Testing Injector Pulse

JSpecV03 · 2008-09-30 09:58:00

i have a clogged injector and i want to check the injector pulse. how do i do this and what tool(s) will i need to do it.
thanks for the help guys.

specVnismo2004 · 2008-09-30 10:58:55

you could pull out the injectors and turn the motor over. kinda messy, but you will be able to see it. if you wanna do it the correct way, hook up a fuel pressure gauge (in line), unplug all but one injector, prime the fuel system, unplug the fuel pump fuse, turn motor over (same amount of time every time), and measure how much the pressure drops. plug the fuse back in and repeat. the one that drops the least is going to be clogged.

JSpecV03 · 2008-10-01 02:45:03

cool thanks for the help. whats the normal operating psi? after i prime it, pull the fuse and try turning it over, what should needle spike at and what can i expect it to drop to?
thanks for your help dude.

Last edited by JSpecV03 (2008-10-01 02:45:35)

specVnismo2004 · 2008-10-01 07:24:25

idling psi should be around 51psi, so around there, maybe lower. but what your really looking for is how much it drops per cylinder, and the difference between them.

JSpecV03 · 2008-10-01 22:58:20

ok cool. i ran 2 bottles of feul injector cleaner through and still boggin out at around 4-5k rpm
maybe time for some new injectors?

Last edited by JSpecV03 (2008-10-01 22:58:53)

specVnismo2004 · 2008-10-02 01:03:38

could also be an ignition issue. check your plugs.

JSpecV03 · 2008-10-04 00:59:02

i pulled the injectors out and swapped the 1 from cycl 1 to cycl 2 and vice versa. no change it keeps coming back to cycl 1. i swappped plugs and coils with 1 and 2 and its still throwing cycl 1 into miss. im now leaning towards ignition voltage or resistance or some kinda internal problem(crosses fingers)

im also not throwing any codes for the MAF

Last edited by JSpecV03 (2008-10-04 00:59:40)

specVnismo2004 · 2008-10-04 14:58:03

question... did you relocate the knock sensor yet?

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Testing Injector Pulse

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