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| View Poll Results: Spark plugs (choose all that apply) | |||
| replace with stock platinum |
   
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16 | 44.44% |
| replace with iridium |
  
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18 | 50.00% |
| My truck didn't like the new gap |
  
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2 | 5.56% |
| my truck runs better with iridium |
  
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2 | 5.56% |
| Multiple Choice Poll. Voters: 36. You may not vote on this poll | |||
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#16
07-25-2007, 06:39 AM
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Re: 00 5.3L Spark plugs iridium or platinum (poll)
I just changed to the NGK TR55 Iridiums and it seemed to smooth out the idle and accelerate a little bit smoother. Also went with MSD Super Conductor wires...A lot of the truck guys like the NGK's.
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 2003 SILVERADO Z71 ECSB 5.3L - NELSON TUNED - YANK 2600 CONVERTER - DOUG THORLEY TRI-Y HEADERS - SPIN TECH MUFFLER - 224/224 .563/.563 112LSA CAM - TRUE FLOW AIR INTAKE SYSTEM - PORTED THROTTLE BODY - THROTTLE BODY BYPASS - LS1 ELECTRIC FANS - NELSON FAN HARNESS - 160° T-STAT - WALBRO FUEL PUMP - AMSOIL SYNTHETIC OIL - WWW.LS1TRUCK.COM 
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#17
07-25-2007, 07:09 AM
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Re: 00 5.3L Spark plugs iridium or platinum (poll)
Ive seen a few instances where Bosch platinum plugs come apart and messing up properly maintained gm service trucks, resulting in removal of the heads for repair.
Stick with the stock delcos, the center electrode can break free in the boschs and end up messing up the combustion chamber before ending up stuck in a valve 
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#18
09-15-2007, 06:35 PM
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Re: 00 5.3L Spark plugs iridium or platinum (poll)
I purchased a couple of used coils for my 5.3L off of ebay for what I paid it isn't worth shipping back. I checked in my factory manual and GM uses two different style coils for this engine. Will they work for test purposes. I can change the mount slightly.
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