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MB Paul
MB Paul, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3567
Experience:  Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes
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S420: I HAVE A 1995 MERCEDES S 420. BURNING VERY RICH WITH

Customer Question

I HAVE A 1995 MERCEDES S 420. BURNING VERY RICH WITH HEAVY FUEL SMELL AND LACKS POWER. TESTED FOR CODES WITH SNAP ON TEST UNIT AND SHOWED CODE 19 INJECTORS LH1 SFI. REPLACED MASS SENSOR AND 0/2 SENSOR. ERASED CODE AND RAN VEHICLE. THE SAME PROBLEM. FUEL PRESSURE IS OK AT 3.4 BARS. ALL FIRING LINES IN IGNITION SYSTEM SEEM OK. THE ENGINE HARNESS HAS BEEN REPLACED ALSO.
Submitted: 1 year ago.
Category: Mercedes
Customer: replied 1 year ago.
(Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 1 year ago.
Please phone me if possible.(###) ###-####Thank you.
Expert:  Juan Crespo replied 1 year ago.
Hi there. Welcome to our site. I am not familiar with the Snap On test unit you mention, but if you retrieved code 19 from the Diagnostic Module. then chances are you need to reset LH-SFI Control Module adaptation to mean value. Does your vehicle have the push-button LED diagnostic box?If you would like me to call you, the site requires that you first accept the Additional Service Offer for the phone call. Best Regards.

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