WUR part number application

[Dfwflyr]

does anyone have a source for the correct part number for the different 3.0L engine years on the warm up regulator? I cant seem to find anything in the thread search. I have a 78sc with a -045 regulator. Pressure is within the envelope but on the high side when i tested it. Now after looking at pelican parts store im not sure if I even have the correct regulator

[Bob Kontak]

Go under CIS components then the cross reference section.

911 CIS Primer - Cross Reference

Looks like yours 045 is correct.

[john walker's workshop]

that's the right one.

[Dfwflyr]

Thanks for the help. It also looks like a 105 will work too. Now i have been told that the heating element cannot be rebuilt but everything else can. IS that accurate? How hard is it to rebuild one yourself?

[ossiblue]

Originally Posted by Dfwflyr

Thanks for the help. It also looks like a 105 will work too. Now i have been told that the heating element cannot be rebuilt but everything else can. IS that accurate? How hard is it to rebuild one yourself?

Just what is the problem with your current WUR? If it's just the pressure being too high, that is easily adjusted but you said yours is still within the range of specs. If the heating element is bad, that is a more complex issue. Rebuilding the unit, outside of the heating element, is very easy--one 0-ring and one gasket (maybe two gaskets if you have certain models.)

There are people on this board who have rebuilt their heating elements, and others who have repaired ones that have had solder breaks, and others who have swapped out heating elements from other WUR's into theirs. Tell us just what is the fault with your WUR and things will be a bit easier to answer.

I guess you need to tell us if your WUR controls the pressure from cold to warm running meaning, do you see the pressure rise during warm up. Your OP implies that it does and, if so, your WUR appears to be functioning correctly. Please clarify this for us as it would be a waste of money to buy a new WUR if yours still functions.

[Bob Kontak]

The insulation on my 089 (I think this is the ROW SC WUR) heating element is crumbling. Maybe more from being jostled from box to box in my shop than from use before I replaced it with the the correct US unit.

I have never heard of someone rebuilding this.

[Dfwflyr]

Im not sure what to think about my issue. My main problem is that my car is running rich and I cannot adjust to mixture any more lean without it stalling. Testing my WUR i got 35 PSI on the first start. 2 minutes later I started it up again and had 68 psi for the rest of the night working on it. i believe 68 psi is too high. I went to work on it yesterday and I got 45psi (cold). I took off the banjo fitting and made sure the screen was clean. I also rang out the connector on the unit and intermittantly got 28 ohms. There was some corrosion on the connector plugs that i tried to clean the best that I could. The intermittant ohms reading and what appears to be high pressure has me concerned. (when I say intermittant I mean open circuit moving to 28 ohms and then back open)

[ossiblue]

Originally Posted by Dfwflyr

Im not sure what to think about my issue. My main problem is that my car is running rich and I cannot adjust to mixture any more lean without it stalling. Testing my WUR i got 35 PSI on the first start. 2 minutes later I started it up again and had 68 psi for the rest of the night working on it. i believe 68 psi is too high. I went to work on it yesterday and I got 45psi (cold). I took off the banjo fitting and made sure the screen was clean. I also rang out the connector on the unit and intermittantly got 28 ohms. There was some corrosion on the connector plugs that i tried to clean the best that I could. The intermittant ohms reading and what appears to be high pressure has me concerned. (when I say intermittant I mean open circuit moving to 28 ohms and then back open)

First, you need to do a proper test of your WUR and get solid numbers. From what you've posted though, your pressures are, indeed, too high. 35psi is ~2.3 bars which is generally too high for ambient temperatures.

Two minutes later, your pressure was 68psi (~4.5 bars) which is too high for warm pressure and is very close to system pressure. Did you test your system pressure?

Even though you cleaned out the screen on the WUR, you still may have a blockage in the return circuit. It sounds like your heating element works as your pressures do change over time.

What I'd suggest is to re-test your WUR pressures and report just how you performed the tests and what were the results. Next, is to be sure the entire return circuit is free-flowing. Fuel pressures are adjustable on the WUR and you can recalibrate the WUR if you can confirm the heating element works and the return fuel circuit is clear.