Can't figure this out??

[2GNS4ME]

I been having a problem with knock for the longest time..up to 12 degrees...02 reads 850. I had red stripes so I put the stock injectors ..still no help...then I put in a brand new walbro 340....still same results...Running only 14lbs of boost. When I spray the alchohol the knock goes down to about 7-8 knocks.. Any ideas.


Joe

 

[Lee_Burough]

There may be some ideas here:

http://www.zhome.com/ZCMnL/PICS/detonation/detonation.html

 

[turbosam6]

Any scan tool #'s, like maf? Could be a maf sensor going bad, or false knock.

 

[JDEstill]

Here's a good list of items to check:
http://www.geocities.com/rad87gn/tech/knocklist.html

John

 

[2GNS4ME]

Thanks guys for the links.

Ya I did change the MAF sensor and I do have a scanmaster. Going to try a couple of things this weekend. Thanks for your help... I dont think its false knock cause it goes down a little when you turn on the alky injection.