OK here goes, '85 190E 2.3 Automatic. When started cold engine starts and dies immediately. After about five starts engine will remain running for short period of time. Five more starts and the engine is warm enought to begin to idle. If at any time the throttle is actuated before the engine has warmed the car dies immediately.

The temp sensor seems to be working (resistance drops as engine warms), although unplugging the temp sensor does not seem to affect the starting problem. The Aux air loop motor functions when direct powered (can see the opening move.) Unplugging the EHA also does not seem to affect the cold starting condition.

Any ideas before i do the full on fuel pressure test rigamarole?

Thanks in advance.

~K

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Kyle Fitzpatrick
Materials Engineer

1969 300SEL 6.3
1992 300E
1994 E320 Touring

testing the cold start valve. although it seldom causes trouble this sure sounds like it is not reporting for work.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I did not test the cold start vavle because I thought this only actuated during cranking and for up to 12 sec following starting. If this is truly the case it would seem like the car is starting on fuel provided by the cold start valve and then quickly dying.

~K

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Kyle Fitzpatrick
Materials Engineer

1969 300SEL 6.3
1992 300E
1994 E320 Touring

I'd do a general trouble shoot like look at O2 wire to make sure it's not shorted and maybe check the fuel relay located behind the battery to make sure it has no circular cracks on the circuit board. What about OVP relay?

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Earl



1993 190E 2.3
2000 Toyota 4x4 Tundra

I guess that I should also mention that once the car appraoches operating temperature it runs just fine. It will also start up just fine if it is warm.

I guess I just assumed that bacause the thing runs OK when warm the the OVP and other relays are good. Maybe this is a bad assumption. I'll check those too.

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Kyle Fitzpatrick
Materials Engineer

1969 300SEL 6.3
1992 300E
1994 E320 Touring

Substitute 190E for 300E
http://www.peachparts.com/shopforum/showpost.php?p=1029163&postcount=2

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles

I've got a 1985 230 CE (Euro coupe) with the hard starting / no starting problem. It's got spark and I can smell gas. It just turns over and over without starting. Sometimes it wants to sputter and run, but immediately dies.

I've looked for the OVP fuse, but can't seem to find it. The battery is against the firewall on the passenger side, but there is nothing behind the battery. No box, no cover of any kind. There is a wiring harness that enters the firewall here, but no access to anything.

Any ideas out there? The 230 CE supposedly has the same engine as a 190E 2.3, but apparently the location of stuff like this is different.

Its probably a different type of circuit on the W123.

Wildmen did you solve the problem of hard starting? I have 280SL Euro with same problem. My engine will start but run for a second and die. When I open little the air flow sensor plate than engine start and run fine and after worm up can be start without any problem. Thanks for any help.

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Roman
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87 300SDL 152K
86 420SEL 228K
83 280SL 145K (5 spd)
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that sounds like a cold start injector to me. then again i could be wrong.

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