Overtight Knock Sensors

[The Dan]

I may have a new lead on my power loss problem. I don't know how many of you remember my posts about the AFM. Well turns out that there is no difference after all. I have recently learned that I may have overtightened my knock sensors causing the crystal to stretch, creating a false knock signal constantly, causing the timing to be constantly retarded on accelleration.

I was just wondering if anyone here may have experienced a similar problem?

I'm gonna wait until the morning when she's cooled down and torque them properly. I'll let you all know how it goes.

[predator]

It's an interesting one...Seems quite possible actually. Lots of people try the "usual" stuff of AFM, coils, plugs, etc and still have some problems.

Let us know the results.

[666DAN]

It is possible, I've found ANY malfunction with the sensor will result in excessive timing being pulled. I'm suprised the SAFCII doesn't cause the same thing, as a few other products on the market that are wired into the factory knock sensor cause it to go into fault. A good example is the GReddy Knock Sensor adapter...on most cars it reduces the knock signal...on my R34 it retards the timing badly.

[Duncan]

have you got access to a PFC? it should give you knock readings, you can see if the sensor is OTT.

[The Dan]

I have got a 2004 model OTC Scanpro at my fingertips.

I would have thought also that a constant engine knock would cause some type of error code. None so far.

When I disconnect the knock sensor plug, it has full power inversely. Meaning that usually it dies in the arse between about 3500 to 6000. When I disconnect the plug it nearly snaps your neck in half as soon as it reaches 3800 on the dot every gear, every time. That's why I'm kinda leaning towards knock sensors. I have fully tested and replaced everything else. I know it is a timing problem, I can feel it. Getting full boost, full fuel, full spark....just no power. I gotta go out to work tomorrow and get a deep drive socket so I can crack 'em. So unfortunately results won't be posted until tomorrow arvo probably.

[The Dan]

Not the knock sensors.

Plus to top it all off I blew the turbo on the way home....brand new rebuild turbo.

I'm selling the car now. I haven't got the money to throw in an aftermarket computer and fix the turbo if they won't do it under warranty.