Topic: Knock sensor

[Humboldt County Crawler]

Whats it do,whats it for,do I need it?My new engine is a 22r block and has no place for it.

[2manytoys]

22RE's use it. Senses engine knock like from bad gas or too much timing advance. ECM will then retard ignition timing. Mine will give a code and check engine light comes on.

Usually screws into a threaded hole in block near oil pressure sender.

[Humboldt County Crawler [OP]]

Thanks but will it cause drivability issues?Idont have to worry bout the check engine light I dont have one I've got a sheet metal dash and my new engine block is a 22r so nowhere to screw it into

[Snowtoy]

Location(pic from the web):


The ecu needs to receive a signal from the KS above about 2k rpms, w/o receiving the signal, the ecu will go into "safe mode" to prevent engine damage.  This safe mode will reduce performance and likely drop fuel economy as well.  Is there a spot cast in the block for the KS, that you can drill and tap?

[Humboldt County Crawler [OP]]

negitave thanks that sucks.I prob can bore out one of the hole towards front of engine

[2manytoys]

LC Engineering has a page somwhere on it's site where it shows a way to relocate the sensor for performance reasons.

I did this by drilling per their instructions. It's been a while so I don't remember the details. I think it was one of the unused engine mount bosses?  I do remember it was easy to do.

[Humboldt County Crawler [OP]]

yea thanks I think thats what I'll do

[norcal98]

negitave thanks that sucks.I prob can bore out one of the hole towards front of engine

Need it for sure.  Computer does all kinds things that will drive you crazy when not working or bad connection.  There are a few modification guides on yota tech if you search there.  

[Bazookamn]

You have a 22r carb motor or a 22re motor with an older 22r block which has no spot for the sensor?

[Humboldt County Crawler [OP]]

Truck is 85 efi got a free 22r that was in better shape than my old 420k mile 22re then got smoked out one night  :screwy:and now the knock sensor is lost in action.anyway I drilled and tapped a unused casting and got a used sensor from a friend no biggie runs like a champ just wondering if I could get by without it

[OOPS]

Are you in California? Is it street driven? I live in Roseville and mine has to have a CEL in order to pass SMOG.

[Humboldt County Crawler [OP]]

 :smokin:Yes in Humboldt County Eureka Cali. and yes driven on street we only have to smog when you buy or sell a rig 

[OOPS]

:smokin:Yes in Humboldt County Eureka Cali. and yes driven on street we only have to smog when you buy or sell a rig 

Lucky you!!!!!

[Humboldt County Crawler [OP]]

 :shocking:you guys gotta do the by anualy thing?Sucks

[Bazookamn]

W/o a knock sensor it will trip a code and go to fail safe which enriches fuel mixture causing poor mileage.   Use it.