Suzuki low power[FIXED]

Pulled this off a Suzuki APV wasted spark plug wire. Vehicle has low power complaint. Input is welcomed.

Well, just looking at what you posted, I noticed two things:

1) Hash in the spark line
2) High ending spark line voltage

1. Could be caused by in-cylinder turbulence or bad plug wires, bad plugs, a bad valve, an EGR leak to name a few causes

2. Most likely caused by a lean condition, but I don't know if you were decelerating when that was occurring. If you are lean, check fuel pressure at idle and at WOT and verify again spec. If that is good, I suggest an injector balance test.

I tend to look at spark lines while the car is stationary, snap the throttle, and then review the capture buffer. I like this technique since I can reproduce the same conditions over and over to see if I can find a pattern. I also try to look at each plug independently and then compare them to each other; although I wish I could view them is parade mode. But if this works for you, great.

Any trouble codes? Any misfire information you can retrieve/view? If you had misfire information, this might help you narrow your overall scope of work, but I'm not saying that misfire information is always exactly accurate. I learned that the hard way even though I should have listened to ScannerDanner since he said this numerous times. Have all of your readiness monitors completed successfully? How does mode 6 look?

This was taken WOT driving. I have no scan data (tool couldn't read).

Like GeekDIYMechanic said, I'm seeing a lot of hash in the spark line at times. Kinda reminds me of what I see on failed Ford COP's:



I think some spark strength tests at the coils themselves are warranted.

Have you had a chance to verify the low power complaint? Any noticeable misfire?

It struggles on flat and stalls on hills. At idle it's good but break stalling and road test, "It won't get out its own way."

I think it is safe to say exhaust back pressure also is to be measured.

I would second an exhaust back pressure test, if not hit on that that go after fuel pressure. Whatever it is from your description it would seem something that effects multiple cylinders.
I think the hash on the ignition is turbulence modern multi-valve engines have a lot of swirl in the combustion chamber.

Caritech wrote: It struggles on flat and stalls on hills. At idle it's good but break stalling and road test, "It won't get out its own way."

Gotcha. Here's a third vote for back pressure. If you had scan data, I'd suggest the good ol' WOT O2 test. You're no the only one to have problems with scan data on a Suzuki, for the record.

Sorry guys for late update. It turned out to be a damaged crank ans crank pulley.

Thanks for getting back to us with the fix!