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Discussion Starter · #1 ·
I have a buddy with a 03 Mach 1 mustang with a built motor, He has a SCT but his car does not idle good when it warms up, I let him use my wideband and when he starts his car when it is cold it runs 13.5 then as it warms up it goes all the way to 18 -19 at idle and wants to die. At wot it runs 12.5. His tuner says that it is normal. What you all think?
 
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