Originally Posted by kmbkk (Post 1640654)

Guys,

I've had this problem for almost a year and it's really starting to frustrate me. It happens occasionally, not all the time, either after I've been driving for a while and get into stop and go traffic or after I've been driving for a while and make a couple of quick stops. The car will stumble, die, then I'll get the P087 (low fuel rail pressure) code. If I clear it and start moving again, it'll be ok for a few minutes, but if I stop again it reoccurs. If I clear it and wait a minute the car will do the same thing and I have to let it cool down some.

If anybody has any insight, or has experience wih this problem I'd really appreciate your assistance!

Kelly

Originally Posted by kmbkk (Post 1640654)

Guys,

I've had this problem for almost a year and it's really starting to frustrate me. It happens occasionally, not all the time, either after I've been driving for a while and get into stop and go traffic or after I've been driving for a while and make a couple of quick stops. The car will stumble, die, then I'll get the P087 (low fuel rail pressure) code. If I clear it and start moving again, it'll be ok for a few minutes, but if I stop again it reoccurs. If I clear it and wait a minute the car will do the same thing and I have to let it cool down some.

If anybody has any insight, or has experience wih this problem I'd really appreciate your assistance!

Kelly

Originally Posted by stugray (Post 1640705)

Based on some of the comments in the "Blown BRZ motor" thread, low fuel pressure can be very bad.

I would get that fixed before some "non-linear catastrophic structural exasperation" occurs. (aka - BOOM)

Originally Posted by kmbkk (Post 1640927)

Thanks for the quick responses guys! To answer your questions:

-I haven't been able to log it as it's intermittent, and usually occurs when I'm driving home from work.

-I'm not on the old tune, thankfully. I'm using a base tune by @jamesm. I'm already in communication with him about this.

A little more info on my car:

-265 LPH Treadstone fuel pump.
-stock injectors
-running ~10-12 psi boost, but definitely babying the car until we dial in the tune.

Originally Posted by Sportsguy83 (Post 1640933)

I would first and foremost look at in tank fuel pump install.

Originally Posted by xjohnx (Post 1640940)

Agreed. It should be apparent in the logs, even if it's not actively presenting itself in a perceivable manner. When my fuel pump was initially installed incorrectly, @DeliciousTuning was able to see the fuel rail pressure falling off at higher RPM's (even though the car wasn't acting funny at that particular moment).

Originally Posted by kmbkk (Post 1640954)

Got it, thanks!

Originally Posted by xjohnx (Post 1640967)

I found the log from when I was having a similar issue. I don't have ProECU handy on this PC, but i tossed it into excel so you could see the rail fuel pressure vs RPM from my issue and compare with your logs to see if you notice anything similar.

http://i.imgur.com/oTYR6di.png

Originally Posted by kmbkk (Post 1641642)

Here's a log from a few weeks ago: