Zero fuel pressure
Thread Starter
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Elder User
Joined: Mar 2005
Posts: 545
Likes: 0
From: Denison, Tx
Zero fuel pressure
Okay guys need some help and fast, have removed the fuel pressure regulator housing several times swapping the original spring with GDS upgrade then pulling it out and cutting it off per several post here , I installed a pressure gauge and now see I have zero fuel pressure I have tested gauge and it is working. I drilled and tapped the top of filter cap. I jusr removed spring again and noticed it had no spring pressure behind it could I have lost part of the regulator? Seems I remember a post talking about not losing a part behind the spring. Sp[ring is back to the original length and when I put it on to install screws there is no tension from the spring.
Lead Driver
Joined: Nov 2007
Posts: 5,139
Likes: 209
There's another piece(poppet) that should be in there.You should have spring pressure when reinstalling the cover. Look on page 4 of the install instructions for an ITP RR for a picture of what might be the missing piece. Do you think you dropped it on top of the motor? Man, you're havin a rough time.
Lead Driver
Joined: Nov 2007
Posts: 5,139
Likes: 209
I just saw something very interesting. On my original paper install instructions, it clearly states to leave the poppet installed. In the instructions from Dennis' site, it says to remove it. There's been a change, and I might have that piece under the cover.
I'll have to check this out...
I'll have to check this out...
Lead Driver
Joined: Nov 2007
Posts: 5,139
Likes: 209
Hello poppet. Do you have one of these laying in the driveway teppler? This should be in the bore and the spring fits inside the back end.
A buddy let me know that his paper instructions also say to leave this in place when a RR is installed. I can see why it wouldn't be needed, as the web instructions state. It just sits there pressed against the cover by fuel pressure.
A buddy let me know that his paper instructions also say to leave this in place when a RR is installed. I can see why it wouldn't be needed, as the web instructions state. It just sits there pressed against the cover by fuel pressure.
Thread Starter
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Elder User
Joined: Mar 2005
Posts: 545
Likes: 0
From: Denison, Tx
Located the poppett where it fell, installed and once again have fuel pressure, 94psi right now might change the spring out later but for now just enjoying my new working gauge and have plenty pressure. Thanks to everyone here especially William_04_x. What a great resource.
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Lead Driver
Joined: Nov 2007
Posts: 5,139
Likes: 209
Great to hear that you're almost there. 94 psi is simply too much though. I'm sending you a stock spring.
Fuel flows through the heads and is introduced to the injectors through the side of the barrel. If your pressure is too high, these o-rings can be damaged and pressurized fuel can end up down at the combustion seal or up in the head. That can lead to VERY expensive repairs.
Fuel flows through the heads and is introduced to the injectors through the side of the barrel. If your pressure is too high, these o-rings can be damaged and pressurized fuel can end up down at the combustion seal or up in the head. That can lead to VERY expensive repairs.
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