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  #1  
Old 12-11-2001, 10:45 AM
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Join Date: Nov 1999
Location: Dallas, TX
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Angry '94 E320 Cold Start

Can you belive it!!??
I had the same problem on my 86 300E. I still have the posts on the board here.

I just got the '94 E320 and........
Now, it s 44F this morning (per outside temp gage) and the car starts after 4 tries and the Check Eng. Light is on.
This is the second time, this happened. Except the last time it did not set a light.
Also, it was 31F the other day and it satrted right up. Whats with the 44F temperature.
Absolultey no warm start problem.

So now what?? Which sensor could be possible causing this. Maybe coolant temp??
Also, what injection system does the 94 E320 have, is it LH Jetronic, or Motronic? I have a pulse counter, (I am still waiting on my manuals) can somebody guide me on the socket, please.

Any help will be greatly appreciated.

Mino
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Mino Erhan Dallas, TX
'97 SL500 40th A.E.
'97 S320
'01 ML320
'85 Peugeot 505 SW
'07 BMW R1200RT
'74 Suzuki GT750
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  #2  
Old 12-11-2001, 11:15 AM
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Join Date: May 2000
Location: Soperton, Ga. USA
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Time to learn all about diagnostics on the E320. Do a search on engine diagnostics on this model, especially post by Auther Dalton. You will find all the info you need to start.
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  #3  
Old 12-11-2001, 08:39 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
Your car has the HFM fuel injection system...The Coolant sensor for the fuel system is the one on the coolant pump near the front of the engine. It is the big black sensor. Not any of the small ones.

The main problems with these are wiring harness breakdown and throttle actuator failure.
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  #4  
Old 12-11-2001, 09:38 PM
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Join Date: Feb 2000
Location: Rancho PV, CA, USA
Posts: 328
Use the search feature for previous engine wiring harness discussions. If yours has not been replaced, start there. Ed
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  #5  
Old 12-12-2001, 12:59 AM
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I would check the easiest first, coolant temp. sensor. The resistance should be around 4K ohm (I am not sure what 44F is in Celsius). The resistance should drop when the temperature increases. At 40C coolant temp. it should be 1K Ohm, at 80C 300 Ohm. These values are from the MB 103 engine manual but they should be the same. If the resistance is infinite replace the sensor.
Good luck.

Alex
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  #6  
Old 12-12-2001, 10:14 AM
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Join Date: Nov 1999
Location: Dallas, TX
Posts: 81
I am going to get the code checked today. I am in the process of ordering the manuals though.
It appears that it would be the temp sensor. I will verify and compare to the 86 300E temp sensor.
Is HFM a BOSCH injection system?
Also engine harness???? My goodness, I have never heard of such a thing going bad, that has to be just a terrible repair, for it to be done right.

Thank you, and I will report back.
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Mino Erhan Dallas, TX
'97 SL500 40th A.E.
'97 S320
'01 ML320
'85 Peugeot 505 SW
'07 BMW R1200RT
'74 Suzuki GT750
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  #7  
Old 12-12-2001, 10:18 AM
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Location: Dallas, TX
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Is there a way to verify whether or not the harness has been replaced? maybe the prior owner has done it under warranty. Car has only 67K.
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Mino Erhan Dallas, TX
'97 SL500 40th A.E.
'97 S320
'01 ML320
'85 Peugeot 505 SW
'07 BMW R1200RT
'74 Suzuki GT750
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