Found this mod on TeamZX2(which is down at this time ). By unplugging your knock sensor you will get a smooth power band with much more pulling power. It is just above your oil filter to the left and has a green plug on it. The release tab is on the bottom of the plug. Just press up on it while pulling the wire. I have done this and no longer have the power surge above 3000 rpm. It has the power from start all the way to max RPM. You might have to run 89 octane fuel, I did. YOU WILL NOT GET A CEL LIGHT.
Iām also here from the teamZX2 site & recently disconnected the knock sensor.
The tab on my '02 was on the top & popped off easily after I figured that out.
The power increase is noticeable & may be giving a little better mpg around town. I run BP regular & notice slight pinging only when lightly accelerating uphill in 5th. I donāt want to use 10% gasohol because that consistently costs me 3 mpg less mileage. I have kept all my gas receipts & milage data since I bought the car 4 years ago (36,000 miles).
THAT keeps the engine from revin up as strong as it can go? Hun. Well if I donāt HAVE to use premium, then I think its a good mod after all. Canāt afford premium right now anyways.
In effect the knock sensor is like a back up for the computer to make sure that its not over advancing the timeing. If for whatever reason (obviously the timing curves of these cars isnt too extreme lol) it senses a lot of detonation it will start to retard timing by a degree at a time across the entire power band untill it sees it go away. Thats One of the reasons they run much better when its cool outside or the engine is cooler, the hotter the combustion chamber the higher the likelyhood of pre-ignition.
Shouldnāt have any effect on this. It is used to detect ping noises in the engine and retard the timming. But it also picks up all the other engine noises too.
Yeah, luckily for us the EEKV cpu in our cars isnt as advanced as most of them, or it would detect a ckt fault and set a mil lol in theory it should allow the engine to run the full programmed timing curve, I would strongly recommend not unpluggin it if your in higher altitudes or run regular, detonation can severly damage the piston surfaces and rings.
the correct way to do this it to wrap the threads of the knock sensor with teflon tap there for making it less sensitive to internal vibrations but still allowing it to work on such errors as preignition and detenation. and it is emissions legal.
I said it on Team, and Iāll say it here. I tried this within the 2nd week that this āmodā was out. I got rattle sounds and clicking out the ass around 2,250 and 2,600 rpm from my engine. Yea, the power curve was smoother, and it pulled a lil more up higher, but I like my engine, and I want to keep it operating correctly so I plugged it back in.
I even ran down till the needle was on the red line for gas and filled up with 92octane, same resultā¦
This actually made my car drive a lot smoother. When I would shift it was enough to cause the knock sensor to go off and retard my timing, and drop my RPM a little bit and cause it to stutter slightly when I first was in gear. That has completely gone away and general acceleration is also MUCH smoother.
It seems people w/o S/R PCMs the āmodā works fine. I have talked to a few other S/R owners through AIM and they have had the same problem, they just dont feel like posting about itā¦
for all you ppl that want a supercharger on you zx2 if you use a focus zx2 head the jackson supercharger will bolt directly on your car then the only thing you have to change is the timing belt tensioner.
). By unplugging your knock sensor you will get a smooth power band with much more pulling power. It is just above your oil filter to the left and has a green plug on it. The release tab is on the bottom of the plug. Just press up on it while pulling the wire. I have done this and no longer have the power surge above 3000 rpm. It has the power from start all the way to max RPM. You might have to run 89 octane fuel, I did. YOU WILL NOT GET A CEL LIGHT.