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sensor identification help

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Old Jan 24, 2009 | 12:23 PM
  #1  
fychelio's Avatar
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From: San fernando Valley
Car: 1983 pontiac Trans am ws6
Engine: 350
Transmission: 700r4
Axle/Gears: ????
sensor identification help

small sensor on the back of the cylinder head on the drivers side, sensor is about as round as a quarter and has a flat blue top with two prongs coming out and no more than a 3/4" thich. i think its a knock sensor but wanted to double check. and do you need it? none of the cars at the yard had them.
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Old Jan 24, 2009 | 01:09 PM
  #2  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The knock sensor is on the block, in front of the starter (if your car has a knock sensor - only the EFI and L69's had them in '83).

I forget what it is, my Camaro doesn't have it, seem to remember something about an air inlet door?

Do you have the L69?
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Old Jan 24, 2009 | 01:17 PM
  #3  
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Car: 92 25th anv camaro rs
Engine: 305 tbi
Axle/Gears: 3.08s non posi
Re: sensor identification help

my v6 had that, it was one of the temp senors...
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Old Jan 24, 2009 | 01:18 PM
  #4  
fychelio's Avatar
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From: San fernando Valley
Car: 1983 pontiac Trans am ws6
Engine: 350
Transmission: 700r4
Axle/Gears: ????
Re: sensor identification help

i guess its not a knock sensor, i saw a picture of one and my car doesnt have that anywhere. this two prong sensor on the back of my ds head is made of aluminum. and no i dont think i have an L69 either
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that would prolly make more sense. thanks

Last edited by fychelio; Jan 24, 2009 at 01:19 PM. Reason: Automerged Doublepost
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Old Jan 24, 2009 | 05:09 PM
  #5  
fychelio's Avatar
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From: San fernando Valley
Car: 1983 pontiac Trans am ws6
Engine: 350
Transmission: 700r4
Axle/Gears: ????
Re: sensor identification help

couldnt find any v-6 engines wth a similair sensor on them and all the models relevant to mine have ground cables mounted their.
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Old Jan 24, 2009 | 05:12 PM
  #6  
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Car: 92 25th anv camaro rs
Engine: 305 tbi
Axle/Gears: 3.08s non posi
Re: sensor identification help

well mine is a 88 camaro, might hav chaged, sorry. what color is the wire coming out of it?
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Old Jan 24, 2009 | 05:28 PM
  #7  
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From: Midwest
Car: '82 Recaro T/A, '71 Trans Am
Engine: 305CFI/455HO
Transmission: TH700R4/M22
Axle/Gears: 3.23/3.42
Re: sensor identification help

That is the cold feed switch for the ram air hood louver on carburated Trans Ams. It senses engine metal temperature and won't allow power to the flapper door until the engine reaches about 150 degrees.

Bypassing it will allow the flapper door to open when the engine is cold and can cause hesitation and stumbling if the outside temp is also low.
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Old Jan 24, 2009 | 05:31 PM
  #8  
fychelio's Avatar
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From: San fernando Valley
Car: 1983 pontiac Trans am ws6
Engine: 350
Transmission: 700r4
Axle/Gears: ????
Re: sensor identification help

wow where do i get another one? lol i snapped mine by over tightening it. makes sense no cars had it i didnt see any trans am with the hood scoop. thanks alot
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