IGV Posted December 23, 2021 Share Posted December 23, 2021 Hi everyone I'm new to this site, I recently bought a 2005 mack cv713 427 AI, and I'm was wondering if someone could help me on how or where I can connect the fuel pressure gauge so I can check it, your help would be greatly appreciated, thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/68970-fuel-pressure/ Share on other sites More sharing options...
Joey Mack Posted December 23, 2021 Share Posted December 23, 2021 (edited) a couple places.. I hook into the return port on the right side of the block, however another 'Poster' here suggests the port behind the top of the overboard breather. it is on the right front corner of the engine and has 15/16" hex nut made into the lid. remove the lid and you can get to the small plug in the fuel gallery.. you will need to use 3" long male pipe union to reach out enough to hook a gauge to.. 60+ PSI....Jojo Edited December 23, 2021 by Joey Mack More content needed Quote Link to comment https://www.bigmacktrucks.com/topic/68970-fuel-pressure/#findComment-485806 Share on other sites More sharing options...
IGV Posted December 23, 2021 Author Share Posted December 23, 2021 Joey Mack Thank you very much for the info, if I check the pressure thru the return line I just disconnect the hose and attach the fitting on? Do you have any specific fitting size or set up that I can use, and you the fuel at idle? Thanks for your time and response. Quote Link to comment https://www.bigmacktrucks.com/topic/68970-fuel-pressure/#findComment-485813 Share on other sites More sharing options...
Joey Mack Posted December 23, 2021 Share Posted December 23, 2021 if you have the pressure sensor on the regulator, take the sensor out, linstall a 't' then put the sensor back in the 't' and hook a gauge to the open port.. 1/4" NPT.. I have one made up with a long hose, so I can put it in the window and hang it on the sun visor so I can drive the truck and test it.. welcome aboard... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68970-fuel-pressure/#findComment-485814 Share on other sites More sharing options...
IGV Posted December 23, 2021 Author Share Posted December 23, 2021 Thank you very much, that's all I needed to know on how to check the fuel pressure, have a nice day and Happy Holidays. Quote Link to comment https://www.bigmacktrucks.com/topic/68970-fuel-pressure/#findComment-485817 Share on other sites More sharing options...
Joey Mack Posted December 23, 2021 Share Posted December 23, 2021 Merry HaunaKwanzaMas.... Jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68970-fuel-pressure/#findComment-485818 Share on other sites More sharing options...
IGV Posted December 23, 2021 Author Share Posted December 23, 2021 🎅 Quote Link to comment https://www.bigmacktrucks.com/topic/68970-fuel-pressure/#findComment-485819 Share on other sites More sharing options...
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