After chaning my oil this morning I fired up the car for a drive.

As I left my driveway I looked at the Commander and it was reading 80 on the knock without boost.

That black bar increases when I rev up the engine in neutral to about 4k RPMs.

So I decide to gingerly drive the car and cruise on the freeway.

During this time I would slightly boost the car and knock would drop down a little.

Where should I start on this?

I just don't get it.

 

short in the wire.... oil on the connector?

 

never did it before? My car will have a higher knock value until it gets warmed up, then its smooth as butter.

Tim

 

It has, but ranges from 10 - 20, not 80 with partial boost.

I did spill some oil as I was filling it up (darn strut bar's fault). Perhaps that might have something to do with the knock readings going cuckoo.

 

have you recently filled up the tank? Bad gas...just ideas.

Tim

 

I don't know if this will help, but I was talking to Rick the other day about the knock readings, and said once a customer's car was doing that, and they eventually traced it down to a bad air pump! Once they disconnected the pump, knock readings were totally normal again...

Worth a shot, I suppose...I could see how a bad pump (of any sort really) could replicate knock sounds in the engine bay...

 

nope, I've already factored that out since I have been driving on this tank for a week already without any problems.

 

My airpump does have alot of miles............ 250k~

 

Mine has 60K miles on it. Want to buy it?

 

Well before you go and buy a new airpump, try disconnecting it electrically first (should be a simple connector) and see if the knock goes away.

 

is the sensor torqued in to spec, although that damn thing is a bitch to get to with that oil line in the way.

Tim