1g Knock sensor in a 2g

[RossY]

I saw a thread awhile back about someone who had a 2g knock sensor in their 1g by accident and that this was a bad thing. I believe they said that the 2g sensor is more sensitive or something like that. Well my question is can a 1g sensor be used in a 2g? If they can't could you please explain?

Thanks

 

[poorboyj]

From what I understand, the 1G ECU is a little dumb, so when it hears something coming from the knock sensor within it's specific knock range it pulls timing.

The 2G ECU is smarter, so the sensor can be more sensitive and the ECU can determine what is real knock.

So, with a 1G ECU and 2G knock sensor, the sensitive sensor will send a lot of noise to the ECU, the ECU cannot reallt differentiate what is what so it'll just pull timing (READ: Slow, but safe).

But, with a 2g ECU and a 1G knock sensor, the lazy sensor won't put out much and the ECU will give you timing when maybe you should be getting it (READ: Fast, but dangerous).

Sorry for the 3rd grade explaination, but you get the point. Also, let it be known, I hae not experienced any of this personally. This is just what I've learned from using the AEM and the AEM forums, you might want to do a search there in the DSM section.

Jay

 

[RossY]

i was curious because i have the jdm 1g sensor in my 2g because i bought the car as a shell and dropped in the jdm. So i was wondering if the 1g sensor was doing any good at all. I have noticed since installing my evo 16g that randomly timing seems to get pulled. Im not sure if that is actually whats happening but all i know is that the car loses power and the egt's start to shoot up really fast. I would also associate this with a lean condition though.

 

[LightningGSX]

The 1G knock sensor is a wideband knock sensor, which means it needs a bandpass filter to yield useful information.2G's have a resonant sensor, which means it uses its own physical properties to create a bandpass filter.So in general, swapping either into a vehicle without the proper ECU won't work.