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Fuel Pressure Regulator Vacuum Switch

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Fuel Pressure Regulator Vacuum Switch

Postby WestOz » Thu Oct 11, 2018 5:11 pm

I'm trying to source the vacuum switch solenoid that controls the vacuum on the fuel pressure regulator. Online I can find the actual pressure regulator and I can find the fast idle solenoid, but I can't for the life of me find the vacuum switch ;) ;) .

Do any of the gurus out in Club Isuzu world know where I can source one. I was hopeful it as a fleabay item, but apparently not. Doesn't seem to appear on any of the aftermarket auto parts sites either, so maybe I'm searching for the wrong thing.

Engine is a 2.6L 4ZE1 in a 1995 Holden Rodeo Spacecab.

Thanks for any help you can offer.
WestOz
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Re: Fuel Pressure Regulator Vacuum Switch

Postby pig75 » Thu Oct 11, 2018 7:12 pm

92 MU, 91 MU ute, 90 MU, 96 Wizard,2012 Dmax LSU, 14 MUX
Australia's loudest MU
MY SITE MY YouTube SPL 152.3dB
If beef is in beef mince, What is in pet mince?
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Re: Fuel Pressure Regulator Vacuum Switch

Postby pig75 » Thu Oct 11, 2018 7:20 pm

Sorry just hade a look at the pdf it's not for the EFI 2.6
If you show us what the part looks like it will help
92 MU, 91 MU ute, 90 MU, 96 Wizard,2012 Dmax LSU, 14 MUX
Australia's loudest MU
MY SITE MY YouTube SPL 152.3dB
If beef is in beef mince, What is in pet mince?
User avatar
pig75
Site Admin
 
Posts: 1464
Joined: Sat May 09, 2009 7:38 am
Location: Proston
Age: 50
Country: Australia
City: QLD
Vehicle: 90MU, 91MU ute & 92MU, 96 Wizard, 2012 Dmax LSU, 2014 MUX LST

Re: Fuel Pressure Regulator Vacuum Switch

Postby WestOz » Wed Nov 07, 2018 2:38 pm

Ok, managed to find a second hand VSV, but when I pulled mine out it seemed to be working correctly. The problem is the ECU isn't actually triggering the VSV for the fuel pressure regulator. I wired an indicator LED across the VSV and it never gets turned on. The mystery deepens at this point. I don't have the VSV for the canister purge and there is no EGR valve. Doesn't look like there is any place for the EGR valve on the manifold or the tube on the exhaust. In any case with those two parts missing the ECU shows no error codes which I would have expected it should. So let's assume the EGR was removed and the manifolds welded up. To stop the check engine light coming on, could the ECU have been rechipped back in the past so it ignores the missing bits? Was this possible once upon a time? My indicator LED on the wiring for the missing canister purge VSV stays on all the time, which is also incorrect from what I understand. So I'm thinking either the ECU is modified or it's waiting for input from another sensor that is faulty. I have checked the throttle position sensor all ok. Not sure what else it might be looking for. Ideas welcome on all of the above.
WestOz
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Posts: 20
Joined: Tue Feb 25, 2014 10:52 am
Age: 52
Country: Australia
City: Perth
Vehicle: Rodeo Space Cab 2.6


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