Checking for leaking fuel injector.
#1
Teching In
Thread Starter
iTrader: (1)
Join Date: Dec 2013
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Checking for leaking fuel injector.
What is the best way to test to physically see if an injector is leaking? This is on a 2008 Silverado w/ 5.3 AFM motor.
My thought was to loosen the wiring harness running on the top of the engine to be able to remove the fuel rail assembly as a whole. Then turn the truck on with Key On/Engine Off and prime the pump and check to see if the injector is leaking. I was going to put some shop towels under them see if any fuel drips. Then replace the o-rings when I reassemble.
Can I disconnect the electrical connections from the injector and still prime the pump? Fuel will still be forced to the fuel rail/injectors, correct?
I've tested fuel pressure and I get a pressure drop of more than what the books says so I want to physically see if they are leaking. At least it will rule out one other possibility.
My thought was to loosen the wiring harness running on the top of the engine to be able to remove the fuel rail assembly as a whole. Then turn the truck on with Key On/Engine Off and prime the pump and check to see if the injector is leaking. I was going to put some shop towels under them see if any fuel drips. Then replace the o-rings when I reassemble.
Can I disconnect the electrical connections from the injector and still prime the pump? Fuel will still be forced to the fuel rail/injectors, correct?
I've tested fuel pressure and I get a pressure drop of more than what the books says so I want to physically see if they are leaking. At least it will rule out one other possibility.
#3
Unplugging the injectors and priming the pump will work as a diy solution. However, the proper way is to use a bi directional scan tool to activate one injector at a time and recording the pressure drop. Can be done on truck without Unplugging or removing anything.
#4
Thread
Thread Starter
Forum
Replies
Last Post
pdog
Tuning, Diagnostics, Electronics, and Wiring
4
03-10-2016 07:14 PM