92 LT1 Knock Sensor Q?
Thread Starter
Race Director
Joined: Jul 2000
Posts: 14,075
Likes: 18
92 LT1 Knock Sensor Q?
Getting a Code 43. I haven't gone through the diagnosis yet but I've got a couple of simple questions first:
Does the coolant need to be drained to remove sensor? One (non-factory) book says it does; my factory manual says nothing about it.
Second: Can/should I buy LT4 sensors? The non-factory book indicates they're an improvment.
Does the coolant need to be drained to remove sensor? One (non-factory) book says it does; my factory manual says nothing about it.
Second: Can/should I buy LT4 sensors? The non-factory book indicates they're an improvment.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
If you're quick you can remove and replace the knock sensors without losing much coolant.
As for the LT4 sensors I'd stick with the LT1 sensors unless swapping to the LT4 knock module, but that's just my opinion.
As for the LT4 sensors I'd stick with the LT1 sensors unless swapping to the LT4 knock module, but that's just my opinion.
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
And he has a 92, so talking of the LT4KM is just silly.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
But I have replaced a KS without draining the coolant
MIke
Thread Starter
Race Director
Joined: Jul 2000
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As it turns out, I didn't have to do either. I got under the car to check volts and ohms, and everything checked. So I cleaned up the connections and that fixed the problem.
Here's an "undocumented feature" that isn't in the factory manual ('92 anyway). If there's a problem with that circiut, both cooling fans run, a failsafe mode I guess. The manual indicates that this will occur with a coolant or oil temp sensing circuit code, but it's with this issue too.
Time to get cleaned up and go for a drive. :cheers
Here's an "undocumented feature" that isn't in the factory manual ('92 anyway). If there's a problem with that circiut, both cooling fans run, a failsafe mode I guess. The manual indicates that this will occur with a coolant or oil temp sensing circuit code, but it's with this issue too.
Time to get cleaned up and go for a drive. :cheers
Le Mans Master
Joined: Feb 2000
Posts: 9,715
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From: Kempner Texas
Thread Starter
Race Director
Joined: Jul 2000
Posts: 14,075
Likes: 18
Certainly running great now. The fault must have dialed back the timing, another failsafe feature, I hadn't realized the performance loss until I just drove it with it fixed.
...it's back in "most favored" status again.
...it's back in "most favored" status again.
Intermediate
Joined: Mar 2005
Posts: 34
Likes: 0
From: Island Heights NJ
C4 LT1 '93 Engine Knock Sensor
I have the same problem (Code 43), which is as a result of trying to remove the knock sensor while draining the coolant. I probably ruined the sensor because I could not budge it with a 23MM socket.
Can anyone reccomend a tool/socket/wrench for removing this sensor? I understand it also needs the specific torque setting or else code 43 will come up.
Considering the pain to remove/replace and torque, you are probably better off leaving the sensors alone, and draining coolant from the radiator and hose connections.
Can anyone reccomend a tool/socket/wrench for removing this sensor? I understand it also needs the specific torque setting or else code 43 will come up.
Considering the pain to remove/replace and torque, you are probably better off leaving the sensors alone, and draining coolant from the radiator and hose connections.
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