ok, so i finally got my fuel pressure tester and hooked it up to my 79 242gt. system pressure is good, but when i open the guage valve, control pressure drops to below 10psi, instead of around 22 where it should be. control pressure did not rise as the pump ran, though i did not start the engine, i just jumped the safety circuit and ran the pump. i am assuming that since control pressure dropped so far the control pressure regulator is done, yes? anyone? i didnt check to make sure that voltage was getting to the CPR, i figured it didnt really matter, the electrical connector is attached to a heating coil to help the CPR respond faster to warm up, right? so it shouldn't make a difference for cold control pressure, only for warm pressure. i could find no visible leaks in the return line to the fuel tank. residual pressure is good. i found it strange that when i was doing my control pressure test the guage read ~10psi, then when i turned off the pump the guage jumped to ~30psi. anyway, ive already taken the leap and ordered myself a new CPR, but i thought id refer to those who know more about this than i do and seak out justification for ordering a $350 dealer part. thanks for any help.
prendergast

You sound like you understand what should be happening with the control pressure, but it might help to confirm the failure to know that the pressure won't rise even with the heater effect** (should only take about 2 minutes).

I'm assuming the Line pressure was OK (at least 65-70 psi)?

I may have a used 004 you could try — 0 438 140 004 is right for '79 I believe.

Unless the price took a recent jump, dealer price was $221.25, and VCOA members get 10% to 20% discount at some participating dealers.

FCPGroton has rebuilt CPR's (WUR's) for $69 + $30 core charge, but I don't know how good they are. Depending on where you are, RPR in Albany CA is a good place too.

** you don't say how you are running the pumps, but just jumpering fuse 7 to 5, or relay 30 to 87 won't put +12V to the WUR heater. You need a "Y" jumper to take +12V from relay harness plug 30 to BOTH 87 AND 87b (blue wire).
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.

you're right, i ran the pump by jumping relay 30 to 87. i didnt know that this doesnt supply voltage to the WUR heater, but i thought that might be the case. today ill test for voltage with the engine running or ill try a Y jumper. line pressure is good, new fuel pump, new fuel filter. i probably should have specified this, but its $350 Canadian, after taxes, yikes i know, we have alot of taxes.
cheers,
prendergast