Car acting Like it needs tuneup again!!!! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-25-2009, 03:07 PM   #1
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Default Car acting Like it needs tuneup again!!!!

Just replaced Spark plugs and wires a couple of months ago..now my car is acting like it needs a tuneup again...happened all of sudden today..what could be the problem?

Its a 1995 bonny, NA
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Old 04-25-2009, 05:14 PM   #2
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Quote:
Originally Posted by bonnie21 View Post
Just replaced Spark plugs and wires a couple of months ago..now my car is acting like it needs a tuneup again...happened all of sudden today..what could be the problem?

Its a 1995 bonny, NA
What exactly is your car doing that makes you think it needs a tune up? Is the Service Engine Soon (SES) light on?
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Old 04-25-2009, 06:32 PM   #3
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Pull the plugs and inspect. Post pictures if you can. That will tell us a lot about what'* going on
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Old 04-26-2009, 12:23 AM   #4
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Its riding rough from takeoff but kinda smooths out. When sitting idle i can go to the tail pipe and hear it sputtering. My Engine light has been on for a while, believe it is the o2 sensor. It has been riding fine since my last tune up. Im puzzled guys.
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Old 04-26-2009, 01:50 AM   #5
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If your check engine light is on, you have one or more codes set. Tuning it up will likely not work, or work for only a short time if you do not correct the problem that is setting the code. All of the factory manual driveability troubleshooting procedures start with 'check codes, repair as necessary to clear codes' before going on to anything else. On another thread, someone said Autozone will check your codes for free; i have not validated that as I have my own scan tool... but getting at and fixing whatever is tripping that code is your first step. Get to it quickly, if you are right and it is the O2 sensor your engine is likely running in limp home mode, which is overly rich, and will likely cook your catalytic converter, and you don't even want to know how much one of those costs. The rich mixture may also be fouling plugs, etc, which may be the source of its rough running.
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Old 04-26-2009, 02:28 PM   #6
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The SES light is a concern and needs to be read. Autozone will do it for free!

Also..when was the last time you changed the fuel filter?
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Old 04-28-2009, 08:10 PM   #7
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changed my o2 sensor and put in new plugs...car is running good for now..i noticed some oil on two of the old spark plugs...im scared to ask what that means.....
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Old 04-28-2009, 08:13 PM   #8
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Which two plugs? Are they matched to the same coil?
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Old 04-28-2009, 08:17 PM   #9
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they were both from the front 3...the back three were just whitish
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Old 04-28-2009, 08:20 PM   #10
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Is there any chance you can post a picture of the plugs?
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