After my injector install (FIC 750) i am having intermittant hard starting issues. When it is cold out it is fine, when the car has warmed up for a bit and I go to start it I have to turn the engine over a bit more and it kind of stubbles to start like it is flooding. I have never had an issue with it not starting, but it is kind of annoying sometimes... Any thoughts or suggestions welcome

 

I assume you scaled them correctly?

Check for a leak at the injector seals.
Ensure your fuel rail is not leaking
Look for a vacuum leak at the FPR

OH>>>I tried the 650 setup on my injectors....it was way rich for my setup.

These work great for me.....

Scaling
696

Latencies
3.312
2.04
1.296
1.008
0.744
0.6
0.336

 

Injectors are scaled...
I will check my fuel rail, and FPR tonight...

Also what is strange was the o-rings (manifold side) that came with the injectors seemed a bit loose, and it seemed like the injectors didn't want to seat all the way down into the hole like they were too long and were hitting a seat or something. I put the o-rings from the stock injectors on and all seemed well... Like how there are 2 lips on the injector, the o-rings that came with them went over the top lip, and the OEM o-rings only fit over the bottom lip...

 

I prefer the stock O-rings if they are not too worn.

Also, make sure you change your IPW startup tables. That may or may not be your biggest issue as my car started great on 93 octane with the stock values... but starts even better with them updated. If it feels like flooding this may help because with bigger injectors you will be injecting more fuel with the stock values.

 

For me, nothing worked untill I changed IPWs related to battery voltages.
you have to try shorter IPW on lower voltages. when you log the start you will notice the voltage before start never goes over 10V sometimes it even drops to 1.25v.

PS: 750 is easy. wait till 1050 like mine.