2011 Ford 3.5 EcoBoost Waveform

Looking for a good fuel injector waveform for a 2011 3.5 EcoBoost. Thanks in advance.

Are you having a misfire on a cylinder? I don’t have any but could you grab current ramp and voltage from another cylinder??

Can't say I've ever checked one. :ohmy: I'll see if any roll through the shop tomorrow.

Any specific complaint?

I compared a good cylinder to a missing cylinder in regards to their fuel injector waveforms and did notice a difference. Can anyone help me in regards to understanding what it actually going on with the two waveforms? I understand what a normal fuel injector waveform looks like, but this has a high pressure fuel pump with injectors, so it is new to me. The good waveform is from cylinder #1 and the bad is from cylinder #3 (which is the one that is missing) Sorry about the pics being upside down (not sure why it uploads like that)

The pcm on these types of injectors controls both sides; it pulses the feed side (positive) as well as the ground side (negative). You may want to scope both wires...

The picture # 27 shows the working injector- when aligned correctly . In the beginning there is a voltage spike (slightly more than 60V) due to the capacitor's discharge .Remember that in direct injection systems the injection time is very short and the "boost" voltage of the capacitor helps to open the injector quickly. After the initial spike the injector opening now is controlled by pulses at system voltage.

The picture #31 shows the bad (?) injector. There is an irritating first spike to be seen without virtually any opening time. The second spike also does not reveal any injector opening happening. It looks as if this second voltage pulse may not find proper ground as the the descendent slope of the waveform suggests.There are no control pulses at the 12 V level to be seen.

It might be worth to have a comparing look at the ground side of both the good and the bad injector as well as putting a current clamp on. (If you could upload the images not inverted it would be Real help for the eyes 8=)