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Hi
I have a jeep grand cherokee with a 3.0 diesel I replaced injector 4 and 5 with new ones and remove and clean the other ones. I put all injectors back in
I program the 2 new injectors with my scan tool. I put all the other back where they came out from. Now it will not start. It was running good before I took them out. 2 of them where leaking pretty bad when I did the leak test. That the reason I replaced them.
I hooked up the scanner when it was turning over
from I can see I'm not getting enough fuel pressure at the fuel rails. I'm not sure what to test for. Do I need the bleed the hight pressure pump.
I disconnected the high pressure fuel line and crank it over and fuel did come out of it but definitely at high pressure. I disconnected a fuel line from a injector and not much fuel came out of it.
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Last edit: 1 year 9 months ago by Grand. Reason: Forgot a few things
Hello
For me, it looks like a typical airlock in the fuel system.
2 ways to do it
1. Try to cycle ignition 3-5 times and wait 20-30 sec between cycles to provide time for lift pump (low-pressure pump) to push air from the fuel rails
2. If you have a bi-directional scanner, you can command a lift pump on\off and at the same time lose a fuel line on each injector and bleed air one by one.