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  #1  
Old 07-21-2004, 04:53 PM
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Join Date: Apr 2002
Location: Melbourne, Australia
Posts: 280
Unhappy hard starting

I have a 1994 C180 with 198000kms which starts 1st time everytime. My other is a 1997 C180 with 224000kms, newer in age and drives a lot better with the 5sp auto, but it needs 2 turns of the starter before it runs properly. First turn, it fires and runs, then it burps (like) , a pause in firing, then it either goes on or dies. If it dies, the second turn will get it going with no further problems. This happens mainly on cold starts any time of day. Anyone here with any idea of whats happenning? The 1994 has a 2 year old fuel pump and filter, same age plugs, 2 yr old battery and so on. The 1997 was serviced last in February this year. No parts have been changed except for brand new battery, so fuel pump possibly the original. Are any bells ringing in your heads guys besides the high mileage??? Cheers.

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Old 07-21-2004, 07:31 PM
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Join Date: Jul 2004
Location: York, PA
Posts: 621
Mine was simply a temp sensor on my 190E that caused that same problem. Not to familiar wth the new engines and FI in the C line-up as the C230 is under warranty still and I have not needed to get a Service Manual or CD for it yet!
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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....
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  #3  
Old 08-18-2004, 06:04 AM
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Join Date: Aug 2004
Location: Grand Terrace, CA
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ooh

I just got a 190E 2.6, and I am in love with the car except that it has a simlar problem. What temp sensor did you replace (water temp/etc.)? Any info would be much appreciated.
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  #4  
Old 08-18-2004, 08:06 AM
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Join Date: Apr 2002
Location: Melbourne, Australia
Posts: 280
hard starting

Thanks Mctwin and Benzito for your replies. I still reckon its something to do with the fuel delivery because the sparks appear to be firing, but if no fuel comes into the cylinder, it won't burn and the pistons will stop working. I don't think it is the electrical side because the engine works even for the first few seconds. However, the second starting always goes on properly without anymore fuss. So this happens only with a cold start. Does this clue ring any bells out there? My older 1994 C180 has no starting problems as it has a 2yr old fuel pump and filter. How old these are in the 1997 model I don't really know. Maybe they are the original ones??? How can I tell? The service records do not indicate any changes to these parts. Also if I step on the accelerator as soon as the engine fires, it won't die off. So fuel supply is a definite issue here. Thinking hats out again folks, thanks and cheers!
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  #5  
Old 08-18-2004, 03:14 PM
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Join Date: Aug 2004
Location: Grand Terrace, CA
Posts: 50
In, my case, the car starts always, just sometimes it can take some seriously vigorous cranking for a good 10-15 seconds before it responds with any firing. Ofcourse mine is an 89 and has the cis-e semi-mechanical system on it. Even though I'm not completely familiar with the newer benze fi, I can offer some ideas for the newer systems. I know on a lot of other efi setups a water temp sensor, extra cold start injector (plus whatever sensors control the operation of the cold start injector), or o2 sensor. I know from selling parts for a couple years that a lot of times sensors can be off in reading enough to make things miserable without being so off as to set a check engine light. And an engine requires much more fuel to kick over when cold, so a sensor could do it. My car has the classic jetronic family of FI on it, anybody know if these things have a thermo-time switch like other jetronic setups, because I can't find it, or is it controlled by a water temp sensor or some other sensor on the cis-e cars? Any experience on the matter would be great.
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  #6  
Old 08-18-2004, 10:18 PM
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Join Date: Jul 2004
Location: York, PA
Posts: 621
Water Temp Sensor, two pole deal! It controls the CIS-E by telling it what the engine temp is to richen or lean fuel mixture as well as operate the cold start valve! 40 Bucks! It has the two single black poles with the rather bulky connectors that are water tight sealing type. And yes it has everything to do with fuel delivery as I stated it tells the CIS-E Controller the engine temp!

Edit: Hocky yours is FI, ours is CIS-E mechanical Fuel Injection with some electral adjustments and control! The EHA and the cold start injector are about all it does control.

__________________
~Jamie
_________________
2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....
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