I'm getting ready to do the ks bypass to see if that cures my horrible performance, quick questions:

If I go into RadioShak or similar electronics store, and ask for a 500k resistor, will they know what I am talking about?

For the install, all I have to do is basically push the ends of the resistor into the two little pin things on the connector that is closest to the topside of the engine/ecu (not the side of the connector that goes into the ks) so that I bypass the sensor? Then do I just leave the connectors hanging there and go for a drive? Will my check engine light come on?

I have 91 octane in there and realize that I must be careful to not put cheap gas in or else it might blow up.

My only other question is this: If my ks is bad, which I tested the resistance and there was NONE, so I am assuming it is doing nothing, then how could it tell my ecu to retard the ignition timing if it essentially has no power. If it's 100% busted/no power, wouldn't that be the same thing as having a 500k resistor positioned in a bad ks? It seems like having a dead ks and bypassing the ks is the same thing. Any input? thanks in advance.

 

If the ks is bad, the ecu probably defaults to a retarded ign map to prevent you from pinging the motor into oblivion.

 

that makes sense...so my ecu is probably running in a "safe mode" of somesort. so by bypassing it with the resistor, the ecu's signal to the dead ks will be stopped by the resistor, which then sends the signal back to the ecu, tricking it into thinking the ks is A-ok.....is that about right? only drawback is I have to put a warning label of some sort on the gas tank that reads "MUST USE PREMIUM..OR THIS CAR WILL BLOW UP" ha ha thanks for the info

 

[QUOTE=
My only other question is this: If my ks is bad, which I tested the resistance and there was NONE, so I am assuming it is doing nothing, then how could it tell my ecu to retard the ignition timing if it essentially has no power. If it's 100% busted/no power, wouldn't that be the same thing as having a 500k resistor positioned in a bad ks? It seems like having a dead ks and bypassing the ks is the same thing. Any input? thanks in advance.[/QUOTE]

None, as in zero ohms, or none as no reading which is infinite?? Either way it is shorted or open and 500 ohms is neither of those.

 

That one RadioS I went once in, could not sell, theys say: have to order. Dunno.

U may get real connector pins which slide in, solder resistor with wires. I just pushed it in... taped close. No check light.

Computers play with signal levels. Resistors either pull the signal level up or down, depending connections, anyway they steady signals to certain point. Cutoff means floating signal level: that (no R) 'signal' must be smtg like ping. The whole madness in all this is, that this KS signal up -or- down signal is 0,5V. This kind of voltage difference is easily lost in one oxidized connector; one meter of wire can cause this. Have fun.

I suppose the resistor can be almost whatever from 1k to 500k: what is needed, is that the signal processor accepts produced level as ok signal. The piezo element works as a microphone.. A piezo has no resistance, but as u bend it, resistance rises: this can be mimicked with a resistor. I suppose the engine ping produces gaps (no R) in this steady signal, and those are detected. Now dead KS represents that (no R) gap all the time...

I think (nevers seen, have none) if u open the KS, there is a possibility to retension it. And that tension gets lazy during ages...

Btw. This is just thin king based on previous experiences, not actual knowledge, so it may be totAlly wronG. But I'll not admit that

 

called Radio shack and they have a 470k resistor, but no 500k. Is this close enough? I tried searching online but I'm into the land of silicon valley and they use all sorts of confusing technobabble lingo. Wiking, since you are obviously a bit of an electrical guru, any idea online where I could get one? thanks for all your help by the way.

 

As said already... "I suppose the resistor can be almost whatever from 1k to 500k: what is needed, is that the signal processor accepts produced level as ok signal." ...suppose this fits between 1-500k.

Go get that 470 10cent from radioshack. Or two 1MegaOhm resistors and tie them as a pair to get 0.5M=500k...

Me dont exactly like the word guru... as there are so many fields in electronics and human is always limited. Used to be troubleshooting digital tech as a pro. Of course this problematic is just that at its best Well, I know i can fill a hallway full of electronics acrid smoke in a sec' - as it escapes from the processors. But getting the smoke back into the processor to keep that smoke running inside intel - has been kinda elusive task for me. And I suppose thats required from being named the 'guru'? Swapping modules, no problem.

 

470k works fine

 

thanks to all, I'll go give it a go and let everyone know the results...

 

470k works great I've had it for months and noticed immediate gains. You are 100% correct about where to install it etc... For a buck its a damn fine deal.

 

Has anyone tried to mount the knock sensor in a more accessible location instead of removing the intake manifold to get to the stock location?

 

Yes, smone here has tried that for VE. Dont remember who, and at least I have received no info how it was...

1. U need a oscilloscope; build test settings to get the pulse, picture of the pulse.
2. Understanding of ECU input circuit: how does it define ping.
3. Fashion the new KS thing via spying the current structure. Pls ! use the 50cent piezo...
4. Try to get similar pulse in similar circumstances.
5. Go at it.
6. Make money selling the 500$ setup (current price with installation?) with 100$. U pay 5$ for each set u sell...

Note: this is not at all impossible.