I have converted my 1990 300SL 5-speed to a '96 C36 engine, took over a year to work out all the electronic bugs, but for the most part everything is working well.
The one thing I have not been able to resolve yet is running against the Rev. Limiter/ Fuel cut-off at 5,600 rpm.
Anybody have any idea what would cause this issue?

TIA

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Harald
1962 180c, 1990 300SL3.6 AMG 5 speed

Which ECU are you running?
Did you bypass the P/N switch to tell it that it's in drive?

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1993 190E 2.6 Sportline

Running the ECU from the C36 and yes, told it that it is in drive. We changed the ETA from ASR to non-ASR and also changed the controller, could the ECU be looking for input from the ASR controller?

Thanks,

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Harald
1962 180c, 1990 300SL3.6 AMG 5 speed

Is it that it will not rev while driving or just in p/n? I am not 100% but I do not think that the ecu cares about asr directly. The 5,600 rpm is the weird part. That is not a limiter speed that I know about. The speed input from vehicle speed may be incorrect for the ecu. What vehicle speed sensor are you using? It may be getting the wrong signal pulses.

The engine pulls strong in any gear until I hit 5,600rpm. I don't think it's the vehicle speed sensor since it is rpm related not at a particular speed.

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Harald
1962 180c, 1990 300SL3.6 AMG 5 speed

Huh. Will the engine still rev past 5600 or is it a hard cut limiter at that point?

Whipple's right, didn't even think about the fact that I don't know of any limiter that stops at that RPM

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1993 190E 2.6 Sportline

found a post on 202 forum about 5600 rpm from traction control. seems like a good bet.

do you have a link to the post? I have searched and cannot find anything.

Thanks,

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Harald
1962 180c, 1990 300SL3.6 AMG 5 speed

It was the w202 forum. Just a short post about running on the dyno. I have had other cars hit limiters on dynos also. Even with the system turned off if the rear wheels are spinning and the fronts are not then at a certain point it shuts down. I do not know exactly what rpm. I would think that if this is it you might be able to recode the ecu for no asr. You would have to code it by the old option codes. Hard to get right. I would probably just try a non asr hfm first and see if it fixes it and then try the coding.

Thanks Whipple, that's what I thought. I will contact Beckmann to see if they can recode it.

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Harald
1962 180c, 1990 300SL3.6 AMG 5 speed