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#1
09-15-2007, 12:01 AM
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1994 e320 high 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 any ideas? 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. 
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#2
09-15-2007, 12:02 AM
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SEND me your vin and email so I can send you some documents. I have some good info on your problem ))
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#3
09-15-2007, 03:01 AM
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#5
09-15-2007, 10:48 AM
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Quote:
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#7
09-15-2007, 12:08 PM
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Check that the cable has a 1/4 slack and that the rug is not bunched up. Both of those will throw Closed Throttle Position code..
also check that the cable is not sticking.. Last edited by Arthur Dalton; 09-15-2007 at 12:19 PM.
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#9
09-15-2007, 07:46 PM
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Check around the base of the gas pedal.. See them get extra mats and rugs , along with dirt and sand, etc..that stops the CTP sw from getting closed, just like the throtle cable can..
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#10
09-15-2007, 08:42 PM
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Does your cruise control work?
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#11
09-15-2007, 08:54 PM
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This is from a thread I started about a year ago..........
Update: the rest of the story..... Problem is back, below is description of problem. Installed rebuilt unit in a 1995 E320 Sedan. Initially the unit operated correctly, 2 days later, operation became intermittent. Symptoms are intermittent high idle speed (1400 RPM in park, 1000 RPM in gear) and inoperative cruise control. (either both symptoms are present, or neither are present. never one without the other) Shutting off the car and restarting will sometimes cure both problems, but they both reoccur. Retrieval of stored fault codes (via impulse code reader, not HHT) consistently yields the following: Diagnostic module: code 6: Idle speed control inoperative ECU module: code 8: Idle speed control (ISC) system at upper or lower control stop HFM SFI module: code 2: EA/CC/ISC control module (N4/1) or Safety contact switch (M16/1s1) or Stop lamp switch or Cruise control switch or Actual value potentiometer or Starter lock-out/back-up lamp switch or engine speed signal or vehicle speed signal or closed throttle position switch or safety relay in EA/CC/ISC control module Out of desperation, I replaced the remanufactured unit with a known working unit pulled from an identical fully functional vehicle. Idle speed/cruise control now work properly. So far, there is no indication of intermittent failure. Returned unit to Beckmann for testing, they confirmed reman unit was defective. (the drive motor was bad) Hope this story helps someone else........................
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#12
09-15-2007, 11:06 PM
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Quote:
Quote:
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A suggestion to DTC posters is to use the NAME of the module being read from the PIN. . . . not just the pin. The reason is simple: In a E320 the diag connector's pin layout is different from that of a S500; 16 vs 38 pins. By talking "function", all confustion is eliminated.
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#13
09-16-2007, 01:25 AM
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I have been noticing also hard shifting in the transmission, and it shifts quickly. you can feel it shift a gear right before you stop.
i am thinking possibly a vaccuum leak might cause it? i checked the cable, it is pretty free.
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