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boyt911sc boyt911sc is offline
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Join Date: Mar 2002
Location: Philadelphia, PA
Posts: 9,731
WUR and DV tests..........


The package arrived last Friday with the WUR and DV but was not able to do the tests till Sunday evening because of family affair. There is good news and bad news. The decel valve is good and working. It opens up @17 Hg. I prefer to have a higher vac reading and adjustment could be made. This is the good news.

The bad news:

Is this WUR you sent to me the same one that you were testing in your car? Why is the cold control fuel pressure @ 70F is 50 psi. (3.45 bar)? This is equivalent to the WCP (warm control pressure). The vacuum diaphragm is not leaking but could only pull 4 psi. (0.30 bar). You need twice as much like 0.7~0.8 bar vacuum enrichment.

Have not done anything on this WUR except did the pressure tests. Please let me understand why the cold control fuel pressure is so much different from your data. Keep us posted.

Old 09-24-2018, 02:54 PM
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