so i found it at dyno day this spring. an di have done new plugs and wires, replaced my O2 sensors since it was in time for those as well, fuel filter, pcv. i recently added the ls6 intake and FAST fuel rail san dit lookspimp:. so what should i check next. the hickup happens at about 5300 - 5500 rpm. i am running alot slower at the track time wise and mph wise. about 4mph and .3 slower. could i have a bad coil or injector??? how can i check these componenets my self or is it time to just suck it up and take it to a tuner?? i do have HP tuners if that wil help me with diagnostics. but having this is so damn frustrating

 

You need to do some logging again and see what you got going on No need to start tuning with other issues you will just make a mess.

 

Well, you replaced all the easy things. But like Ellis said.....sometimes you see bad things happen in that rpm rnge from a bad / bent / broken lifter / pushrod / valve spring. But it could "just be" timing or fuel. The logs will tell you a lot. (a/f, KR, misfire etc)

 

okie dokie. so i went out and got some logs done since it was dry for a change. i am not seing anything that says "hey i am jackin ur **** up" so there is no KR, no misfire. the only thing i saw wa sthat my bank 1 injector rate was a lil different than bank 2 side. so now i am fearing that a diassemble is going to be in teh works. how ever i am looking on teh bright sside and thinking.. be a good time to do a cam since stuff in teh valve train could need replacement and that just means time to upgrade. anthing els ei shoudl eb looking for to help with teh diagnostics on this thing

 

any thing from all u goo roos

 

Do you have the files? What all parameters did you log?

Ryan K.

 

ok hopefully i just over looked something. i used the Hp Tuners scanner. so if any one can come up with anything at all it will be apprechiated.