New knock sensor trouble

[green961500]

Hello everyone I have a 1988 gmc k1500 with the 5.7 tbi I installed a new ac delco knock sensor and I got a code 43 after driving for 10 minutes. Could this be a defective sensor?

Backstory the truck is an original 5.0 tbi truck but I installed a chip from Harris performance to run it as a 350 I've installed 350 injectors, egr deleted, new coolant temp sensor new map sensor new tps sensor new esc module new iac sensor. I wanted to put the 350 knock sensor in but it keeps throwing codes. The old one does not any help is appreciated and thanks in advance.

 

[PlayingWithTBI]

new coolant temp sensor new map sensor new tps sensor new esc module new iac sensor.

Is your ESC module for a 5.0 or a 5.7? The knock sensor needs to be matched to the module. The KS needs to be torqued properly - IIRC something like 18 Ft/Lbs

 

[green961500]

Yes the esc module is for the 5.7 I did tourqe it to 18 ft/lbs but it seems like everytime I put the new KS in it throws code 43

 

[green961500]

Is your ESC module for a 5.0 or a 5.7? The knock sensor needs to be matched to the module. The KS needs to be torqued properly - IIRC something like 18 Ft/Lbs

The part number to the KS sensor I bought is ac delco 213-324

 

[Schurkey]

WHY do you need a new knock sensor? Does the scan tool show excessive knock counts? Not enough knock counts? Engine computer threw a "code" for knock sensor?

What is wrong with the other knock sensor?

Have you checked the knock sensor wire harness for breaks or corrosion? VERY common.

Connect a scan tool, verify that the knock sensor works.

Download the service manual set for your vehicle from the links in the Sticky threads section of the Engine forum; follow the diagnostic procedure for Code 43.

Kinda concerned that disabling the EGR has got the knock sensor overworked and angry.

 

[evilunclegrimace]

Just hook a wire to the old knock sensor and hold on to the the bare end of the wire and smack it on a hard surface, you will find out if it is defective right away.

 

[green961500]

WHY do you need a new knock sensor? Does the scan tool show excessive knock counts? Not enough knock counts? Engine computer threw a "code" for knock sensor?

What is wrong with the other knock sensor?

Have you checked the knock sensor wire harness for breaks or corrosion? VERY common.

Connect a scan tool, verify that the knock sensor works.

Download the service manual set for your vehicle from the links in the Sticky threads section of the Engine forum; follow the diagnostic procedure for Code 43.

Kinda concerned that disabling the EGR has got the knock sensor overworked and angry.

I bought a new knock sensor cause someone told me 5.0 and 5.7 knock sensors are different I got a custom chip by Harris performance and the egr is tuned out

 

[Schurkey]

I bought a new knock sensor cause someone told me 5.0 and 5.7 knock sensors are different

They are, far as I know. May even be differently-colored on the plastic part.

I got a custom chip by Harris performance and the egr is tuned out

Why?

 

[green961500]

They are, far as I know. May even be differently-colored on the plastic part.


Why?

I was told it would be 1 less thing to worry about im used to carbs the fuel injection stuff is new to me lol