03 6.0 Hesitant when cold with vibration

**joseyaaron** · #1 (**permalink**) 08-11-2010, 05:47 PM

2003 6.0 4x4 CC banks 6 gun w/ IQ 4" DP " straight pipe K+N intake ARP studs, EGR delete, etc...
When cold and taking off, truck stumbles and is hesitiand under load/full throttle. Also has a thumping/vibration and you can hear the sputter in the exhaust. It only does this for the first 5-10 minutes. Could it be that I need an intake elbow due to lack of air going into the motor???

getgrimey · #2 (**permalink**) 11-07-2010, 07:40 PM

sounds like bad injectors.

**Galaxie** · #3 (**permalink**) 11-11-2010, 06:11 PM

Does sound like injector or a FICM issue. How many miles? Any smoke?

***diablos30*** · #4 (**permalink**) 11-12-2010, 04:20 AM

could just be some stiction too, try running a lighter weight oil and put a couple bottles of revX in it.

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