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ECU Question 1 Month, 3 Weeks ago
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I see people are using different ECUs. I'm running 173, but I see a lot of people using the 153. I tried to search here and on REV forums, but can't seem to figure out what makes them different.
Can anybody help out?
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Re:ECU Question 1 Month, 3 Weeks ago
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153 is an older design which came with 87s (or earlier?) It's a two board design inside the box.
173 is newer and came with 89s(?) and is a single board design with more integrated electronics. Seems to control the idle better.
I was having surging idle problem with my original 153 and finally swapped the DME to 173 (ebay $50) and that solved the problem.
I don't know what other improvements were added to 173s.
That's about all I know.
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Re:ECU Question 1 Month, 3 Weeks ago
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153 = Motronic 1.0
173 = Motronic 1.1
... I think.
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Craig Geiger
#82
Racer X is my Hero
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Re:ECU Question 1 Month, 3 Weeks ago
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TheRedBaron wrote:
153 = Motronic 1.0
173 = Motronic 1.1
... I think.
82 = Moronic
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ScottMc | BeerTech467
"America is all about speed. Hot, nasty, badass speed."
-Eleanor Roosevelt, 1936
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Re:ECU Question 1 Month, 3 Weeks ago
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325i/is/iX E30 M20/B25 (170hp) 87-91 0 261 200 153 Bosch Motronic M1.1
325i/is/iX E30 M20/B25 (170hp) 87-91 0 261 200 173 Bosch Motronic M1.3
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Re:ECU Question 1 Month, 3 Weeks ago
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ok, so essentially they are the same as far as what they do
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Re:ECU Question 1 Month, 3 Weeks ago
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Yeah, interchangeable.
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Craig Geiger
#82
Racer X is my Hero
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Re:ECU Question 1 Month, 3 Weeks ago
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The 153 units had a reputation for some cold solder joints on the boards that caused weird driveability problems. A spare ECU is a good idea no matter what the number.
The motronic 1.3 can flash more codes at you than the 1.1
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