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Discussion Starter · #1 ·
O.K., now my caR is bone stock save for the Elevate exhaust. I was happy with the performance before today. Changed the oil after Seafoaming the engine & added some Seafoam to the gas tank yesterday. Going to do the vacuum system tomorrow. Oh... and I bought a new oil filler cap (see my thread from yesterday :D )

Anyways, the engine seemed to run a lot smoother & quieter after the Seafoam & Rotella T6. I was quite happy with the results. Then I changed the spark plugs today. HOLY CRAP! The hesitation between 3rd & 4th is gone. The throttle response is crisp. It's like a new car! The plugs I took out had quite a bit of corrosion on them. The electrodes & ground strap were pretty white. I installed NGK Irridium IV's. What a difference. I know it isn't the NGK's per say, but the old plugs obviously needed replacing.
 

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Discussion Starter · #3 ·
103,660
 

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Change your fuel filter too. It will run better and get better mpgs
 

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Discussion Starter · #7 ·
Will do. I have a fuel filter ready to go.. just need to get up under there & change it out. I need to Seafoam the Tahoe.
 
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