Zed Head Posted October 21, 2013 Share #13 Posted October 21, 2013 The key concept of the EFI system is fuel pressure. The gauge seems expensive but the $40 will probably save you hundreds in parts and whatever your time is worth. If you don't want to buy one, see if a shop will measure it for a small fee, or if you can borrow one. There's no need to "cut in" a fitting for a gauge. The gauges come with a T fitting with the gauge port, a piece of hose and some hose clamps. All you have to do is pull the hose between the fuel rail and the filter and insert the T fitting. If you replaced the filter, you've already had the hose off once.Avoiding the fuel pressure measurement might be the most common (non)action of people new to working on EFI. Fuel squirts from the hose, gas flows, the pump makes noise - none of these tell that fuel pressure is right. If it's not right, the EFI can not work as intended. Link to comment https://www.classiczcars.com/topic/47749-77-280-z-22-wont-drive/?page=2#findComment-434197 Share on other sites More sharing options...
Andy@hardy Posted October 21, 2013 Author Share #14 Posted October 21, 2013 I purchased a pressure gauge and after work will be cutting in. I plan on leaving it in engine bay. Is this a bad idea,or ok. What pressure will I b looking for? Link to comment https://www.classiczcars.com/topic/47749-77-280-z-22-wont-drive/?page=2#findComment-434200 Share on other sites More sharing options...
SteveJ Posted October 22, 2013 Share #15 Posted October 22, 2013 Page EF-16, Section 12: 36 PSI Link to comment https://www.classiczcars.com/topic/47749-77-280-z-22-wont-drive/?page=2#findComment-434208 Share on other sites More sharing options...
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