Didn't get too far. After it warmed up for a while, idle speed in park shot up to 1500rpm. 800 in drive. Another set-back. I'm guessing I put the airflow put on incorrectly? Frustrating.

Mike

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

Unplugged the potentiometer and restarted. Idle went to 1500 again, but then bounced back and forth and settle on about 700 in park, 550 in drive. Runs rough with pot unplugged. So I am guessing an adjustemnt needs to be made to the position of the pot. What is the best way to do this? Car running? measure voltage from pins with the connection unplugged?

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

Do it with car running at idle. Slip the plug on the pot part way off, far enough to connect voltmeter to pin 1 and 2 if I remember right. Look for .7 volts +- .25.

whats so bad about the Sears Multimeter???? POS?

ECM arrived and so did the nicer weather. I set the pot back up correctly as per Brew's instructions- everything normal again. Except of course the 10%. Soooo... I am looking at my ECM and it looks like this:

Attached Thumbnails

 

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

the ECM I received looks like this:

THe part numbers are different and are as follows:

The ECM I received has these part #s
Bosch- 0 265 101 018
MBZ- 005 545 2132

the ECM that is currently in my car has these part numbers:
Bosch- 0280 800 364
MBZ- 009 545 1132 [02]

This does not look good.

When I ordered the part I specifically ordered a used 300SE ECM.

Attached Thumbnails

 

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

The new one is a ABS controller. Its amazing how stupid junkyards can be. You would think that since all these parts have definative part numbers writen on them they could look every once in a while. Especially since they ain't got a clue otherwise!

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Well this is just swell. Looks like it will be another week before this ordeal can possibly come to an end.

Thanks for the reply. Mike

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

__________________
2012 E350
2006 Callaway SC560

A real ECM finally arrived today. Bosch part number is the same, but MB part number differs slightly-

ECM currently in car- 009 545 1132 [02]
Part I received - 011 545 0232 [09]

Please tell me this is the right part.

Thanks, Mike

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

correct part should be 0115452932 but that part number has changed alot.

__________________
Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)

The one in my 1990 300E is 011 545 00 32 much like your new one.

Wish I knew what the different numbers mean.

I imagine the place you got it has an interchange manual of some sort.

__________________
2012 E350
2006 Callaway SC560

Just a question, but has the Fuel pressure and fuel pressure regulator been checked?

What about the short harness from the idle speed regulator to the mounting point on the intake runner, these can go bad and contribute to idle weirdness.

I called Bosch yesterday and they told me it was the same part. The guy gave me a bunch of MBZ part numbers and said he didn't know why they changed them as the part was the same.

So I plugged it in.

So far so good. Drove the car hard for a couple of hours and it ran normal again, normal numbers too. Has been starting fine since.

Looks like she's fixed

Thanks to: brewtoo, mhinghrim, steve and others for helping me out. You guys really know your stuff.

Now I can get to work on some smaller problems.

Mike

UK- fuel pressure checked out fine one year ago. Idle seems fine.

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

__________________
2012 E350
2006 Callaway SC560