ATTN: weldon 600-A pump owners
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On The Tree
Joined: Jun 2002
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From: Jacksonville,FL
ATTN: weldon 600-A pump owners I got the full fuel system from Nasty Performance and when I first installed the system, i would build up fuel pressure in the lines and when the pump shut off the pressure would hold. Now, when the pump is off, the pressure bleeds off instantainiously. I check the lines and injectors and they are all fine. I have no leaks. I was thinking it was the internal check valve or something to do with the pump. I emailed weldon and the tech replied saying there is no check valve in the pump and pressure will bleed off. Since the pressure bleeds off so quickly now, I have to wait like 3-5 sec. for the pump to prime the lines first before cranking the car or it will just turnover and over due to the lack of fuel pressure. Something just isn't adding up. All those with the weldon pump, do you have to wait when cranking your car or does it start right up? If you turn your car on (not cranking) and let the pump prime, when the pump turns off, does your pressure compleatly disappear or do the lines hold some pressure when the car is off? Please help, Thanks -Andrew
Thread Starter
On The Tree
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From: Jacksonville,FL
anyone with a 600-A? I could just put in a check valve but the part that concerns me is that the pump initially held fuel pressure. I would like to know what others are doing.
Originally Posted by andyws6
I got the full fuel system from Nasty Performance and when I first installed the system, i would build up fuel pressure in the lines and when the pump shut off the pressure would hold. Now, when the pump is off, the pressure bleeds off instantainiously. I check the lines and injectors and they are all fine. I have no leaks. I was thinking it was the internal check valve or something to do with the pump. I emailed weldon and the tech replied saying there is no check valve in the pump and pressure will bleed off. Since the pressure bleeds off so quickly now, I have to wait like 3-5 sec. for the pump to prime the lines first before cranking the car or it will just turnover and over due to the lack of fuel pressure. Something just isn't adding up. All those with the weldon pump, do you have to wait when cranking your car or does it start right up? If you turn your car on (not cranking) and let the pump prime, when the pump turns off, does your pressure compleatly disappear or do the lines hold some pressure when the car is off? Please help, Thanks -Andrew
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From: Jacksonville,FL
I know that is the case but I am just confused as to why it initially held pressure and now it does not. The pressure bleeds off in an instant, not just over time. The fuel pressure literally drops to Zero as soon as the pump turns off. It didn't do that at first. If it was never ment to hold pressure, then why did it initially? That is what's bothering me, that is the real question. -Andrew
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On The Tree
Joined: Jun 2002
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From: Jacksonville,FL
Originally Posted by Blown408
I checked mine last night, and it does the same thing. I have never noticed it before though.
