then it will start fine for half a day or so then it gets hard to start, then i disconnect the battery for a bit and its starts right up happens at any temp as i have tried the combinations doing it cold hot etc seems like reseting the ECU is the "fix"

the hard starting has been going on for a few weeks i have been troubling shooting i have replaced the CTS, Crank sensor (pos), ignition switch, when back to the stock air box, fuel pressure is correct, no codes but i didnt check for ghost codes

any thoughts on why it will start okay on a ECU reset but not when its been running for a while

 

Everything you described is a grounding problem. Does it push start fine?

 

i would grab a spare ECU from the JY. Seems like thats the issues especially if u keep havin to reset.

Def check grounds too

 

Def sounds like a ground, clean the old grounds up if you want add a grounding kit. Process of elimnation

 

yea i had a ground straight from the starter bolt to the neg, (so i ruled it that out) but i swapped it out away with a 4 gauge one and it started right up seems fixed for now thanks guys