So much knock! I believe it's phatom.

[slikvik]

I logged my car earlier today to find that I still have a knock problem. I have been dealing with this for quite some time. I believe it is phantom knock. It happens randomly and will shoot up to 43 counts (max). Can someone confirm my suspicions.

Picture of the log.

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By the way, I have no boost leaks, I already checked.
Base timing at 5degrees.
3rd gen lifters
I can't hear any big noises coming from engine area.
New knock sensor
Stock fuel system
Stock boost
FMIC
Small 16g

 

[crashman1972]

You check your exhaust and make sure it wasn't hitting anywhere or anything else against the motor? Do you have solid motor mounts? I get knock in between gears but it is the motor shifting on the solid mounts. It seams awful hi on yours though I would check exhaust system check for stuff banging motor and make sure the mounts are all tight.

 

[92AWDHX40]

Check the wiring, my culprit was in that, 43 i wold say thats not real knock.

 

[slikvik]

crashman1972, yes I do have solid motor mounts. It does buck when I shift gears sometimes.

I'm on stock exhaust and it does not seem to be hitting.

iugrad92turbo, where exactly was your wiring faulty? I will give that a check as well.

 

[Thomas91169]

S16g, FMIC and no fuel system mods? What sort of boost are you trying to run?

 

[slikvik]

I have a aeromotive fpr and wally 255, but I haven't installed them yet. I am at stock boost. I want to fix my knock issue before putting anything else on my car.

I may have found some faulty wiring, thanks to iugrad92turbo. I will solder in some new wire tommorow and hope for the best. I will update this thread as I go on.

 

[slikvik]

Finally figured it out! The knock sensor was mounted in the wrong location behind the block. Phantom knock is gone.

 

[GsxEcutioner]

Where else can you mount it?

 

[SHaman]

Interested to know where the knock sensor was

 

[Jerkychew]

ditto... where was that thing?

 

[slikvik]

Here's the picture.

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[GsxEcutioner]

hmm, i better go check where I put mine then .

 

[slikvik]

I also found some boost leaks in my fmic piping and lower injector seals. I have seen no more knock after fixing the knock sensor location and boost leaks.

 

[red1993gsallmt]

Here's the picture.

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Thanks alot for this pic and thread. I was having a knock issue that was driving me crazy and no matter what I did I would get the same 6-8 counts of knock from 4k-7k but my plugs showed no sign of detonation. Last night I saw this thread and ran out to my shop to find my knock sensor in that same spot at the top of the block so I moved it to the correct location and the knock is gone