# Broken Fuel pressure test gauge **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [October 18, 2018, 10:31pm UTC](https://community.cartalk.com/t/broken-fuel-pressure-test-gauge/127061 "2018-10-18T22:31:25Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Yosemite](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/yosemite/32/643_2.png) [@Yosemite](https://community.cartalk.com/u/Yosemite)\ **Post date:** [October 18, 2018, 10:31pm UTC](https://community.cartalk.com/t/broken-fuel-pressure-test-gauge/127061/1 "2018-10-18T22:31:25Z")
Can anyone tell me if there is a difference between wet and dry pressure gauges. I tripped at my shop and dropped my fuel pressure test gauge. I was looking on-line for replacements…just the gauge…but they don’t list them for liquids, or air pressure etc… I’m under the impression that any gauge in the 0-100 range would be fine. Yosemite ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 18, 2018, 10:43pm UTC](https://community.cartalk.com/t/broken-fuel-pressure-test-gauge/127061/2 "2018-10-18T22:43:54Z")
As long as the gauge uses a bourdon tube and not a diaphragm to measure pressure, it can be used to measure the pressures of gases and liquids. Tester ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [October 18, 2018, 10:48pm UTC](https://community.cartalk.com/t/broken-fuel-pressure-test-gauge/127061/3 "2018-10-18T22:48:28Z")
If a gauge is properly connected and held above the source of pressure liquid shouldn’t enter the gauge. But what on your gauge is broken? The mechanical gauges are bourdon tube [https://www.google.com/search?q=bourdon+tube+gauge&client=firefox-b-1-ab&tbm=isch&tbo=u&source=univ&sa=X&ved=2ahUKEwiA3YzyiJHeAhVKA6wKHaySBkIQsAR6BAgCEAE&biw=1212&bih=779](https://www.google.com/search?q=bourdon+tube+gauge&client=firefox-b-1-ab&tbm=isch&tbo=u&source=univ&sa=X&ved=2ahUKEwiA3YzyiJHeAhVKA6wKHaySBkIQsAR6BAgCEAE&biw=1212&bih=779) and should take a beating without damage. ---
**Author:** ![Yosemite](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/yosemite/32/643_2.png) [@Yosemite](https://community.cartalk.com/u/Yosemite)\ **Post date:** [October 19, 2018, 1:23am UTC](https://community.cartalk.com/t/broken-fuel-pressure-test-gauge/127061/4 "2018-10-19T01:23:46Z")
I dropped it and when I inspected it, the needle read just above the max pressure…I think it is 100#. I thought that the needle just jumped over it’s stop post. I took the cover off and used my finger to rotate the needle clock wise enough and then slip it over it’s stop again. When I hooked to my truck…which should read about 40# …it only rose to about ten # and it took at least a minute to rise that far. Nothing leaked!!! Yosemite ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [October 19, 2018, 1:02pm UTC](https://community.cartalk.com/t/broken-fuel-pressure-test-gauge/127061/5 "2018-10-19T13:02:05Z")
Check your gauge with air pressure.And FWIW any gauge or sending unit can be tested with controlled air pressure. If your gauge measures 0 to 100psi connect it to 50psi and if the gauge indicates 50psi it’s working OK. ---
**Author:** ![Yosemite](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/yosemite/32/643_2.png) [@Yosemite](https://community.cartalk.com/u/Yosemite)\ **Post date:** [October 19, 2018, 4:45pm UTC](https://community.cartalk.com/t/broken-fuel-pressure-test-gauge/127061/6 "2018-10-19T16:45:57Z")
I will try using air pressure. Good idea @Rod_Knox !!! Yosemite