Fuel Pressure Gauge

240Z through 300ZX Z31
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Randalla
Posts: 930
Joined: Fri May 24, 2019 8:58 am
Location: North Scottsdale

Fuel Pressure Gauge

Post by Randalla »

I have an aluminum fuel rail that Lucas built for my 240Z, with a screw in fuel pressure gauge, that reads 0-15 lbs. For quite a while it read accurately, usually 3-4 lbs. Later, I began noticing the needle fluttering all over the place when the car was running. Saturday, at a car show, one of our newer members, Rob1972 (Robin), noticed with the engine off, the needle was stuck at about 3 lbs. After a bit of research I learned that a fluid filled gauge (which mine wasn't) had a number of advantages over what I had. Primarily, the fluid (usually glycerin) damps out vibration, making the reading more accurate, while adding to the life of the gauge. I have a new one on the way (around $25). The old one is below.
Attachments
IMG_6811.JPG
1967 1/2 Roadster- 1600 4 cyl.
1972 240Z- 280 I-6
1976 710 Wagon- L20B 4 cyl.
1977 620 King Cab - L18 4 cyl.
2003 350Z Track- VQ V-6
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L320-Dale
Posts: 340
Joined: Thu May 23, 2019 6:25 pm
Location: North Gilbert

Re: Fuel Pressure Gauge

Post by L320-Dale »

That's good. I bet the fluid filled gauge will be much better.
Dale - Gilbert, Az
1965 L320 - Bamboo Tan / 1972 1200 - Sun-light Blue / 1970 240Z - Silver
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Randalla
Posts: 930
Joined: Fri May 24, 2019 8:58 am
Location: North Scottsdale

Re: Fuel Pressure Gauge

Post by Randalla »

The new gauge showed up, and unfortunately it did not work so back it goes. I ordered two others, which will be here tomorrow.
1967 1/2 Roadster- 1600 4 cyl.
1972 240Z- 280 I-6
1976 710 Wagon- L20B 4 cyl.
1977 620 King Cab - L18 4 cyl.
2003 350Z Track- VQ V-6
User avatar
Randalla
Posts: 930
Joined: Fri May 24, 2019 8:58 am
Location: North Scottsdale

Re: Fuel Pressure Gauge

Post by Randalla »

The 2 gauges arrived this afternoon, one fluid filled, and one not. Tried them both out and they both work. The fluid filled one registers almost steady at 3 1/2 lbs., fluctuating 1/2 lb. at most. The other one bounces all over the place, fluctuating as much as 2 lbs., due to engine vibration. In my opinion, the fluid filled one is definitely worth the difference in price ($8.00 vs. $17.00). Both were bought off Amazon. Each gauge registers from 0-15 lbs. The gauge on the right is the fluid filled one.
Attachments
IMG_6817.JPG
1967 1/2 Roadster- 1600 4 cyl.
1972 240Z- 280 I-6
1976 710 Wagon- L20B 4 cyl.
1977 620 King Cab - L18 4 cyl.
2003 350Z Track- VQ V-6
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