After market efi. Do I need knock sensors

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pontiacgp

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Mar 31, 2006
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if you have a factory computer controlled distributor then your engine would already have a knock sensor. If you don't have a computer controlled ignition system then a knock sensor has no place to send it's info.
 

Tony1968

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Not using stock ecm. Going with Holley or Fast most likely. This is a 6 liter lq4. Can't find information about whether those efi systems use knock sensors
 
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pontiacgp

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Mar 31, 2006
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Not using stock ecm. Going with Holley or Fast most likely. This is a 6 liter lq4. Can't find information about whether those efi systems use knock sensors

Like I said a knock sensor involves the computer and timing, it has nothing to do with the fuel injection system so that is why the systems you are looking at don't have any information about a knock sensor. The other thing is if you do not have any knock sensors installed in the block now how are you going to install them?
 
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Streetbu

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Stock LQ4's use knock sensors. Aftermarket efi systems do not AFAIK....
 

Northernregal

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The Holley system hooks into a knock sensor but you don’t have to have it do much in your tune. A general consensus is that you stop making power gains before knock happens. If you add timing and you don’t see a difference then you are getting close to the edge so drop a degree or two.
 
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Tony1968

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so is it your opinion that i can do away with the sensors and replace valley cover with something prettier ?
 
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