7th Gen Swap Knock Sensor
 

My 7th gen 2014 swap motor came with both bank 1 and bank 2 knock sensors. I understand I will be using only one sensor with the 2003 ECU. Do I have to use the old sensor off my 2003 engine or can I utilize one of the new sensors already on the new motor?

It's recommended to install an old sensor as they ground through the motor, the 7th gen sensors ground back through the ECU

New sensor is a different resistance.

Thank you both. Any tricks to replacing bank 2 sensor without removing the intake manifold?

IM is only a few bolts lol. I can pull both in a few mins tops.

But now I have to order two new IM gaskets. I'm tired of waiting for parts!

For what? You can reuse the old DE gaskets over and over. The new upper IM gasket is round rubber, so it will always seal until it dries out and flattens in old age. The lower is the same ol nylon coated metal, iirc.

There's no reason to ever buy new gaskets until the engine has high miles and is old. And even then if you have two flat surfaces you can just use a tiny bead of rtv.

You put RTV on your breakfast toast. It's cool though, I'm ok with new gaskets.

Decisions, decisions...

https://www.nissanpartsdeal.com/part...module,,22060P

Eureka!

https://www.ebay.com/itm/GENUINE-KNO...-/371043410399

I run it bypassed in case it goes bad :P. I don't need no stinking KS. No knock even in summer heat at 37* ign timing. Colder plugs and 93 FTW, I guess.

I saw that in another thread. 560ohm was it? I emailed Darren about it and apparently he has a mail-in reflash service that will modify the ECU in a similar function as would an inline resistor.

560 sounds right.

I think I'll pick up the ebay sensor and I'm sure I have a 560 carbon film resistor laying around and play with it. I thought I was trippin when I noticed only one lead going to the knock sensor when I was first pulling the mangled harness that came with the car. Makes sense though if it grounds to the block. I'm still pissed I have to remove the IM.

Is there any downside to running a resistor rather than a knock sensor? As long as youre ontop of what is going on with your motor (ie; listening for knock,running a wideband, etc) then it shouldnt really make any difference from what i understand? Sounds dumb but id rather just solder in a resistor than dig out the sensor from my DE motor.

Aside from ECU mitigation of the harmful effects of detonation, I imagine not much. Sounds like you understand enough about ping to get a handle on it. Like child mentioned, cold plugs and premium. Keep an eye on temp and an ear out for knock. I may just bypass mine as well. I'll end up on Darren's dyno soon enough anyway so I think I'll just subtract it completely.

Or spend $60 for peace of mind and not have to worry about it. Do the right thing:

https://www.ebay.com/itm/GENUINE-KNO...-/371043410399

What piece of mind? I've been running my maxis bypassed for many years. And just use the old one, who cares? Free at they junkyard, too.

I'm replacing all engine sensors and gaskets with new, OEM as a preventative measure. When this swap is done, I'm not touching anything for at least 100k mi.