I am having a hard time getting my 406 TPI not to run rich. I have Trick Flow 23* heads,24lb Injectors,Timing set at 10* BTC,fuel pressure at 45 and a custom Ed Wright chip.I was wondering if too cold of a plug would cause a rich condition? I have ACFR3LS plugs now because that is what Trick Flow recommend's for a starting point. I get what I think are normanl reading with my AutoXray but This thing runs way to rich

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85 TA 406 TPI
Which I will never get to run right

 

I cant say for sure if that is the problem but on average cooler plugs do run richer.



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1990 TA 350 TPI
SPORTSMAN II HEADS
COMP CAMS 224-230@.50
52MM THROTTLE BODY
24LB INJECTORS