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-   -   Injector Balance Test (https://blazerforum.com/forum/engine-transmission-35/injector-balance-test-100115/)

423CV23 08-17-2019 03:56 PM

Injector Balance Test
 
I finally got around to doing the injector balance test on my '99 Blazer. Took a little while to get the Tech 2 32mb card/software (originally bought the Tech 2 for my '04 Saab Aero).
The initial pressure was at 60psi, but when the pump shut off, it dropped a few psi; assuming the lower number is the correct one to record.
I let it sit for 30-45sec before pulsing the injector to see if there was any pressure drop. I'm assuming a leaking injector would show a pressure drop pretty quickly.

Cyl
1 58psi 42psi
2 58psi 42psi
3 58psi 43psi
4 58psi 42psi
5 58psi 42psi
6 58psi 42psi

Not sure how these numbers compare to the engineered specs. Are these close, or right on??

I also performed the cylinder power balance test which showed no misfires after 10-15min of idling, and for the heck of it tested the IAC, which seemed to work as it should when increasing/decreasing by 25rpm.


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