switch to smaller injectors. bad idea?
 

well my damn car seems to do nothing but flood flood flood. the only way to make it start is oil in the plug holes. very irritating.
now i was wondering if i could switch the 550cc injectors to the 460cc ones that were on my n/a. bad idea? unless anyone else has any ideas?
really at the end of my wits with this car.
btw its a s5 motor with all s4 internals and electronics. fresh "rebuild" no emissions and open exhaust and intake.

Switching the injectors may help the issue if the other injectors a clean, but swapping to smaller injectors is just a bad idea in general. The ECU is not tuned for smaller injectors and you may lean out your engine. Just take all your injectors out and have them professionally cleaned and flowed, will only take a few days to get them back in the car and your issue will be solved. That will be your best bet and will only run around $100. That way you won't have to worry about blowing your engine.

damn. alright. guess i know what im doing in the morning..,,.
also randomly when attempting to start the car if i leave the ignition in the "ON" position without the motor on the "ADD COOLANT" light comes on along with the buzzer. any ideas why?

Low coolant?? Bad coolant level switch or wires?

no thats the thing its not low on coolant. and when iactually get the mnotor to run it will stay on for lets say oh 2-3 minutes then just as random as it coming on it turns off. once in a great while it will be accompanied by all the other lights too./ man if it aint one thing its another.

You have air in your cooling system that needs to be bled out. If all the warning lights ever come on, you're having charging issues with your alternator. A slipping belt or loose connection can cause this.

And no, you should not use 460cc injectors with a turbo ECU. You have a freshly rebuilt engine, which is going to need some breaking in. Confirm you have good compression while you're at it.

why are we even assuming he has a turbo ecu?

If you have a standalone ecu the best option is to use the smallest injectors that you can and still have enough fuel for your power needs. If you have a stock ecu then you should stick to stock injectors. My personal opinion is that if you have the ecu control and you are running a turbo that you should use n/a sized injectors and then run 60 psi or so of fuel pressure. N/a would need smaller than stock injectors. That is a topic for another thread though.

The first thing you should do is identify why you are having flooding in the first place. Is this still n/a but using turbo injectors? Can you tune it at all? Do you have a leaking fuel injector? This is fairly common on older injectors.

A bit more detail would help.

well im running just the stock ecu. i think n332. it is a turbo motor running turbo injectors. um idk why it is flooding. i think it might have something to do with the injectors most likely needing a cleaning. but also there may be an issue with the water thermo sensor. and also i've done a compression test and the numbers were all good. although i cant remember the exact number atm