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Old 09-24-2014, 10:34 AM
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Join Date: Aug 2010
Posts: 34
M104 loses power/ feels "stuck" after holding throttle

Hello everyone,

I'm hoping to get some insight on a problem I am having in my m104(from '95 e320) swapped 190e.

The problem is as such:

The car drives fine. Shifts fine. BUT if I hold a gear (it's manual) and stay on the throttle (not necessarily full throttle) for longer than a few seconds, it hits a wall, and then seems like it's in limp mode. It still drives, but feels like something is "stuck" and is making it harder for it to drive. Literally feels like I'm towing something.
Note: I do not have a diagnostic module connected. I plan on getting one this weekend if someone says that it's directly related, but I am simply not sure.

Also, If I shut the car off and restart it (even if it's moving) it's right back to normal, until I choose to stay on the throttle to hold out a gear a bit longer than a few seconds. Maybe that will give the gurus some hints

Any insight is appreciated.
Thanks in advance.

Last edited by isved; 09-24-2014 at 12:38 PM.
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Old 09-24-2014, 03:53 PM
Registered User
Join Date: Mar 2003
Location: Milwaukee Wisconsin
Posts: 1,150
Dirty fuel filter?
Resistance is Futile.
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Old 09-24-2014, 03:57 PM
Registered User
Join Date: Aug 2010
Posts: 34
Possible. I'll replace it this weekend. I was just thinking it was somehow ecu or MAF related since the problem goes away once I restart the car and was hoping someone had the same issue that found the problem before I explore all possible avenues.
Thanks for the note though!
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Old 09-24-2014, 05:47 PM
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Join Date: Jan 2012
Posts: 7,515
Is this a new problem or something that has occurred since the swap? Does this have full electronic throttle or the mix between cable / rod and electric?

I know the older CIS systems ( 91 300SL for example ) push the throttle back at the driver when the ASR activates, not sure about the HFM-SFI systems. 97 ME 2.0 / 2.1 systems are full electronic throttle with the accelerator pedal a pair of pots.

Are you aware of the crumbling insulation circa 92 - 95?

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