DTC P0300 Engine Misfire Detected - 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 04-28-2005, 08:54 PM   #11
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Quote:
Originally Posted by Wargamer
Done....

How'* that for a sig?
Lyman, SC.... Thats not anywhere near I-95 or I-26 is it? I could almost swear I have heard that Name somewhere

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Old 04-29-2005, 12:03 AM   #12
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Be careful attempting to gap Iridium plugs. The electrode in the center is very pinpoint like and I assume it would not take kindly to being pushed.
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Old 04-29-2005, 09:41 AM   #13
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Lyman is in between Spartanburg and Greenville, SC.... Very near I-85 running from Charlotte, NC to Atlanta, GA.


Bill,

Yeah... I saw that the plugs come pre-gapped and the Advanced Auto guy said to be sure not to gap them because of that very point. (heh, pun intended.)

Anyone else run these Iridium plugs yet?

Looks like I'm going to tackle the CAI next... I also have one of those drilled 180 therms to put in Saturday.
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Old 04-29-2005, 11:13 AM   #14
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We have lots of those plugs running. I believe they're also what ships in the car from the factory now.
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Old 04-29-2005, 02:37 PM   #15
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I've got iridiums in my car and my truck. They shipped in the truck, and I replaced the previous owners selection of Champions with them in the car.

On a side bar I didn't touch the plugs in my truck until 100K miles. They still worked great and it ran nice. Gap was about 3x what it should have been though. :o
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Old 04-29-2005, 05:16 PM   #16
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I'm on my second set in my 99. Very nice plugs and provide excellent throttle response. I'm a die hard NGK person now!
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Old 05-01-2005, 01:21 PM   #17
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Got the NGK Iridium TR55IX plugs in, a new set of AC DELCO wires (lifetime guarantee on those), PCV Valve, and the 180 drilled thermostat installed.

Runs like a champ now!

I'll get some pics up of those old Bosch plugs. Some of the old wires had charcoaled themselves... pure junk. I think it was a combo of the plugs and wires.

BTW, what'* everyone'* opinion on DEX COOL? Should I replace it with the green stuff?
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Old 05-01-2005, 01:23 PM   #18
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Don't switch your coolant. The two types aren't compatible, and your seals were specifically designed for DEX-cool. There'* some information in Techinfo, but keep in mind the problems stated there are not common.
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Old 05-01-2005, 01:25 PM   #19
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I havent heard anything good about the dextron, I would stick to what works...the green
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Old 05-01-2005, 01:46 PM   #20
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Ok, The guy at Advanced Auto said that GM is recommending to replace DEX COOL with green.... because the DEX COOL was eating the gaskets and such.

As a matter of fact, the previous owner had the green stuff in the car. I replaced it with DEX COOL when I put the thermostat in this weekend.


So, what'* the official word here?
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