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Old 11-18-2003, 02:20 PM
Phil M
Posts: n/a
84, 190E gas, runs rich

Just got done rebuilding my 84 190E. Starts and runs very rich. where to look? O2 sensor? Lambda system? Bought car with seized engine, don't have prior history. Also purchased with with dash partly apart. Climate control, and stero out. Could lack of these components not being connected have an effect on the ECU? I am also not 100% sure of vacuum line configuration. From bottom of manifold, large line to charcoal canister T. Second line from manifold to thermal valve (red), from thermal valve T'd to distributor, and charcoal can. diagrams I have show diffirent configuartions and components.

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Old 11-18-2003, 02:57 PM
mike65's Avatar
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Join Date: Oct 2003
Location: Ireland
Posts: 166
Sound like it just needs the fuel/air mixture setting correctly which any decent local garage can do (assuming they have an exhaust gas analyiser thingy) I'm no expert but its proberly good idea to get all the bits connected first.


1990 Euro 190e 2.0l Petrol Now Sold Maybe a w116 280se next
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Old 11-18-2003, 08:09 PM
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Join Date: Nov 2003
Location: Minneapolis, MN
Posts: 23
I think I would start with the Oxygen sensor or one of the pressure sensors. Both of these are referred to in the Haynes manual when it is runnning rich.

Also, have you tried an injector cleaner? May help.

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