LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Knock Sensor help...

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Old Apr 18, 2010 | 10:14 PM
  #1  
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Default Knock Sensor help...

I'll say it before you guys have a chance to say it... I AM AN IDIOT!!!

I finally got the scanner to give me an error code (43), knock sensor. So I go to Autozone and pick up a new one. I get home and start taking off the sensor and it wont come off. Long story short... I break off the sensor, leaving the threaded part still on the block. My question is, How do I remove the threaded portion with out causing more damage. ALL ideas welcomed.

Thank you for taking time to help me out.
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Old Apr 18, 2010 | 10:53 PM
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Try an easy out from home depot or Napa and drill the center and see if you can get it out that way.....

Matt
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Old Apr 18, 2010 | 11:12 PM
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Be aware that when you drill through what is left of the knock sensor, you will get a bath of coolant. That hole is also a coolant drain.
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Old Apr 19, 2010 | 11:06 AM
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Default Update...

ShBox,

Will I be damaging anything if I drill some of the leftover plastic in the coolant area in the engine?

Update: I hit the leftover thread with some PB Blaster last night. I will try and get it out later today. Should I turn the engine on for a bit?

Thanks...
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Old Apr 19, 2010 | 01:19 PM
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Originally Posted by f4mdtwr
ShBox,

Will I be damaging anything if I drill some of the leftover plastic in the coolant area in the engine?

Update: I hit the leftover thread with some PB Blaster last night. I will try and get it out later today. Should I turn the engine on for a bit?

Thanks...
What plastic?

I would remove the partial pipe in block without starting the motor. If you run it now you will be bathed in hot coolant. I would use a cordless drill and have a towel to keep the coolant from all going on you. You will be soaked in it.

REMEMBER cordless drill if you need to drill to get easyout in...and use jack stands. It isn't a hard job prep takes longer than doing it, but you are dead forever if you don't think ahead and jack fails.

Good luck
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Old Apr 19, 2010 | 02:10 PM
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Originally Posted by f4mdtwr
Will I be damaging anything if I drill some of the leftover plastic in the coolant area in the engine?
No, just make sure you're using a battery powered drill, not a plug in the wall drill. If you use a 110v drill, it'll probably get real exciting down there.

Originally Posted by f4mdtwr
Update: I hit the leftover thread with some PB Blaster last night. I will try and get it out later today. Should I turn the engine on for a bit?
No
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Old Apr 19, 2010 | 03:08 PM
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Default giving it a try

Great! Thanks for all of your guys input. I will try and remove the leftover stub with vise grips first, if it doesn't work, then I'll use the easyout.
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Old Apr 21, 2010 | 08:57 PM
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Default Another update

Changed the knock sensor and the error code is gone woohoooo!!!

Now we have another problem. The engine is misfiring and the fan is still on, WHY?????

NO ERROR CODES whatsoever.

Help, please!

Thanks
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Old Apr 22, 2010 | 12:40 AM
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where is the misfire? idle or under power?
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Old Apr 22, 2010 | 01:16 PM
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Default Misfiring

Matt,

It misfires at idle... It also hesitates (bogs) when I get on the pedel. This started happening after I changed the knock sensor. No burnt wires, havent checked the spark plugs. What else can I look for?
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Old Apr 26, 2010 | 08:29 AM
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How old are the plug wires? Wait until tonight and pop the hood with the car running and look at the plug wires, you may see a spark show. If so just change that wire (or all of them) and it should go away.
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