[W126 Coupe] Hesitation while driving

[Richard K. Hallberg]

+1 on Mike's comment.  My 91 sec was intermittently stumbling and would 
quit several times at cold start and before it reached operating temp, 
would miss but not fail as the revs were up.  Everything settled at 
operating temp.  I cleaned the cold start valve till I was blue in the 
face and reseated the FPR - nothing seemed to help.  Jonothan, last 
Friday, adjusted the lambda with a Merc meter, Mike's 3mm allen, and now 
there are no stumbling problems or missing and improved power.

Richard

On 4/26/2010 8:33 AM, Mike R. wrote:

> Mine did that until I turned the fuel injection adjustment 1/4 turn CCW.

> This is the 3mm allen through the air cleaner adjustment. Car stumbled,

> hesitated, dangerous driving across an intersection because unless I used

> LOTS of loud pedal it wasn't going anywhere. That simple adjustment

> transformed the car back into a great machine.

>

> Mike

> -----Original Message-----

> From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]

> On Behalf Of Sean

> Sent: Sunday, April 25, 2010 6:22 PM

> To: Mercedes Coupes Mailing Lists

> Cc: Mercedes Coupes Mailing Lists

> Subject: Re: [W126 Coupe] Hesitation while driving

>

> Right off the line. Hesitates under load I punch it and it acts like

> the fuel filter is clogged. Sputters then goes then sputters again. If

> I only use 10% gas it goes but takes forever to get up to speed.

>

>

>

> On Apr 25, 2010, at 7:28 PM, Dick Spellman<dick.spellman at gmail.com>

> wrote:

>

>    

>> On 4/25/2010 6:54 PM, Sean wrote:

>>      

>>> No fuel leaking. Starts better than before, but when in drive and

>>> driving hesitates.

>>>

>>>        

>> One other question, does it stumble right off the line or after you

>> gain some speed?

>>

>> Dick

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