Buick LeSabre 1990 questions - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-03-2014, 08:36 AM   #31
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Okay so i use od just above 60mph in summertimes.

Thanks.


In two days are new parts in my home so lets see how it works then. Crank sensor, plugs, wires etc.
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Old 02-03-2014, 08:37 AM   #32
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they do act better at lower speed when running right too
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Old 02-06-2014, 12:26 PM   #33
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Now i change new plugs and wires.


4 plugs (all 3 radiator side) and 1 from sheet were like new and never used. White and gap was metal colored.


2 plugs from sheet side were like anothers but they have white coating on gap. It disappeared when i sweep it swinger very soft.






I check internet and someone says its okay, someone says it running lean and someone says overheat.


What do you think in this case?


Mpg is not super low and lambda seems to be a new and no faults codes about lean.



I dont know how old plugs was, delco. Outside was ac delco text under rust with every plug.

Edit: electrode and gap were okay on every plug. Ps this picture is not my plug but very similar.
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Old 02-06-2014, 02:30 PM   #34
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alot of times white crud is coolant leak. are you loosing any? lean or hot plugs most of the time are the metal turns blueish and eats the electrode
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Old 02-06-2014, 03:32 PM   #35
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Damn i looked bad those in dark. Now i have pictures of my own plugs.

There is link. you can see more pictures pressing needles in picture SAM 4053 - Aijaa.com


So all plugs were little bit gray, no one wasnt that white like my first example picture.

On the link is picture of all of six plugs.


My cameras flash will give some effect so white is whiter than normal and without flash is little bit too dark.

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Old 02-06-2014, 04:52 PM   #36
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cont see the pics but if its gray its fine if its white at all thats, usually something in there that is not supposed to be
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Old 02-06-2014, 05:54 PM   #37
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Justin in the link there is a side bar, if u bring ur mouse overtop it will eventually show an arrow, to see the pics... If not here is the photo of the 6 plugs.
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Old 02-06-2014, 06:05 PM   #38
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3rd on from the left doesnt look that great but if you dont know how long it has been in the car its hard to say if its a big deal or not
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Old 02-06-2014, 06:27 PM   #39
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You mean just outer habitat? (that which has most rust than others)

How about gaps and electrodes, fine or still coolant or something?

All are pretty same to my eye in that all six picture.

If its coolant, how the hell it leaks all six cylindres? Oil and coolant looks great, doesnt mix.


I dont know about coolant loss because lower hose leaked but now its fixed about 200miles. Not notable loss.


Exhaust will give steam pretty much but there is freeze. And i have been many cars without head gasket issues but still smokes steam and working well.


Upper hose and lower radiator hose arent rock hard so aint not pressure which could occur head gasket.
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Old 02-06-2014, 09:19 PM   #40
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i dont know a whole lot about the common issues for that but any engine can have intake manifold gasket leaks, especially on a 24 year old engine
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