blinking check engine light Misfiring/Knocking at Idle only - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-02-2008, 02:43 PM   #11
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That is not a bad coil. Out of spec by a little, but not bad.

Your plugs are fouled with fuel from not firing correctly. You also have the wrong plugs. Get rid of the platinums. Never run them in a supercharged or turbo engine.
Copper or Irridium ONLY.

The gas smell in your oil is because you weren't combusting the fuel in the cylinders, and it'* migrated past the rings into the oil.

I suggest changing your oil when this is all over.
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Old 02-02-2008, 03:47 PM   #12
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Just change the spark plugs last night, but I changed them with double platinums . Can I just run with them temporally just until i get enough to buy the Iridium spark plugs ($10 each $60 total). I understand what you guys are saying about the Iridium spark plugs, but I'm running on a very very tight budget. I also found out that the guy I bought the car from (mechanic) had NGK V-Power spark plugs in the car which I think are regular spark plugs. After I change the oil will it run better. Once again thank so much for the help you guys.
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Old 02-02-2008, 03:54 PM   #13
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NGK TR-55 V-powers are less than two bucks a plug. I suggest losing the plats now, and selling them at half price to a friend.

Don't waste your money on Irridium. There'* frankly zero performance advantage, and only a lifetime advantage. But the V-powers will run you PLENTY long enough in that engine.
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Old 02-02-2008, 04:19 PM   #14
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Wow so platinum are that bad for that car? Also about the gas in the oil would that cause the misfire?
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Old 02-02-2008, 04:25 PM   #15
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Yes, plats are that bad in a supercharged engine (why I mentioned above a couple times).

No, gas in the oil won't cause a misfire. It'll cause excessive bearing and internal wear on your engine.

It can also detonate, and blow out the bottom of your motor. Get that oil changed.
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Old 02-02-2008, 05:04 PM   #16
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Damn just paid $60 for them plugs and wires. Man, This is burning a hole in my pocket. So where can I find some cheap copper plug for cheap? Also my dad just got the oil changed. Thanks wellwren you have been a big help
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Old 02-02-2008, 05:30 PM   #17
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I am not sure why you bought more expensive platinums if you are on a tight budget, like willwren said, the NGKs are dirt cheep, I know I paid about less then $2 a plug.
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Old 02-02-2008, 08:49 PM   #18
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Hey guys just change the spark plugs like you all said and test drove it. Excuse me saying it, but this car has some BALLS!! I drove an GTP and it seems faster than that.

So as I was getting the oil change for the gas smell in the oil. The mechanic said that my resonator was bad and I needed to replace it. So as he was replacing it he found out that the guy who first had the car (so called mechanic) took the catalytic converter off. So the mechanic had to put a straight pipe on saying it would be $65 for the CAT and $60 to install it. WTF that is Illegal in Illinois and I definetly will not pass emission. But by taking off the bad resonator under full throttle the CEL didn't blink and it was even faster. So Anybody know where I could find a CAT for cheap? Could this cause the CEL to stay on, have a bad gas smell out of the exhuast, and cause the car to have a misfire under full throttle?
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Old 02-03-2008, 12:03 AM   #19
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No, the resonator has no effect on the CEL at all.

With no cat, did he spoof the rear O2? If the previous owner took the converter off, it would ALREADY be straight piped.

You're not making sense. Describe what you're calling the res and cat.
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Old 02-03-2008, 12:43 AM   #20
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II dont know. Forget what I said about the resonator. All I know is that I need a new Cat. Converter. The mechanic told me that the cat was gone so I think I think the other owner did have a straight pipe on it. Which is causing the CEL code from the O2 sensor.
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