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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,267
"Do you agree that even if we disconnected the 12v to the WUR it still gets enough heat the increase control pressure?"

No, I don't think heat transfer from the engine would ever come close to raising CP to full operating temp specs...

The bimetallic springs in both warm up devices get 12 volts continuously from the rear fuel pump relay and they both need it.
When getting 12 volts the WUR is fully warmed up and CP is as high as it will get in about 1-2 minutes after starting the car.

Both mechanical warm up devices are mounted on brackets that partially isolate them from heat soak from the engine case. They get some heat transfer and react to it but not enough, even after driving and then parking and letting it heat soak for 30 minutes on a 95 dgree day in S. Florida.

It's easy to test that.. just unplug the heater element plugs form them and see what happens on a hot day while the engine is hot. Then drive tha car.
The result on mine when doing that is it runs rich from the WUR not getting hot enough and it idles around 1800 rpm from the AAV not getting hot enough.
Old 09-25-2010, 08:23 AM
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