Bad Knock.

[wilderg88]

i just did a motor swap recently and ive been dattalogging and ive been having a couple of issues. i have a 1992 laser awd and i dropped a 6 bolt jdm motor. one of the problems is im getting tons of knock. any time i give it gas even a l little its starts knocking and goes all they way up to 43. ive already changed the knock sensor the old one was bad. i dint tighten it too much and its also not lose. this is part of my log>> rpm1700 / knock 18/ tps 0.7% /tima 21 /map 2.77 bar/ o2-F 2.50V/ injp 1.5ms/ now at >>> RPM 3031/ injp 6.2%/ knock 43/ TPS 3.5/ map 2.77/ tima 12/ O2-F 2.5v. im dattalogging with a palm using mmcd. i adjusted the TPS by following the guide on vfaqs. but it still seems a little off and i dont know what else to do. ill post more info as i remember and ill be looking at this thread often. im also running a ebay t3/t4 turbo with a Dnp manafold tial 44m Wastegate and im on 6 pounds of boost since thats my wastegate pressure and i dont wanna higher the boost till i get all my problems fixed. any ideas as to what my problems could be would help alot.

 

[doubleclutch99]

alot of stuff can cause knock counts to be high like that. ticking lifters, loose rattling exhaust, bad bearings in the water pump can even cause it , but that's usually something you can figure out by listening to it. just a few things to check.

 

[wilderg88]

thanks for the reply man. the motor dosent have any lifter ticking at least none that i can hear. the exhaust i will recheck and make sure everything is good. if anyone has any other thoughts or ideas of things i can check let me know. it also gets high knock when reving in neutral. as a matter of fact the log readings i posted where all in neutral.

k so im going to check the base timing of my car today see if that helps. also is there a way to adjust the tps on a 1g a different way than the way on vfaqs?



ohh and also my O2-F reads 2.50v on the datalogger is that right? my car also runs super rich when i give it gas. aem wideband reads 10.

 

[wilderg88]

so today i tried losening the knock sensor to the point where its almost not touching the block. and i free reved it a couple of times and my knock went away. then i tightened it just a little. and again started getting the knock when free reving and of course while driving. so i lossened it up again and took it for a drive. im currently on 5 pounds of boost on a ebay 50 trim. the car pulled really good and i only saw like 1 or 2 counts of knock and it wasant steady knock it just knocked and went away. so my question is. is it suppose to be loose like that? and is it suppose to knock when i tighten it just a little tiny bit. i dont have lifter tick btw.

 

[Indian]

It should be fully tightened against the block. If its loose and shaking it should see more knock.

 

[wilderg88]

i think im just ganna do what gofer suggested in a different post and put a plastic washer in between to eliminate some PK. its also a brand new knock sensor from autozone. i coulnt afford the oem atm and i thought the autozone one would be alot better that then one i had. it was completely worn out.

tried the plastic washer approach but still see the same knock. i just noticed that my IC pipe is right up on the alternator so i think that might be causing my knock issue. i don't have any lifter tick also.