1995 E320 running way too rich
WHat to check first?
tia Lou. |
You should get the codes read and that might tell you the problem.
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Thanks for the reply Chris. No codes, no MIL or SES on dash either.
Sorry, I forgot to mention. |
The mass airflow sensor might be your problem.
They make a spray cleaner I used once with success. But you should wait for one of the more experienced guys to answer. |
Ok
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Bueler?
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I would think a dirty/worn MAF would cause a lean condition. Does that car have a OBDII connector on it? If not then I don't know how you would read any PID's or codes. If it was OBDII then you could read the fuel trims and O2 voltages. My guess is a bad O2 sensor. How do you know it is very rich?
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Faulty engine temperature sensor . Sending wrong information to ecu .ECU will make it rich if it stuck and not leaning off the mixture after its hot. Do a check on it with a dmm.
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What's going on to suggest you are running rich?
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Strong fuel smell and black soot on exhaust pipe
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My car is OBDI not OBDII
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Check out the thread and the links in the thread that I provided. It shows how to build the LED code reader and how to use it. And buried in there is a pdf copy of the code book that includes your model. This book is slightly too large to link in this forum.
http://www.peachparts.com/shopforum/tech-help/107630-e320-16-pin-dtc-charts-inc-pin-8-pin-14-a.html |
Check the fuel pressure regulator , a vacuum line runs from it to the intake manifold removed it and check if fuel is being sucked into engine , its located at front of fuel rail round with a c clip holding it in , I just found out my 94 e 320 s was leaking , failed smog because of excess hc, replaced it and passed smog check
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