 Fuel pump options, Staying in its original location |
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| emerygt350 |
 Apr 13 2023, 07:59 PM
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#1
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Advanced Member  Group: Members Posts: 2,883 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States  |
I am having a very specific issue here. Pump no longer holds pressure after shutdown. Original location, original three port pump. It still pumps great when running, but no longer holds pressure. Need to fix that and quick. Do I have to replace it or can it be repaired?
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Replies
| emerygt350 |
Apr 14 2023, 04:13 AM
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#2
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Advanced Member Group: Members Posts: 2,883 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
"Failed Check Valve: The check valve keeps the pressure to the injectors and CSV up after the fuel pump is shut off to prevent vapor voids from forming and speed up starting. A failed check valve may cause some hot starting problems. There has been one report of a failed check valve causing the fuel pump to return all fuel to the tank, with no supply to the injectors. See the URL below for a test procedure."
And that describes my issue (all of a sudden I have extreme hot start issues). I don't have the rich issues I would get from a stuck injector. Sadly the link below pbanders mentions is dead. |
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Posts in this topic
emerygt350 Fuel pump options Apr 13 2023, 07:59 PM
r_towle I would suggest you test the injectors, including ... Apr 13 2023, 08:21 PM r_towle https://members.rennlist.com/pbanders/DJetParts.ht... Apr 13 2023, 08:22 PM emerygt350 This is after shutdown. I will have to check the ... Apr 14 2023, 04:06 AM emerygt350 Hmm seems that "check valve" is debated ... Apr 14 2023, 09:40 AM emerygt350 After an hour, pressure back down to 0. Nothing i... Apr 14 2023, 10:27 AM emerygt350 Engine was nice and hot. Parked. Pressure was 24 ... Apr 14 2023, 10:59 AM r_towle The way to check your injectors is to remove the n... Apr 14 2023, 11:05 AM emerygt350 Or you just remove them from the system like I did... Apr 14 2023, 11:18 AM emerygt350 I think this is some boyles law stuff. The fuel n... Apr 14 2023, 11:22 AM brant I had a 3 port fail this way with the pressure hol... Apr 14 2023, 11:39 AM Olympic 914 Why do you need to have the pressure hold when the... Apr 14 2023, 11:40 AM
wonkipop
Why do you need to have the pressure hold when th... Apr 14 2023, 09:49 PM emerygt350 Is your pump under your engine or has it been relo... Apr 14 2023, 01:24 PM burton73 Well, the factory moved the pump up front under th... Apr 14 2023, 01:59 PM emerygt350 Yes, absolutely. That is what I need to do but my... Apr 14 2023, 02:06 PM wonkipop interesting read @[url=http://www.914world.com/bb... Apr 14 2023, 09:34 PM wonkipop @[url=http://www.914world.com/bbs2/index.php?showu... Apr 16 2023, 11:38 PM emerygt350 Very interesting! I have had stupid old v8s t... Apr 17 2023, 05:19 AM |
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