Web27 feb. 2013 · The injector return rate test is the accurate way of checking injectors, and also is about the only way to check the CP3. To test the CP3 you have to have 8 good injectors with minimal return rates to them, then you check for return fuel fro mthe CP3 during a return rate test (should be less than 2 onces). Web19 aug. 2011 · The only manual test you can attempt it to remove every return line from the injectors and somehow attach a hose to each injector. Run the lines into 8 measuring …

Injector return rate info Chevy and GMC Duramax Diesel Forum

Web14 apr. 2014 · Return rates are a much more accurate test of injector health since 01-10 DURAMAX injectors are pressure differential valves. They open by opening the bypass port, and when there is a 1400-1500 PSI differential between the incoming fuel pressure and the pressure inside the injector, it will open. Web1. Cracked injector 2. Injector return lines are under the valve cover on LB7 engines. Pressurize the return circuit with the valve covers off and look for bubbles or vacuum … equity cx

Lb7 injector return flow - Competition Diesel

Web6 dec. 2024 · LB7 Duramax Return Flow Rate Testing. zmotorsports. 6.15K subscribers. Subscribe. 12K views 2 years ago. In this video I demonstrate how to test fuel injector return rates on an LB7 Duramax engine... Web2 jul. 2014 · Checking returns is simply a measurement activity. You'll need a graduated container to measure te returned fuel. I beleive (someone verify) that each injector should return about 3 ml during 15 seconds of cranking. Thats 12 ml per bank for you math majors. All you do is capture the fuel and measure it. Web14 mrt. 2008 · Yup seen that before. You need approximatly 1200psi fuel pressure while cranking to get the fuel injectors to spray fuel. If your return flow from the injectors is … equity czar