[MBZ] '88 126 Hesitation Problems and Intermittent Hard Start

[M.Afzaal Khan]

Hi.  One of the causes for hard start, warm or hot is a failing fuel 
accumulator, so along with a fuel filter change should be good proactive 
maintainance
regards
mak

----- Original Message ----- 
From: "Mark E. Peneguy" <peneguymbz at cox.net>
To: <Mercedes at okiebenz.com>
Sent: Wednesday, June 07, 2006 4:57 AM
Subject: Re: [MBZ] '88 126 Hesitation Problems and Intermittent Hard Start


> The below must have gotten lost in the transfer to
> Mercedes at okiebenz.com.  I wanted to be sure that Peter and Barry knew I
> appreciated their responses. --Mark
>
> Peter:
>
> Along with the other parts, I will consider the idle control valve hose
> as a possible culprit.  I found my receipt and you are correct, the idle
> control valve was replaced.  In addition to the idle control valve hose,
> I have not replaced the throttle position sensor (yet).
>
> With regard to the smoke, the instance I reported was the one and only
> time I have seen it - since I bought the car in 1993.  I had the valve
> seals replaced, along with so much else, when I bought the car.  It has
> performed beautifully with no smoke, since.  Hopefully, that is not the
> issue, though it is something I will have taken under consideration.
>
> Barry:
>
> To have a pressure test on the fuel injection system couldn't hurt, I'm
> sure, particularly with the age of the engine.  Thanks for the suggestion.
>
> With regard to the hard start, I have only noticed it when the engine is
> warm or has attained full operating temperature.  When the engine is
> cold, it seems to start with no trouble.
>
> To all:
>
> I cannot tell you how much I appreciate everyone's advice.  I wish I was
> as knowledgeable as you and could offer advice as you have to me.
> Everyone who has responded has been kind enough to give me one more
> thing to think about as the culprit and a direction in which I may need
> to go.
>
> Mark
> -- 
> __________________
> Mark E. Peneguy
> 1988 420SEL 212k
> New Orleans
> peneguymbz at cox.net
>
>
> > From: Peter Frederick <psfred at earthlink.net>
> >
> > Most likely you have a leaking idle control valve hose (the idle
> control valve is what was replaced).
> >
> > Smoke is likely blue, from worn out valve guide seals, you are due
> for them.  They can make starting slow on a cold engine, since oil leaks
> down into the  combustion chamber and can coat the plugs.  Not a big
> job, but not free as it takes a couple hours.  The leaking idle control
> valve hoses can also make starting slow.
> >
> > Peter
>
>
>
> > From: "Barry Stark" <barrystark at adelphia.net>
> >
> > Mark -
> > Before someone starts replacing parts I suggest that you have them do a
> > pressure test on the fuel injection and make sure that the pressures
> are all
> > in spec. BTW, when it doesn't start, is it only with a warm engine or
> when
> > it is cold as well?
> >
> > Barry
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> From: "Mark E. Peneguy" <peneguy at cox.net>
> Subject: Re: '88 126 Hesitation Problems and Intermittent Hard Start
> Date: Tue, 06 Jun 2006 18:53:59 -0500
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