Interpret power balance test pics

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Nov 14, 2016 | 09:41 PM

valutechpc

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From: Lincolnton, NC

Interpret power balance test pics

Can anyone interpret which injectors are no good according to the pics? They have all been replaced. some from ebay (never again) and some from advance auto parts. Number 5 and 8 are motorcraft injectors. Number 5 looks a little weak to me. Should I send it back as defective? Number 7 looks higher than the rest. I have done a releative compression test and cyl 3 was 1% and cyl 4 was 2%. the rest are 0%. 2003 6.0 excursion by the way. first pic is cold and the second is warm.

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Nov 14, 2016 | 11:37 PM

Nicmike

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From: Western AR

If I were you, I would post this in the 6.0 forums. You will get a quick response there.

Nov 15, 2016 | 12:45 AM

valutechpc

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From: Lincolnton, NC

Ok. Thanks for the suggestion. Mods, please delete this thread.

Nov 15, 2016 | 08:42 AM

william_04_x

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Joined: Nov 2007

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Did you perform this test because of a running issue, or just because you were curious as to their performance?

Your graphs don't look too bad at all. Is "smoothing" On or Off?

Dec 16, 2016 | 05:33 PM

valutechpc

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From: Lincolnton, NC

Just a follow up, I replaced injectors 2 and 4 because the graph was showing the grey line to be very wide. Bucking is gone now. I'm still going to replace 5 too because I got a contribution code for that again. I already replaced it 2 months ago with a motorcraft injector. Guess I got a bad one.