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2005 Cadillac DeVille
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3 Posts
Discussion Starter · #1 ·
The car had been running like a top, then developed this engine knock. I read the codes: random cylinder misfire. Parked it until I could find help, found metal shavings in the oil. I can't find anyone who can tell me what's going on or what needs to happen. Help.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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21,251 Posts
The car had been running like a top, then developed this engine knock. I read the codes: random cylinder misfire. Parked it until I could find help, found metal shavings in the oil. I can't find anyone who can tell me what's going on or what needs to happen. Help.
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P0300 is a generic misfire code -
our on-board scanners will not display WHICH cylinder is misfiring -
although that information IS stored in the computer -

take the car to any big auto parts store and ask them to check the codes -
P0301 is a misfire in cylinder #1 - P0302 is cylinder #2 - P0303 is for cylinder #3 - etc-

once you discover WHICH cylinder is misfiring -
diagnosis is MUCH easier -
 

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Registered
2005 Cadillac DeVille
Joined
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3 Posts
Discussion Starter · #3 ·
===================
P0300 is a generic misfire code -
our on-board scanners will not display WHICH cylinder is misfiring -
although that information IS stored in the computer -

take the car to any big auto parts store and ask them to check the codes -
P0301 is a misfire in cylinder #1 - P0302 is cylinder #2 - P0303 is for cylinder #3 - etc-

once you discover WHICH cylinder is misfiring -
diagnosis is MUCH easier -
Is it ok to drive like this? I've had it parked for fear of making things worse :/
 

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Registered
2005 Cadillac DeVille
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3 Posts
Discussion Starter · #5 ·
I rented a code reader from AutoZone and the code still came up as a random cylinder misfire. Any thoughts on what to do next?
 

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70 Deville 78 Seville 92 Deville 03 Deville
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1,032 Posts
I hope you are mistaken about the metal shavings in the oil. Autozone must rent out cheap scanners. All you need is a little better one.
 
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