Hello,

Recently purchased a long block motor for my 1992 Toyota pick-up. I just noticed the knock wire has a different plug on it after doing some looking it will work for years 88-91 not mine. Question is what is the main difference between the two? Can I simply cut and splice on different connector? Help is appreciated

Plug on my old engine

New plug

 

That’s a pretty sensitive wire. Did it come from a dealer? I’d check and make sure you got the correct one. If not from a dealer I’d recommend getting oem wire. Sensor, too. Such a terrible location to have issues.

removing the terminal ends from the connector would be a vastly better way to swap connectors than cut/splice, and that wire would be particularly hard to splice properly.

 

When it comes to sensors, I always go Toyota OEM, if they are still available, then aftermarket Denso. Bought a generic oil pressure gauge sensor and it didn't out put enough. At idle the needle sat at near zero and running 70 mph the needle barely exceeded the normal idle indication. Installed an OEM sensor and readings were back to normal.

 

I don't recognize the round connector (but you might be right about the application). The correct wire (commonly referred to as the "pigtail" around here) is easy to get and not even very expensive. https://parts.lakelandtoyota.com/p/_...221935010.html
The wire (on both sides of the connector) is shielded, so splicing it would be non-trivial. For the money, hell, just get the right part.

Sensor? The sensors are very tough and rarely fail (unlike the pigtail). If you have an OEM sensor with the new long block, great. If not OEM, you might want to think about swapping it. (Kinda spendy: https://parts.lakelandtoyota.com/p/_...961520010.html) I have no reason to think that an after-market sensor won't work, but replacing it is a BDD.

 

I had a bad knock sensor on my 99 Runner. Code for the sensor(s) coming from the ECU. My mech, kind guy that he is, put inexpensive, after-market, sensors on for me. The ECU still threw the codes for sensors. I suggested, strongly, OEM parts be used. He got a pair of OEM sensors from the dealership up the street, and put them in. Codes cleared, never showed up again.

The ECU seems to have a problem with non-OEM parts. You might consider this when you go to get new sensors, if you do.

Pat☺

 

Thank you guys for the input I’ll get the correct wire ordered. And see if the sensor is oem. I’m sure this won’t be my last post during this project I appreciate your knowledge and advise!