knock knock knock Options

[ncgalant]

Hey guys, I've been playing the the laser just trying to get a better understanding of what the ecu is doing at what point and why. Problem is she knocks and I can't get it to go away. Here's what's going on:

-Into the throttle anywhere from 1500-2700rpms results in 43counts of knock
-The O2 cycles as it should and my fuel trims are all 3 90-110
-Changing gears to raise the RPMs will make the problem go away
-A hard rev will make the problem go away for a minute or two
-At WOT I never see a knock count higher than 2

So what are your thoughts? I'm leaning toward fantom knock.

[ncgalant]

My VR4 was doing this and new injectors seems to have fixed it.  Any thoughts on an injector getting stuck open?

A stuck injector certainly could produce these symptoms. Too much fuel at low RPM causing misfire and all kinds of problems, and just the right amount at higher RPMs smoothing everything out. You could use a stethescope to listen and hear if the injectors are all clicking the same.

At this point and even before I posted anything I was thinking it was either a spark or fuel issue. Neither of these issues would be causing detonation persay. A leaky injector and a bad spark would both cause the symptoms of rich knock. Currently that is the assumption I am working under. Thanks for the ideas guys. I'll be replacing my 2/3 coil next. If that is not the problem I'm leaning toward the injectors. I'm planning to replace all parts that would cause my symptoms one at a time so I can determine what the exact problem is.