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  #16  
Old 01-28-2003, 11:15 PM
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Join Date: May 2000
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Dave,

Its your call/money. How often is it acting up? If its not too frequent I would just drive it.

Tinker
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  #17  
Old 01-28-2003, 11:34 PM
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Join Date: Nov 2002
Location: Charlotte, NC
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Tinker,
Good point. It has really only been a problem that one time. I thinks will save this info and buy the part once it becomes a problem.

Thanks for all the great feedback!
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Dave McDaniel
Charlotte, North Carolina
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  #18  
Old 01-29-2003, 01:40 AM
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I personally don't think you need an air flow sensor. You mentioned that you have about 100k on the car. I would like to know how your sensor look like. Is it the one with the plate on top. Let me know and I will explain things better on how to check it. Also, I don't understand how a fuel injection system is cleaned. I am a test enginner in fuel systems working for a major German company. and anyone tells you that it can be cleaned, he is FULL OF CRAP. The best thing you could do to the injector to clean is remove the carbon from around the needle (for digital injectors). I run fuel delivery maps on injectors out of engines every day. Anyway, give more details to better understand your problem.
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1993 190E 2.6
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  #19  
Old 01-29-2003, 10:34 AM
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Join Date: Dec 2000
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Just had mine replaced in the 98 e 430. Was running fine but the engine light came on. Done under warrenty. They told me all it takes is a fine piece of sand or dirt to go on this censor to make it malfunction. Also keep your air box clean on the inside and make sure all conections are proper leading into the intake and that the filter sits correctly with no gaps.
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  #20  
Old 01-29-2003, 01:55 PM
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Join Date: Feb 2002
Location: Chicago, IL
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Mechanical injectors?

I have a 1985 SL500 Euro with an "Air Flow Sensor Plate".

I want to clean these injectors. Is this possible? Are there swabs? What would the ID be?

Steve
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1985 Mercedes 500SL Euro (Gray market)
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1992 BMW 525it Wagon
1994 Honda Del Sol Si
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  #21  
Old 01-29-2003, 02:33 PM
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Join Date: Jul 2001
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"I am a test enginner in fuel systems working for a major German company. and anyone tells you that it can be cleaned, he is FULL OF CRAP. The best thing you could do to the injector to clean is remove the carbon from around the needle (for digital injectors)."

Again, this is a CIS injection system. Since it is not direct injection, I don't see how carbon can form unless intake backfires are a problem. Since the injection is continuous, there is nothing 'digital' about the injectors - they have an input check valve that should shut down at a specified minimum pressure, and an outlet valve that agitates and atomizes the fuel. Either can malfunction due to residue and can be cleaned, though only with specialized fittings and equipment. Since they are mechanically much simpler and cheaper to make than solenoid injectors, replacement is probably cheaper than the cleaning charge would be, if they are faulty.

Also, if you are referring to cleaning the rest of the CIS system, cleaning can be a very successful repair and diagnostic. Unlike the case with pulsed injection, which mechanically is comprised just of a constant pressure regulator and fuel supply tube. With CIS, the airflow sensor/fuel distributor is more mechanically complex even than most carburetors - and as likely to gum up and profit from cleaning.

Steve
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