i dynod my car while on dyno everything was fine i did 304 on a mustang dyno ..when i left as i accelerate throght the rpm more so 3rd gear then anything the car sputters like it forcing its way through the rpm....sometimes it does it sometimes it doesnt....but it goes slow...by the way i not running a dumptube on the waste gate and im running chrome program any help would be great thanks

 

Are there any cel's?

 

no

 

your intake is sucking in low oxygen hot exhaust gasses and detonating??? what do your spark plugs look like? also is it cold outside but was warm in the dyno?

 

tuned on a very cold day and now its warm..but still when i left the dyno it was doing it

 

when was the last time the injectors were cleaned and flowed ? this is something that should not be overlooked.

 

they were new injectors