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Old 03-12-2012, 03:43 PM
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Location: Gilroy CA
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low idle RPM

Hi, I have a 1994 S350 and just rebuild the turbocharger, before the rebuild the rpm was at 650 always now that the turbo is working normal the rpm is at down at 400 I donít know what is causing that? Some times at start up (warm engine) is running at 650 and sometimes at the traffic light it runs at normal 650 rpm the question is where do I start looking for what might be causing this?
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1994 ~ S350 Turbodiesel OM603


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1998 Monaco Dynasty 40'
1981 300 SD Turbo 300,000 I Had to let go after 14 years of flowles service.
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Old 03-12-2012, 04:24 PM
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More info that I forgot

Quote:
Originally Posted by inventor View Post
Hi, I have a 1994 S350 and just rebuild the turbocharger, before the rebuild the rpm was at 650 always now that the turbo is working normal the rpm is at down at 400 I donít know what is causing that? Some times at start up (warm engine) is running at 650 and sometimes at the traffic light it runs at normal 650 rpm the question is where do I start looking for what might be causing this?

I forgot to add what I tried or check or fix so far instead of editing the last post.
I fix the EGR leaking vacuum line, remove and check vacuum control valve (not damaged) and fix the Fuel thermostat non of the repairs made any difference.
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1994 ~ S350 Turbodiesel OM603


~~~~~~~~~~~~~~~~~~~~~~~~
1998 Monaco Dynasty 40'
1981 300 SD Turbo 300,000 I Had to let go after 14 years of flowles service.
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