Rough idle at cold start

Oct 28, 2012 | 08:51 AM

hasse_231

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c32 amg evosport stage 2

Rough idle at cold start

Hello

I wondering if its normal with rough idle at cold start ? is seems almost to missfire a little in the begining but allt the times its gone when its warm.

Is that normal or is it a problem i do have ?

The plugs are changed ?

Wire problem ? or only when the airpump work it makes the engine more rough ?

Oct 28, 2012 | 09:01 AM

GT-ER

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From: Puerto Rico

2005 E55 AMG

I had this happen a while back, my idle was too rich. How are your long term fuel trims?

Oct 28, 2012 | 09:08 AM

hasse_231

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c32 amg evosport stage 2

I is thinking to uppgrade the fuel rail and the injectors.

Asp pulley 180 mm
Evosport Shorty headers
82 mm Thottle body oe mercedes 550
Cooling upgrade eurocharged
Injectros eurocharged
Fuel rail
And maybe evosport wires if its solve my problem with the idle ?

Did you solve the problem ? or did its diseappear with the uppgrades ?

Oct 28, 2012 | 09:09 AM

hasse_231

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c32 amg evosport stage 2

Now its original no mods at all with out my heavy right foot

Oct 28, 2012 | 09:32 AM

GT-ER

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From: Puerto Rico

2005 E55 AMG

If your car is 100% stock then you have a problem. In my case it was after installing the larger injectors but Jerry fixed the tune and it runs great now.

Oct 28, 2012 | 12:13 PM

hasse_231

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c32 amg evosport stage 2

Okej any suggestion ? There no fault codes at all only that the car going on all eight cylinders but rough and rpm goes up maybe 50rpm and down two times and then it works just fine.

Oct 28, 2012 | 02:27 PM

bstudey01

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From: Racine, WI

2003 E55 AMG

Quote:

Originally Posted by GT-ER

If your car is 100% stock then you have a problem. In my case it was after installing the larger injectors but Jerry fixed the tune and it runs great now.

What was your car doing when you had problems. Mine has had some issues as well after larger injectors, EV 14 550cc's, you can see all my mods in the signature. Usually after a cold start with very light throttle it will start to buck, RPMs jump 200-500. Doesn't happen all the time, very spurratic. No codes. Just installed Zeitronix AFR and Dashdaq to see what is going on but it hasn't happened yet since I've installed. What exactly was happening with your? What did Jerry do to fix?