When the E300D decided to do the limp home thing in WY, I had to get to
the SLC dealer and all they could find were five codes that told them
nothing. There were five techs wandering around the car scratching
heads. Reset the EGR and everything was good again. Four and a half
hours, bad donut, weak coffee and I was on my way, no money out of
pocket.
On Friday, July 8, 2005, at 03:52 PM, Marshall Booth wrote:
John Peterson wrote:
So, while I'm at the process of cleaning out the injectors I clean
the banjo fitting- good. Then I check hoses from the Alda to the
vacuum amplifier (blue disk shaped thing) and they let air pass okay.
But here's the strange thing- with the "Y" adapter that attacheds to
the ALDA disconnected the car drives equally slow.
I have 2 2.5's -- this one has less power (although has gotten better
with the purge)
If I disconnect the "Y" at the ALDA, I should see some performance
difference, no? What to check next?
The 300D 2.5, 124.128 is fundamentally similar to earlier diesels, but
it's more complex emission controls make diagnosis of problems more
complex. Sounds like you are in the "limp home" mode (no
turboboost/fuel enrichment). This may be because the EGR is not
properly functioning (it can't easily be disabled as it can be in
earlier diesels) because the pressure sensor has shorted out, the
boost pressure is vented, etc., etc. Check EGR operation.
I'm not sure how useful the computer readouts are. You need to start
by measuring the 0-62 mph acceleration time, then check what boost
pressure to the ALDA actually is (should reach 800 millibar between
1600-2000 rpm under full load with the pedal to the floor).
Disconnecting ANYTHING is likely to do NOTHING or reduce power!
I've attached vacuum diagrams of the 602.96 engines used in 124s with
auto transmissions (will be stripped from the list copy).
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 181Kmi,'87 190D 2.5 199Kmi, '84 190D 2.2 227Kmi, '85 190D
2.0 159Kmi, '87 190D 2.5 turbo 234kmi
Diesel Technical Advisor MBCA, member GWSection
http://www.dhc.net/~pmhack/mercedes/mbooth1.htm
<124.128Vac.pdf>_______________________________________
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--
Clay
Seattle Bioburner
1972 220D - Gump
1995 E300D - Cleo
1987 300SDL - POS - DOA
