i dont know what this is but in all gears at different rpms and not consistently it bogs like hell i changed the knock module but with both im getting up to 15 degrees knock retard what else would cause this

oh yea its only under 3/4 to full throttle

if i can figure out dataqmaster i will post a log

 

First try disconnecting the knock sensor and see if the bogging problem goes away. Then test the sensor to see if it's functioning properly.

 

so just drive with no knock module at all???

 

Yes with it disconnected.

 

so where are the sensors i need to diconnect

 

Thank Rob(shoebox) for the pics.

Look here
http://shbox.com/1/ks.jpg

What scanner are you using that told you there is 15deg of knock retard?

 

Would a LT4 KM solve that also? I am having the same thing.

-Dustin-

 

Don't believe it will fix the problem. Suggest you locate the source of the problem. Changing components to "mask" the problem will only give you temporary relief. The long term implications could be bad.

Since the sensor is built around a piezo crystal, defects can occur in both directions. That is they can become less sensitive (if you want to look at it that way) and more sensitive.

Don't forget there are other sources of knock as well. Bad bearings in components, loose items such as shields or loose connections such as engine mounts.

One thing you can do is put KOEO and check the knock signal. Then wrap on the engine with the back of a screw driver and check the knock signal. Now start the engine and watch the knock signal. Then try listening for the source of the knock with screwdriver stethoscope as I call it. You could also remove some accessories by say for example removing the belt that drives the accessory.

One other item of interest. If the rectifier in the alternator is going bad and leaking AC on the DC supply cable. It can DRASTICALLY effect the PCM. If there is as little as 0.03 VAC on the DC supply cable, the PCM can and will go nuts. To measure if that could be the problem, put your DVM on AC Volts lowest scale. Measure from a clean ground to the charging post on the alternator. Be sure the AC component is not over .03VAC.