Quote:
Originally Posted by Schulisco
I guess a cold start will be impossible under several ambient temperatures and conditions.
The Warum Up Regulator manages the control pressure of the fuel distributor. FD is required to have a proper managed cp on all driving conditions. It depends on your car which WUR version is installed. Some have a vacuum connection to manage driving on higher altitudes to lean the mixture, some have an additional vacuum connection to manage load on the engine while accelerating to enrichen the mixture. They differ in the control pressure curves depending on the engine. Guess it's a lambda controlled SC? Which model year, which engine code?
When you disconnect O2 the ECU goes into the "limb home mode" with a fixed duty cycle of 50% for the pulse valve on cruise and idle. You'll loose power and buy addtional fuel consumption.
Check the WUR if you got the correct version for your car, let it overhaul and get happy with a nice startiing engine and a fuel efficient and performing car under any conditions.
Thomas
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this is a turbo, I have disconnected the vac/boost port. (because it goes to rich)
I have 3 WUR's if 2 of them both go rich after heat soak, despite being adjustbale.....
I just pulled the Bi-metallic strip out of the 3rd one and will try that