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#1 |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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So over the years I've experienced several fuel related issues mostly related to fuel pumps. Each time getting at the test pig tail for energizing the pumps to test them has been a pain.
Recently I had reason to believe I again had pressure problems and had to find the test pig tail and apply 12v to measure the pressure. Well this time I installed a switch. No change that. I installed two switches to help with this issue.(turns out fuel was not the issue but now I have two helpful switches) The first switch is wired between 12V and the "test pig tail" near the ECM. The second actually goes from the FP2 fuse on the Auxiliary fuse box to a 12v source that is active with the ignition key. This second switch was an idea I had last year when the primary fuel pump stopped working. What I wanted to be able to do was kick in the secondary fuel pump to be able to drive home. Instead I had to get a flatbed out there and have it towed. How embarrassing. Here is were I added the connector into the test pig tail. http://zr1.net/forum/album.php?album...pictureid=1444 Here is the switch that goes to the "test pig tail": http://zr1.net/forum/album.php?album...pictureid=1443 Here is the emergency bypass for the secondary fuel pump should the primary fail. (sorry the image is BIG. You have to scroll over to the right to see the switch and it's label) http://zr1.net/forum/album.php?album...pictureid=1442 Now when/if the primary fuel pump fails I can reach over into the passenger side and pull the switch on. I chose a pull type switch to keep accidental enabling from happening. I noticed that I did not post a pic of the change I made on the schematic. Here it is. Note it is in the Section 8A manual as is shown by the page number. [IMG]
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Scott ![]() Vett owner since 1979._It's about the car and the people Last edited by scottfab; 02-26-2014 at 07:05 PM. |
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#2 |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Hmmm look at this. A new post that does not show up in the search for "New Posts".
Isn't that interesting.
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Scott ![]() Vett owner since 1979._It's about the car and the people |
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#3 |
![]() Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,680
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I like the idea of the secondary pump switch.
Nice. Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
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#4 |
![]() Join Date: Feb 2009
Location: Alexandria, Virginia
Posts: 1,469
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Now this is a cool idea. I need to find my pump test lead. Most of the ones I have seen, its sticking out of the wire loom near the ECM, but not mine. Maybe it got pulled out of the loom and back to the batterey, need to pull the battery and check.
Rich
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1990 Bright Red Coupe #608 380 Stroker, Ported Heads/Intake/Housings/TB Haibeck Secondary Delete Chip / Pete's Cams George Braml Intake / FIC Injectors Coated SW Headers / Corsa Bill Boudreau B/B ZF6 / Viper 4.10 gears Ron Davis Radiator Pioneer AVIC-Z140BH NAV Fikse FM5's 285 / 335 / C6 Brakes WAZOO Member |
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#5 | |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Scott ![]() Vett owner since 1979._It's about the car and the people |
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#6 |
![]() Join Date: Jan 2024
Location: Boston, MA
Posts: 167
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I realize this is 12 years old, but just wanted to say the knowledge is still helpful.
![]() My primary pump left me stranded yesterday and I had to pull the C21 pin from the ECM to limp home on the secondary, but this gives me some ideas to implement. ![]()
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1987: Z51 Coupe, Z51, 4+3, Yellow / Graphite 1994: ZR-1 #150, Admiral Blue / Black 2015: Z06 Coupe, Z07, M7, Arctic White / Red |
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#7 |
![]() Join Date: Sep 2018
Location: Groton, CT
Posts: 379
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I have one of the "emergency" harnesses that the Wazoo group makes. Plugs in between the tank and tank harness when needed. Switches primary pup power to the secondary pump.
Sent from my Pixel 4a (5G) using ZR-1 Net Registry mobile app
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1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige |
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#8 | |
![]() Join Date: Jan 2010
Location: Mystic CT
Posts: 2,620
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Makes a great troubleshooting tool too.... |
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#9 | |
![]() Join Date: Jan 2024
Location: Boston, MA
Posts: 167
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Anyone still have one, or know who in the WAZOO (see what I did there) to reach out to? I wouldn't mind throwing a few bucks their way. ![]() ![]() |
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#10 | |
![]() Join Date: Dec 2020
Location: Sydney, Australia
Posts: 85
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https://www.zr1.net/forum/showthread.php?t=25149 |
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