[W126 Coupe] Hesitation on Start

[Kirby, Alan (MED US)]

Dick,
Wires are Beru; plugs, cap & rotor are Bosch
How do you check the cold start injector?
The engine does not smell rich on cold start
The car starts slightly faster on cold start if I depress the
accelerator slightly, but not the same as before.
I did the work.

The engine has a rough idle after warming up. This condition existed
prior to the tune up and injector work.

Gary Peck commented in another reply to my initial question:

I had the same problem, turns out it was a defective EHA regulator, the
o rings may be shot, try replacing them first then test for leaks, 90%
odds you will have to replace the EHA not cheap retails for $270.00 in
Canada.

What do you think now?
Thanks in advance for your time and expertise,
Alan


From: Dick Spellman ^lt;no email>
Date: Wed Aug 30 2006 - 16:12:11 EDT


Hi Alan:


A few questions.


Can you provide a list of the mfg. components used for the plugs, wires,

cap and rotor?
Have you checked to see if the cold start injector is firing when the
engine is cold?
Does the engine smell like it's rich on a cold start?
Does the car start faster when you depress the accelerator a bit while
cold cranking?
How's the engine run at idle after a cold start and after having warmed
up?
Did you do the work or an independent shop?


Regards,


Dick


Kirby, Alan (MED US) wrote:


> 1989 560 SEC
> 119k miles
>
> Recent changes:
> Replaced plugs (gap at .039), wires, rotor, cap and air cleaner
> Replaced injectors, holders, ands seals
>
> The car used to start on the first turn over of the engine. Now when
> it's cold, it starts on about the third turnover of the engine.
> When it's warm, it usually starts on the first turnover.
>
> Any ideas??




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