PCM flash?
 

What exactly does this flash do for a truck?Ive had missfire while driving when engine is cold for 15 minutes for about a month now.Do you guys think if i have this done it might clear up this problem or maybe something more serious?

Have you plugged a scanner in to see if it's throwing any codes?

well i just scanned it here at work and came up with some codes that werent there last time i scanned it.i have codes p0263,p0284,p0403 though the egr is unplugged,p0528,p0611 anybody have any ideas?

P0263 - Cylinder #1 Contribution/Balance - Probable Causes: Power cylinder, valve train, or injector
P0284 - Cylinder #8 Contribution/Balance - Probable Causes: Power cylinder, valve train, or injector
P0403 - Exhaust Gas Recirculation Control Circuit - Probable Causes: Open circuit, short to ground or voltage, EGR valve
P0528 - Fan Speed Sensor Circuit No Signal - Probable Causes: Mechanical fault, short to voltage, open circuit, short to ground
P0611 - Fuel Injector Control Module Performance - Probable Causes: Internal FICM error


I'd try to clear the codes and see which ones pop back up then work from there. What year is your truck and how many miles?

If injectors 1 and 8 are failing it could be why you are feeling the misfire as the fire order is 1-2-7-3-4-5-6-8 so 1 would fire right after 8.

yeah i cleared them i was just reading on alldata a service bulletin that directly talks about code p0611 that is for the pcm flash and it describes every problem ive been having even down to nasty stinch out of the exhaust as of late. should i have my buddy try this flash first? also if he does the latest flash is the heat inductive flash all part of it? thanks alot for the help!