Ehughes

OK, I am a searching fool. But other than cold weather, I can't figure this out...

1.06 boost (peak hold #) at 82% inj. duty on stock injectors and turbos, no fuel cut! I have the PFC w/commander, PFS intercooler, PFS airbox, downpipe and catback. The max boost setting was .9 (I think...the larger of the two base max boost settings)

Does this sound right? BTW, it was about 38 deg. outside.

atihun

If you've set it at .9, your fuel cut will occur at 1.15; so you were close. Fuel cut is set to be .25 above what you've set your max boost setting.

Ehughes

I thought is was .025 over?? Isn't .25 like 3.5 psi?

Tim Benton

iTrader: (1)

It's .25 over what you set it for, so yes, you're trying to hit 13.23 with a .9 setting. Fuel cut will happen at 16.9 psi roughly. As far as your injectors only hitting 82%, wat mods have you done to the car since that a pretty low number for a 1.06 boost number. Do you have larger secondary injectors?

Tim Benton

Ehughes

Sorry, my bad. Manual says 0.25 over. That seems like a large margin for error....Bye Bye motor!

Ehughes

AlamoRotary in San Antonio rebuilt the motor 2k miles ago, b4 I bought it. He "says" the only mod was apex seals, but the original owner (b4 me) had PF work on it when he was in Virginia. So all i know is PFC w/commander, PFS intercooler, PFS airbox, downpipe and catback. It appears to have the stock main Cat (the perforated sheild is in place). But it may be piped through or hollowed. The car failed emmissions b4 (carfax), but who knows.

Any easy way to check the injectors? Like anything is easy on a rex!

ech

failed injectors wouldn't cause lower than expected inj duty cucle. If anything, it would show higher than expected cycles, under light cruising when using the 02 sensor to determine the AF mix (that's "closed loop" right, I always get that confused).