Quote:
Originally Posted by H/O Driver
Hey Tony, not too worried about the stampings and changing over to a different WUR. You were upfront with me on this and I was OK with a different WUR built to operate the same as the stock one. If my research is correct, I believe the -022 was for the Euro spec 930's and the -054 was for US versions. How much swapping at the factory, who knows.
My question is the conversion for the adjustment that is on the one you made for me. Do I simply screw it in or do I have to loosen it and tap it down to decrease the pressure?
Shoot, I'm still not convinced it is the WUR even. There is some back pressure on the line going back to the tank. Is there a spec on that? It takes some effort to blow back through mine.
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Bob,
I replaced your WUR-022 with an identical WUR. If I place a tape over the ID number, you can not tell or identify which is which because everything inside and out, including the housings are the same. But the WUR-022 is more expensive than WUR-033 because it was designated for 930 application.
Second, WUR-022 operates completely different from WUR-054 (enrichment is done by the boost). We could get to the detail later.
I am a little bit distracted at the moment because a family member just passed away this morning about 3 hours ago. And we are leaving for Europe in 2 days so there is a lot of discussion going on now.
This is what I like you to do for me:
1). Measure the cold control fuel pressure with the just the 2 fuel pumps running (engine off) and WUR electrical plug disconnected. Test run the FP’s with the pressure gauge attached. This test will only need several seconds to confirm the cold control fuel pressure.
2). Repeat the above test but the return line from the WUR is disconnected and open to atmosphere. Install appropriate fuel lines to collect the fuel (gasoline) during the test. You need just a few seconds and read the gauge and shut it off.
3). If the cold control fuel pressures for the above tests are both high, the WUR is the culprit.
The high CCP you are getting could be the result of restricted return line. We don’t know this until you test and confirm it. If the WUR turns out to be the problem, send it back to me so I could investigate it. I will be back by August 6. The family made a decision a moment ago to proceed with the trip. Schedule the package to arrive on or after August 7.
Had I known earlier about your problem, we could have tested it accordingly. Thanks.
Tony