Fuel pressure gauge install, got a problem!
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Elder User
Joined: Mar 2005
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From: Denison, Tx
Fuel pressure gauge install, got a problem!
Okay after having problems with the adapter to convert plug port to 1/8" IPT I decided to drill and tap top of fuel filter cap and attach 1/8" 90 ell. Completed it and installed electrical fuel pressure gauge. started engine and it runs like it has air in fuel and gauge shows zero fuel pressure. could I have an air leak in cap? Would that give me no fuel pressure at the top of fuel filter. I tested gauge with air and it is working.
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Elder User
Joined: Mar 2005
Posts: 545
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From: Denison, Tx
Yes I did an have driven it at least a mile and running better but still not right. tomorrow I plan to pull cap again and oil o'ring reinstall it and torque.
Is there a bypass in the fuel filter so if fuel ressure is low it is diverted past filter.
Still wondering why no fuel pressur at the top of filter cap.
Is there a bypass in the fuel filter so if fuel ressure is low it is diverted past filter.
Still wondering why no fuel pressur at the top of filter cap.
Lead Driver
Joined: Nov 2007
Posts: 5,139
Likes: 209
Yes I did an have driven it at least a mile and running better but still not right. tomorrow I plan to pull cap again and oil o'ring reinstall it and torque.
Is there a bypass in the fuel filter so if fuel ressure is low it is diverted past filter.
Still wondering why no fuel pressur at the top of filter cap.
Is there a bypass in the fuel filter so if fuel ressure is low it is diverted past filter.
Still wondering why no fuel pressur at the top of filter cap.
Posting Guru
Joined: Jan 2009
Posts: 1,321
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From: Mattawa Washington.
Sounds like you still have an air pocket in filter housing. It may take longer to get the air out if you have a mechanical gauge due to the air in the gauge line. Try cycling the key waiting 15 sec. between cycle. If your o-ring was bad I would think it would be leaking fuel. As the primary pump should supply more fuel than needed to run the motor.
Mountain Pass
Joined: Dec 2009
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Okay after having problems with the adapter to convert plug port to 1/8" IPT I decided to drill and tap top of fuel filter cap and attach 1/8" 90 ell. Completed it and installed electrical fuel pressure gauge. started engine and it runs like it has air in fuel and gauge shows zero fuel pressure. could I have an air leak in cap? Would that give me no fuel pressure at the top of fuel filter. I tested gauge with air and it is working.
Thread Starter
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Elder User
Joined: Mar 2005
Posts: 545
Likes: 0
From: Denison, Tx
Thanks guys I found the problem, when I pulled the GDS spring to shorten and do the tap on top of cap it I inadvertantly lost the brass poppett, found it and reinstalled and problem is corrected.
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Posting Guru
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From: Mattawa Washington.
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