just got my new 408 in and tryed to take it for a spin when it started missing real and breaking up real bad but if it was at 3000 rpm it was fine well i cleaned my o2 sensors and it went away now i think its over heating it says 210 but it is steaming and boiling dont know what is going on car onley has 2300 miles on it 408 is brand new with maybe 5 miles and fans are not coming on maybe i should change to 160 please help

 

If the fans aren't coming on, there's part of your problem.

See why the fans aren't coming on that's a problem (bad fans ? wiring/grounds ? relay ?).

Are they the stock fans ?

Is the cooling system building/holding pressure ?

Do you have access to tuning software/scan tools ? It's definately gonna need some tuning...

Rob (Bad30th)

 

i have a texas speed tune

 

they are stock fans

 

i would make sure the fans are working and see if there is air in your cooling system as well.

 

my fans work fine yes they are stock