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2009 F150 5.4 3V
Completely rebuilt engine. New plugs, original coils.
Unable to perform balance test, keeps saying the ignition is turned off after I start cranking for the test?
Both long term fuel trim running slightly rich, more on bank 2 @ - 5%
Bank 1 knock sensor 100
bank 2 knock sensor 150
VCT error hovering around 0% on both banks
FlexFuel trim 16%
No difference in roughness @ idle in park or drive.
Can anyone help me interpret the power balance test ?
I'm thinking slight miss cylinder 7 and 2.
What are you trying to interpret? I don't see any image(s).
keeps saying the ignition is turned off after I start cranking for the test?
What are you using to try and run the PBT?
It sounds like your device is complaining that its power supply voltage is too low while cranking. Could be a low battery charge, a power feed or ground issue, or a testing device that's too sensitive to lower supply voltage.
Last edited by projectSHO89; Jul 25, 2022 at 07:37 AM.
What are you trying to interpret? I don't see any image(s).
What are you using to try and run the PBT?
It sounds like your device is complaining that its power supply voltage is too low while cranking. Could be a low battery charge, a power feed or ground issue, or a testing device that's too sensitive to lower supply voltage.
Thank you.
I'm using IDS with a VCMII clone. I 've noticed with age, the VCM craps out often. Also been having USB connectivity issues with it.
There should be two images with the power balance test results in the first post. They're showing up on both my mobile and desktop.
I also have forscan for pulling data. Just not sure what I should be looking for, everything looks as it should other than the awful power balance and slightly rich bank 2.
I've order 8x motorgraft Dg521 ignition coils and 2x new motorcraft upstream o2 sensors. The o2s aren't switching the way I'd expect and the coils and o2s are original so figured I'd start there.
The upper 2 lines are the bank 1 and 2 upstream o2s which are up to temp.
Hmmm. The lack of visible images is on my end. Looks like it's related to a VPN I'm using. Odd..
Can't read most of the Forscan screen photo. Between the glare and reflection on the screen and the clutter from too many parameters, just can't see what's being displayed.
Upstream O2 sensor voltages are definitely "wrong", though.
8 new coils and 2 new upstream O2s and the problem hasn't gone away. Rough idle, runs fine at higher RPM.
I think I might be pulling a valve cover on bank 2. When installing the phaser on that bank, I did not follow the procedure exactly as I should have.
I locked the phaser only and didn't clamp the camshaft with vice grips. I may have bent the pin slightly when torquing the bolt down. That's the only thing that I can think of.. The second power balance picture kinda supports the theory. 5,6,8 are all delayed. 7 is the only oddity. Maybe the VCT is able to kick in at higher RPMS to correct any irregularities and that's why I don't see/feel it then.
Not sure where or what else to look at to prove or disprove it. Any ideas?
Or maybe bad fuel ?
Its winter grade fuel that's been in the tank for 7 months.
