5.3 knock/cam sensor not connected - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Slowy-gonzalez · 07-11-2018, 04:33 PM

I had done one of this swaps about 10 yea4s ago, however I recently bought a truck that swap was done by someone else.while it seems like they put some quality stuff as headers, trans controller, hid the wires etc etc , i removed the intake today and i notice the sensor on the rear of the engine is not connected nor it was connected ever since there is no wire connector going to it. The truck runs very good and strong but how is this possible? The harness is not hooked up to a oem ecm. Instead it has a aftermarket engine module, but I thought the sensor was needed for the engine to actually run. Any ideas

BR3W CITY · 07-11-2018, 10:43 PM

Depends on what you mean by aftermarket engine module. Physically an LS motor can run without any of its sensors, it just wouldn't have fuel or spark control. Things like Megasquirt will run a different cam sensor. Without cam sensor reference it would just fire all the coils simultaneously

87chevy.com · 07-11-2018, 11:26 PM

Quote:

Originally Posted by Slowy-gonzalez

I had done one of this swaps about 10 yea4s ago, however I recently bought a truck that swap was done by someone else.while it seems like they put some quality stuff as headers, trans controller, hid the wires etc etc , i removed the intake today and i notice the sensor on the rear of the engine is not connected nor it was connected ever since there is no wire connector going to it. The truck runs very good and strong but how is this possible? The harness is not hooked up to a oem ecm. Instead it has a aftermarket engine module, but I thought the sensor was needed for the engine to actually run. Any ideas

LS... sensor at the back of the engine. Sounds like oil psi.. ECU doesn't need it. Take a picture and post it

Slowy-gonzalez · 07-12-2018, 09:14 AM

I found out the secret last night, the previous owner or whoever swapped the engine, actually had the sensor re located to the front timing gear/chain cover.

Johns58stepside · 07-12-2018, 11:39 PM

That’s the valve lifter oil manifold connector it is what is used to activate the dod lifters. I assume they tuned it not to use them and just didn’t swap the covers out. Maybe it still has all the active lifters in the engine

Slowy-gonzalez · 07-14-2018, 10:08 AM

I see. I have only done one of this ls swaps and it was 10 years ago, the trucks runs very strong no issues, so i wasnt very worry about it , thanks for the help

07-11-2018, 04:33 PM	#1
Slowy-gonzalez Registered User Join Date: Dec 2017 Location: Poteet TX Posts: 30	5.3 knock/cam sensor not connected I had done one of this swaps about 10 yea4s ago, however I recently bought a truck that swap was done by someone else.while it seems like they put some quality stuff as headers, trans controller, hid the wires etc etc , i removed the intake today and i notice the sensor on the rear of the engine is not connected nor it was connected ever since there is no wire connector going to it. The truck runs very good and strong but how is this possible? The harness is not hooked up to a oem ecm. Instead it has a aftermarket engine module, but I thought the sensor was needed for the engine to actually run. Any ideas __________________ 2017 king ranch power stroke 57 chevy big rear window, camaro front clip, rear is notched 57 chevy truck, air ride, ls swapped. 52 chevy truck waiting its turn.

07-11-2018, 10:43 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 5.3 knock/cam sensor not connected Depends on what you mean by aftermarket engine module. Physically an LS motor can run without any of its sensors, it just wouldn't have fuel or spark control. Things like Megasquirt will run a different cam sensor. Without cam sensor reference it would just fire all the coils simultaneously __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

07-12-2018, 09:14 AM	#4
Slowy-gonzalez Registered User Join Date: Dec 2017 Location: Poteet TX Posts: 30	Re: 5.3 knock/cam sensor not connected I found out the secret last night, the previous owner or whoever swapped the engine, actually had the sensor re located to the front timing gear/chain cover. Attached Images __________________ 2017 king ranch power stroke 57 chevy big rear window, camaro front clip, rear is notched 57 chevy truck, air ride, ls swapped. 52 chevy truck waiting its turn.

07-12-2018, 11:39 PM	#5
Johns58stepside Registered User Join Date: Oct 2015 Location: Tuttle Oklahoma Posts: 23	Re: 5.3 knock/cam sensor not connected That’s the valve lifter oil manifold connector it is what is used to activate the dod lifters. I assume they tuned it not to use them and just didn’t swap the covers out. Maybe it still has all the active lifters in the engine

07-14-2018, 10:08 AM	#6
Slowy-gonzalez Registered User Join Date: Dec 2017 Location: Poteet TX Posts: 30	Re: 5.3 knock/cam sensor not connected I see. I have only done one of this ls swaps and it was 10 years ago, the trucks runs very strong no issues, so i wasnt very worry about it , thanks for the help __________________ 2017 king ranch power stroke 57 chevy big rear window, camaro front clip, rear is notched 57 chevy truck, air ride, ls swapped. 52 chevy truck waiting its turn.

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