Any way to trick a knock sensor?
 

I just finished my b16a swap in my 89 hatch, and decided to take it for a quick cruise down the road to see if there were any issues before I start driving it steadily again. Sure enough, knock sensor code is popping up. The sensor is intact on the block, and my wiring harness has been converted over to run my pr3 obd0 ecu, so I'm guessing the sensor itself may be bad. The motor runs good, but hits about 5000rpm and just kinda dies off, so I'm guessing it also won't activate vtec because of this code. Is there any way to just trick the ecu into thinking the sensor's there and working? I really don't feel like digging around the back of the block to try and replace it :-\ And until I get a burner, I can't even chip the ecu and disable the knock sensor :P

Re: Any way to trick a knock sensor?
 

chip the ecu and disabel it only way

Re: Any way to trick a knock sensor?
 

Damn...that sucks. :( Guess I'll have to drive it mudbutt non-vtec style for a little while then :X

Re: Any way to trick a knock sensor?
 

Just unscrew it from the block and hook it up to the ecu in the cabin.

Re: Any way to trick a knock sensor?
 

how is that gonna help if the sensor is no good?

Re: Any way to trick a knock sensor?
 

black magic

Re: Any way to trick a knock sensor?
 

i think he is thinking that the code if for too much knock, LOL.

Re: Any way to trick a knock sensor?
 

I thought he was saying that the sensor it not hooked up at all.

Re: Any way to trick a knock sensor?
 

ah, as in not wired into the harness, gotcha now, still just as easy to wire it to the sensor while in the block rather than pull it from the block and wire it right next to the ecu.

Re: Any way to trick a knock sensor?
 

No, the sensor is wired in...it's at pin b19. And it's plugged into the sensor, and the sensor's still in the block. Everything's hooked up correctly, I think the sensor's just bad. :P

Re: Any way to trick a knock sensor?
 

The ECU needs to see some feedback from the KS to work.

You can get piezoelectric pickups from RadioSlack for $1.99/per... strapped the the fuel rail will produce ~.75 volts. You may find you need two in the rail, as normal baseline for Honduh KS seems to be spikes as high as 1.5 volts. Positive connection to KS, negative to ground (engine or sensor ground irrelevant).

I prefer chipping the ECU, personally.

Re: Any way to trick a knock sensor?
 

Hah...i'm a dumbass...fixed it this morning. The wire I ran to the ks got caught on the rear trans mount and it must of ripped it in half. Zip ties ftw this time :l

Re: Any way to trick a knock sensor?
 

awesome, hows she running now???

Re: Any way to trick a knock sensor?
 

Like a mudbutt slow stock b16a ;D It's still pretty fun to drive, but after going from a boosted LS to this, there's no comparison. Honestly, I think a decently done up n/a z6 would walk all over it. I'm still debating whether I want to throw on my new turbo and manifold, just for reliability factors. Plus I think the hairdryer's a little too large for what I want...no more than 6 psi on this motor just to be safe...but there again, reliability and drivability :-\

Re: Any way to trick a knock sensor?
 

i have always said the B16s are overated stock, but alot better starting point than a D just because of head flow capability. good luck.

Re: Any way to trick a knock sensor?
 

Everyone knows a stock b16 is far from impressive. A well set up all motor d will walk a stock b16a. Done it with alot of my sohc builds


Now a b16a on 10 psi thats another story

Re: Any way to trick a knock sensor?
 

A"built" b16a on 10psi ;D I don't think I'd trust this b16a stock on my mongo t3/to4e .70 at 10 psi :l

Re: Any way to trick a knock sensor?
 

Get a thicker headgasket and get the compression down to 9.1. Makes the tuning alot more friendly

Re: Any way to trick a knock sensor?
 

Run richer than HT tells you to, drop 3-4 degrees off the timing you find MBT at, and be a man.

Re: Any way to trick a knock sensor?
 

h-t style of all motor tuning 14.1 at wot ya thats where its at

Re: Any way to trick a knock sensor?
 

Lol...I don't even mess around with HT anymore. I'll be using this bin as a base for tuning...http://forum.pgmfi.org/viewtopic.php?t=6711&highlight=...and having it tweaked around to suit my setup at a local shop with a dyno. I think max I'll run is 6psi though, maybe 8 if I feel daring, and shoot for a nice 10.5-11:1 afr just to be on the safe and conservative side.