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08-08-2012, 02:10 PM
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Junior Member
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2002 Chevy TrailBlazer LT EXT
Summit White 4.2L I6 2WD
Join Date: Dec 2009
Location: mesa, arizona
Posts: 2
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P1514 and pending P0300
Hi I'm new to this thread and I have a 02 trailblazer.recently i replaced the sparkplugs and now im getting a p1514 and a pending code p0300 i checked and cleand the throttle body and did not find any problems. I started my TB and it ran fine at idle but until i took it out engine light came on and reduce engine power and now it idles rough.any ideas on what to look for.
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08-08-2012, 03:32 PM
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Junior Member
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2002 Chevy TrailBlazer LT EXT
Summit White 4.2L I6 2WD
Join Date: Dec 2009
Location: mesa, arizona
Posts: 2
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dtc p1514 and pending p0300 cont.
Ijust checked for any vacum leaks and no leaks were found.I just had the trailblazer running for a while and took it out to drive but has no power feels like it wants to die.rpms fluctuates between 5 and 6.
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08-08-2012, 09:31 PM
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TrailVoy Alumni
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2002 Chevy TrailBlazer LTZ
Red Jewel Tintcoat 4.2L I6 4X4
Join Date: May 2007
Location: Orange County, New York
Posts: 3,245
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You removed the throttle body from the engine, cleaned BOTH sides, and had the battery disconnected for at least 35-40 minutes while doing the cleaning?
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Always remember: wherever you go, there you are! 
PCM4less,HID,DRL killer,cabin air filter,Mobil 1,K&N,LED's,193K+,
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08-25-2012, 08:06 AM
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No longer with us
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2002 Chevy TrailBlazer LT
Sand Beige Metallic 4.2L I6 4X4
Join Date: Oct 2009
Location: Shirley, NY
Posts: 55
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did you check the spacing on the spark plugs. if the spacing is off it can cause that, it happened to me.
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2002 Chevrolet Trailblazer LT: 8000K HIDs, K&N CAI, DRL delete, Viper 5901, Cherry Bomb Custom Exhaust, Pioneer HU
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08-25-2012, 02:33 PM
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TrailVoy Alumni
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2002 Chevy TrailBlazer LTZ
Red Jewel Tintcoat 4.2L I6 4X4
Join Date: May 2007
Location: Orange County, New York
Posts: 3,245
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Quote:
Originally Posted by gcacace1289
did you check the spacing on the spark plugs. if the spacing is off it can cause that, it happened to me.
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Huh??? 
OP hasn't responded to any questions/suggestions, but it says "solved" on the thread title. Real nice when posters come here looking for help, get help, fix their problem, but offer no thanks for it. 
__________________
Always remember: wherever you go, there you are!
PCM4less,HID,DRL killer,cabin air filter,Mobil 1,K&N,LED's,193K+,
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12-11-2012, 07:46 PM
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Junior Member
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2005 Chevy TrailBlazer LT
Black 4.2L I6 4X4
Join Date: Sep 2010
Location: Skokie, IL
Posts: 11
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Po306
I was wondering if anyone has new information regarding PO306, my MIL is constantly on now. In the past it would show up occasionally, perhaps once every couple of months. These are the things that I did, swapped coils, put in the AC Delco Iridium 41-103 spark plugs, new air filter, removed the throttle body and cleaned it on both sides and pulled the two PCM fuses and waited 30 minutes. At that time which was a few months ago everything was fine. Other than the code the TB has a slightly rough idle, but has great power for a vehicle with 174,000 mi.
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Jake1
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