Smoke in 1 gear

[mauro12]

Hi guys! I hope you can advice me. I noticed that my car especially in strong acceleration in first gear ( I have the zf 5speed) makes a good amount of black smoke. I did the ultrasound cleaning of the enjectors but the problem is the same . My mechanic told me to add with the fuel an additive from Bardahl called "top", it seems to clean all injection pump . You think is good advice? Thank you

[stickandrudderman]

Black smoke = too much fuel and it is almost unheard of for injectors to fail in a way that such smoke is the result.
Have you followed the linkage tour?

[Benz Dr.]

I would start looking for a different mechanic.

[waltklatt]

Or clogged air filter.
Do the linkage tour as StickandRudderman said.
And a different mechanic who knows these old cars and the mechanical fuel system.

[Garry]

The Linkage Tour, the most useful tool in the Tech Manual if you wish to maintain your own car, is only available to Full Members.
 
At the cost  of Full Membership, ($30p.a.) it can save you that much and more alone each year in servicing.  In addition you will also have access to Pagoda Notes, another area for Full Members only. Wiring Diagrams in colour, another Full Members only area.  And if that is not enough to entice you to become a Full Member, there is the collectable Pagoda World that comes out as a full colour magazine twice a year.

Full Membership has its privileges

Garry
Membership Administrator

[TheEngineer]

Is the engine still somewhat cold when you start out? If so, your cold start device still  adds fuel!

[perry113]

Is it strong or loose power at higher rpms?

Are you running the right coil?

[Benz Dr.]

Is the engine still somewhat cold when you start out? If so, your cold start device still  adds fuel!

How could that be? The CSV should only be energized when you use the starter and is supposed to shut off when you disengage it. If you mean that it's leaking then I could agree with that possibility.

More than likely the pump is set  too rich.

[mauro12]

For sure that car is running too rich.. the fuel consumption is about 4km/liter. Can be also the thermostat? Mine for sure is always opened because the car stay always about 75degrees Celsius instead of 90. The only positive thing is that there is not risk of overheating which is very dangerous for this cars especially in my area. Would be perfect to have a scheme of all regulations to do for the linkage and injection pump.

[TheEngineer]

Where is my Italian? 'Fa niente' 4 liter /100Km is too much fuel consumption even on your mountain roads. You should go back to the basic engine tuning adjustments: start with measuring compression, then adjust the linkage from the injection pump to the throttle body. Then check your warm-up device and, like Dr. Benz pointed out, make sure it does not leak. Check the thermostat to make sure the engine runs at about 180 degrees (I think that is about 90 Celsius). You have to do these things in a methodical way and it takes time. Look at the color of your spark plugs: they are a window into your engine and tell you if you are running too rich. Be careful that you do not cross-thread the cylinder head. Stick a rubber hose over the spark plug and thread them in by twisting the rubber hose. Be gentle! These are very nice cars and run wonderful with lots of power but you have to learn how to treat them. Just like an Arabian horse. 

[Garry]

As I said in post #5, Mauro is not a Full Member so cannot access the Linkage Tour that others are suggesting he does.

  Mauro, if you wish to gain access to the Linkage Tour where it is all laid out how to adjust your car to be running perfectly, you need to upgrade your membership to a Full Member. Then you will have full access to the Tech Manual and also receive our Pagoda World twice a year.

Garry
Membership Administrator.

[mauro12]

Thank you for all advices you gave me, I will try to look for a better mechanic in order to solve this problems starting from replacing the thermostat which is always opened and check all linkages.. I will think it over to became full member 

[TheEngineer]

May I suggest that you buy the workshop manual which is published by Mercedes. It is about 2 inches thick (5 cm to you) and has much information. It is well worth the cost. You sometimes find it on eBay. And then you should learn about your car because without that knowledge you cannot judge if a mechanic is competent to work on your car. All the mechanics who used to work on these cars 50 years ago are either dead or retired. Most all the mechanics you talk to will tell you that they are knowledgeable about your car but that is just sales hype. I ran across one 230SL that a woman had left at a specialist for fuel injection: They worked on it and never again could it get started. I adjusted things and had it running in an hour. Got a free dyno run for it.

[stickandrudderman]

Maybe not 50 years ago, but 37 years ago I worked on my first 113 I'm certainly not dead yet!

[Benz Dr.]

Maybe not 50 years ago, but 37 years ago I worked on my first 113 I'm certainly not dead yet!

Ha! You must be about the same age as me: old enough to know better and too young to resist.

[TheEngineer]

Hey! We are talking about cars here, not women!

[stickandrudderman]

Speak for yourself!