An03s

I have a turbo s2000 with id1000 injectors and b$m fpr. The battery on my car was dead yesterday and hooked the jump box to it, it started fine and then disconnected the battery box and about 30 seconds later but ran fine before so. I jumped in and started it again without the jump box and the car ran really rough. I changed the battery out cause sometimes a bad battery makes cars do some weird stuff. With a new battery in I started the car again and still runs rough. I glanced at the fpg cause my wideband was showing 11's like it was full throttle and my gauge read between 85-95psi. I think that seems way to high. I'm not sure what the psi was when we tuned the car because I didn't have a gauge (I know horrible idea but it was a last minute decision to add the fpr and didn't have time to tap for a gauge). Does anyone have any idea what fuel pressure I should be around? I'm running e85 on 12psi and power is 466hp and 295tq

yamahaSHO

Standard fuel pressure without vacuum (or boost) is 43.5 PSI. Check your reference line to the FPR and if it's okay, you may need to readjust your pressure via the FPR.

With ID1000's and 466whp, I couldn't say for sure if the tuner left it at 43.5 PSI base pressure or bumped it up.

An03s

Thanks I will check that out tomorrow when I'm back at the car. When tuning we did adjust it two turns but didn't want to adjust it any more just because of not knowing what the pressure would be at.

yamahaSHO

You should NEVER make a fuel pressure adjustment without a gauge. There's no telling if it was at 43.5 PSI from the factory.