Injector Balance Test
#1
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.
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.
Thread
Thread Starter
Forum
Replies
Last Post
Chevy33
2nd Generation S-series (1995-2005) Tech
5
09-07-2011 08:07 PM
