So its time to revisit this issue. It has gotten worse and the truck is a mother****er to start prety much every time now. The 7.4L Vortec originally came with Rochester injectors (p/n 17109596) that are A) a ****ty design and B) at the absolute max end of their operating range. I am going to replace my bunk injectors with Bosch units (p/n 0280150973). I have read mixed reviews in this thread
http://www.fullsizechevy.com/forum/g...ec-owners.html
about whether a tune will be needed with the new injectors so I might have to hit up Creighton's EFI live. Do I have to buy a subscription or something? I will need to get the EGR and rear O2 sensors programmed out regardless.
I am going to do *something* with the exhaust too. As far as I know there are no complete kits available for crewcabs of this body style. I dont want to buy headers and I'm ditching the cats. I think I'm going to use the crossover pipe from my stock exhaust and just run new tube the rest of the way. Not sure what muffler I'm gonna run yet.