1994 e320 idle - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 10-10-2007, 09:49 PM Thread Starter
BenzWorld Junior Member
Date registered: Apr 2007
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1994 e320 idle

I have a 1994 e320, I had a problem with the idling, it used to rev up and down.... i changed the spark plugs, wires, mass air flow sensor, some vaccuum lines. but now the idle stays high. i tried adjusting it, but it stays the same. in drive its at about 800, and in park it settle at about 1200 or 1300.
it used to be in drive around 500 and park 700.

I read the codes i got:

code 6 in the built in reader
code 8 in pin 8
code 2 in pin 14

I would like to add that during this problem i did play around with the cables adjustments in the engine compartment and at the gas pedal.
when i turn the a/c on, it goes down a bit.
when i first start the car its at about 700 in drive and a 1000 in park, then a few seconds later, it surges to 900 in drive and 1300 in park.

One major thing I have noticed is that when started first in the morning, instead of revving high till it warms up then idle down, it actually Idles at about 900 in park and climbs up as is warms up.

but aside from all that the idle doesnt go up and down on its own anymore, just high idle and spending more gas.

any ideas?
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post #2 of 2 (permalink) Old 10-10-2007, 09:56 PM
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Date registered: May 2005
Vehicle: '07 GL320CDI
Location: Albuquerque
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First thing to verify is the condition of engine wiring harness.

The ALL fail on these models.

Kent Christensen
'07 GL320CDI
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