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I have a 99 6spd targa car with a blackwing, corsa touring system,
160 tstat, smooth bellow, MSD wires, air charge temp sensor relocator and recalibration, LS1 edit tune, and TR55 plugs. I have recently changed to plugs from the original to the tr55's. That was about a 2 weeks ago (Easter weekend). My old plugs were a little fuel foulded, now I am getting a slight surge at idle, between 650-725 RPM. I have also picked up a slight backfire through the exhaust on deceleration. I want to ask if this is the start of fuel fouling? I am pulling plugs tomorrow. The weather in texas has been changing alot. Give me a way to head. By the way no codes in the DIC.
 

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I have a 99 6spd targa car with a blackwing, corsa touring system,
160 tstat, smooth bellow, MSD wires, air charge temp sensor relocator and recalibration, LS1 edit tune, and TR55 plugs. I have recently changed to plugs from the original to the tr55's. That was about a 2 weeks ago (Easter weekend). My old plugs were a little fuel foulded, now I am getting a slight surge at idle, between 650-725 RPM. I have also picked up a slight backfire through the exhaust on deceleration. I want to ask if this is the start of fuel fouling? I am pulling plugs tomorrow. The weather in texas has been changing alot. Give me a way to head. By the way no codes in the DIC.
Sounds like you're running a bit rich
 
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