knock on tools

[sun dog]

I'm not sure whether or not the car will run with the esc unplugged.  
Let us know. You may set some codes doing so, but they'll clear  
if you unplug the orange wire from the battery for 10 seconds or more.

 
  
Screwed around with the ESC and Knock sensor today.  I'm not familiar with the scanmaster and what info it gives you.  I use a Pro Link scan tool and get a about 30 or so parameters.  
  
With nothing unplugged I get knock counts.  No deg retard.  
With the knock sensor unplugged I get no knock signal counts. No deg retard.  
With the ESC unplugged, it will start and run fine but I get instant 2 to 9 deg of retard, and knock signal counts.  I also got trouble code 43 ESC failure    
With the ESC and Knock unplugged I get 2 to 9 deg retard and knock counts, even though the sensor is unplugged.  I guess the computer is making up signals?  
  
Phil, are you getting knock counts and knock deg retard on the scanmaster reading?  
The knock counter is an advancing number until it hits 255 then it resets to zero, so it will stay at the last number it was at until it advances enough to reset.  Maybe you were seeing a higher reading on the other scanner because it advanced.  
  
As far as the integrator and block learn numbers higher than 128 are adding fuel and lower are subtracting.  It might be low fuel pressure, exhaust leaks, or injector problems.  Is the O2 moving up and down in voltage and are you getting crossovers?  Are you in closed loop?  Are you getting a coolant temp reading?  When your BL goes up is the integrator at 128?

It's always more fun to figure out someone elses car problems than your own.




    
  
 :smt071  :psix;

[87natty]

:prayer:  To your research!

[ledzeppac]

hmmmm  when the ESC is disconnected are you getting knock when in boost or just normal driving?

[Be4u]

WATCH OUT!!!!! Phil is on to something!!!

[sun dog]

hmmmm  when the ESC is disconnected are you getting knock when in boost or just normal driving?

 
I was in park for all of this.  I wanted to see what the computer would do with the ESC failure(unplugged).  From what I saw I was getting between 2-9 deg retard just idling and revving up.  Before I unplugged it I got no retarding, so I guess the computer bumped it up like in limp home mode to protect it self.
 
Is the 4.5.6.7 (deg retarding?) you were talking about only under boost, was it knocking at the same time it retarded?  Can you hear the engine knock and see knock counts go up?  You need a scanner with a flight recorder, or get someone to stare at it while you are driving and it happens.
 
We need a new list of what it's doing, I forgot what the original problem was now.  Did you upgrade your injectors and fuel pump when you put the bigger turbo on?

[Recklessrob]

I'm with Natty, Nice research. :prayer:

As for knock with these cars. If its bad enough so you can hear it,
theres been some damage. The knock sensor is way more sesative.

[ledzeppac]

So it is even worth trying a new knock sensor and ESC module?

[sun dog]

So it is even worth trying a new knock sensor and ESC module?

 
  
I would say No.  I think I would just unplug the ESC while it's idling just to rule it out, and if it makes any difference in numbers it was probably working OK.  I wouldn't recommend driving it with the module disconnected.  So the only major complaint is the knock retard under boost, Or is it affecting drivability?  How's the oil pressure? are you sure the sensor isn't picking up excessive rod bearing wear.

[ledzeppac]

oil pressure is great... perfect

15 or so idle and 40-50 cruise