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82 no longer running in open loop.

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Old 09-29-2010, 05:16 PM
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Maleficio
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Default 82 no longer running in open loop.

Replaced a 28 year old oxygen sensor today. Cost me $22 from NAPA, universal Bosch unit. Perfect fit, easy install, car responded instantly, running much better, hopefully will gain some efficiency.

Old 09-29-2010, 05:18 PM
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Maleficio
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Now I want to figure out which injector is leaking. I wonder if simply inspecting the piston heads for excessive carbon buildup will tell which one's are bad?

Last time I changed plugs, I looked at the piston heads, some were shiny clean, some were not. I figure a leaky injector will create carbon buildup in the cylinder.

What say you?
Old 09-29-2010, 05:44 PM
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Mrmerlin
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a shiny clean piston indicates a coolant leak into the cylinder,
normal would be coated with carbon, the spark plugs should be enough to show you what cylinder has more or less fuel .
BUT if one or two of the plugs are clean or have rust deposits then it indicates coolant leaking into the cylinder

FWIW I would suggest that you use a factory Bosch O2 sensor a little searching and you may find one on Amazon, no cutting , note that one or more of the wires needs a path to outside air crimping or soldering the ends closes the pathway and then the sensor will not function as it should.
I know you have heard this before but simply cutting corners for your GT isnt a good idea,
pays the man and drive on
Old 09-29-2010, 05:56 PM
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Maleficio
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Originally Posted by Mrmerlin
a shiny clean piston indicates a coolant leak into the cylinder,
normal would be coated with carbon, the spark plugs should be enough to show you what cylinder has more or less fuel .
BUT if one or two of the plugs are clean or have rust deposits then it indicates coolant leaking into the cylinder

FWIW I would suggest that you use a factory Bosch O2 sensor a little searching and you may find one on Amazon, no cutting , note that one or more of the wires needs a path to outside air crimping or soldering the ends closes the pathway and then the sensor will not function as it should.
I know you have heard this before but simply cutting corners for your GT isnt a good idea,
pays the man and drive on

Coolant, eh? That sucks. I should be able to see the coolant affecting the oil, right? Foam, maybe. Oil looks fine.

The O2 sensor has just one wire. With the old sensor hooked up, the car run very strangely, cycling, never could stabilize the mixture. Install this one, perfectly stable, no problems. Do you think the factory sensor would provide greater accuracy, longer life?
Old 09-29-2010, 06:16 PM
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to test the oil for coolant you can either do a hydrocarbon test w the block tester from NAPA about 50.00 for the tool set

or get some of the paste that gas stations use to test the gas for water you smear the paste on the dipstick and dip it into the oil this may be less accurate though as its made to test gasoline.
I dont know what sensor you used but I would say that an original sensor would probably work the best
Old 09-29-2010, 06:29 PM
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Maleficio
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I installed this one. I'm thinking it's fine because it's the only model Pelican offers for the 82.

http://www.pelicanparts.com/cgi-bin/...0%281980-82%29



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