so we are tuning a stock ecu s5 t2 with an fcon. it has all the emissions removed.



we put it on the wideband and you can see it go lean over 5000rpms, ok so we keep turning up the fcon and that just makes it bog harder below 4k but it really didnt change over 5k rpms.



we were thinking fuel pump until paul suggested the fuel pressure solenoid.



check the codes, we get #25, pressure regulator control (fuel pressure solenoid), i plug solenoid into connector



BAM!



10.9:1 afr all the way up to redline, problem fixed



this could easily pop your motor.....

good info

oh yes, THIS DOES NOT TURN ON THE CHECK ENGINE LIGHT

you mean that thing that only effects fuel pressue for 30 secs durring a hot start?......



how is it gona blow my motor https://www.nopistons.com/forums/pub...1047683561.gif

I thought you said you removed emissions? Is this not in the rats nest?

yes if thats not plugged in the ecu doesnt turn on the secondary injectors

um i just plugged the solenoid in electrically, there are no vacuum lines hooked up to it

dude thats scary. We will find out when the LM-1 gets here on my buddies s5 t2...

yeah double check it, i would love to be wrong. granted it did fix this car

well mines been gone for a while....