WTF is this???
#1
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Car: 1986 Pontiac Firebird S/E
Engine: 305 carb'd V8
Transmission: 4-speed auto
Axle/Gears: Stock
WTF is this???
I was under the car changing out the positive battery cable and saw this:
Attachment 167369
Help me out here. Where does it go? That is the back of the starter you are looking at just in case anyone was wondering.
Attachment 167369
Help me out here. Where does it go? That is the back of the starter you are looking at just in case anyone was wondering.
Last edited by Guro 305; 11-21-2008 at 07:02 PM.
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Car: 84 Trans Am
Engine: 383
Transmission: Tremec TKO
Axle/Gears: 10 bolt 3.73 lsd
Re: WTF is this???
that looks like the connector for either the knock sensor(located on the side of the block in front of the starter) or cooling fan temp switch(if equipped with electric cooling fan)
#7
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Re: WTF is this???
All GM EFI systems have a knock sensor (even the computer controlled q jets have them), basically if your car has a EST controlled HEI, it has a knock sensor.
Anyway, it's sort of a microphone and is used by the ESC (electronic spark control) to "listen" for characteristic accoustic signals indicating detonation (the knock sensor is engine specific, they are not all created equal). The knock sensor is hooked up to the ESC, basically an interpreter/amplifier. This signals the ECM in case of knock and then the ECM tells the ESC to back off the timing until the knock is gone, the EST then starts advancing the timing again.
Anyway, it's sort of a microphone and is used by the ESC (electronic spark control) to "listen" for characteristic accoustic signals indicating detonation (the knock sensor is engine specific, they are not all created equal). The knock sensor is hooked up to the ESC, basically an interpreter/amplifier. This signals the ECM in case of knock and then the ECM tells the ESC to back off the timing until the knock is gone, the EST then starts advancing the timing again.
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Yes, when they upped the LG4 compression to 9.5:1. L69's all had it.
Only L69's, and as I understand, the later LG4's (like '86-'87) finally had the CC carb. But, if not CC, no knock sensor (I believe).
Only L69's, and as I understand, the later LG4's (like '86-'87) finally had the CC carb. But, if not CC, no knock sensor (I believe).
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Car: 83 c10, 2015 silverado
Engine: 454, 5.3
Transmission: Turbo 35o, 6l80
Axle/Gears: 3.42, 3:23
Re: WTF is this???
if the knock sensor is broken or unhooked will you be able to hear knock or ping under hard acceleration?
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Re: WTF is this???
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Car: 83 c10, 2015 silverado
Engine: 454, 5.3
Transmission: Turbo 35o, 6l80
Axle/Gears: 3.42, 3:23
Re: WTF is this???
i think i need a new timing chain or something, my car knocks or pings i dunno whats what haha, my timing was 2 or 3 degrees retarded when i got it and i put it to 0 should i go higher maybe? i read somewhere tbi's like a little more timing?
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