need to unplug it to check for the extra pin's anyway.
hotrodder
Active Member
Unless you change the gearing getting rid of an any leccy speed limiter is only gonna raise the top speed by what, ~ 5 - 12mph depending on whether it's a 4 or 5 speed? Longer gearing will obviously affect acceleration and might make bugger all difference to top speed. Or even reduce it if the engine doesn't have enough grunt to pull longer gears and you gear it for a theoretical top speed a chunk higher
carat 3.6
MB Enthusiast
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- S124 E300d wagon, W124 om606 monster, E46 v8 coupe
It's to do with the 4000rpm rev limiter.
I fitted an ecu with the pin's to a car that wasn't wired for them, and the ecu think's the car is in park all the time. Swapping back to the normal ecu the engine then rev's fully. I never bothered to check but I would expect they will be tied into the the vss signal somehow.
coupe addict
Active Member
If you are lucky you may find the original part number label still on your loom, close to the ecu and tight up against the point where the loom passes through the firewall - its a paper label looped on like an airline baggage label.
Steve
Steve
I have a new engine harness, has all the tags still on it.
carat 3.6
MB Enthusiast
- Joined
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- 4,035
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- S124 E300d wagon, W124 om606 monster, E46 v8 coupe
That number is 2 digit's too long?
I thought so too, but I called the dealer gave them my VIN and this is the number they gave me as the correct ECU for my car.
Hi,
Early, Japanse specification Subaru Imprezzas were limited to 118mph.
This was done by a physical switch in the speedometer.
When the needle reached 118mph a switch contact was made - this told the ECU to back off.
Maybe the US spec. Mercedes used a similar system.
Chees
Steve
Early, Japanse specification Subaru Imprezzas were limited to 118mph.
This was done by a physical switch in the speedometer.
When the needle reached 118mph a switch contact was made - this told the ECU to back off.
Maybe the US spec. Mercedes used a similar system.
Chees
Steve
That might very well be the case. The UK Benzes are Km or Mph?
carat 3.6
MB Enthusiast
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- May 11, 2011
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- 4,035
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- S124 E300d wagon, W124 om606 monster, E46 v8 coupe
MPH, no limit switches in any Mercedes speedo.
I'd say you need an ecu starting with 017.
bolide
MB Enthusiast
This sounds like a system that's designed to be easy to bypass. It requires additional code in the ECU so Subaru might as well have done the whole job electronically
I suspect they knew their target market and the first thing buyers would do would be to modify the car & remove the limiter
Nick Froome
