Stevey629

just about through the break in period for my streetported motor, stock rebuilt twins and a PFC. After a long headache trying to get the motor to run and even idle fine, the PFC cleared up a lot of the problems. However, after letting it sit but not cool down completely a.k.a somewhere around 30-40 mins, I try to start it, and it fires up, pulls up to around 1500, then drops out like a rock. It happened today, and has been on warm start ups, and I tried it again, and it gave me a gunfire type pop from the exhaust and I had to stay on the gas to keep it idling. After driving for no more than 5 minutes, it idles like a charm afterwards. what could be causing this on a brand new engine with apparently good compression? Oh, and I wish I had a boost gauge, commander or something because it feels like the second turbo is barely (if at all) boosting, because I feel a very small amount of pull, and hear no spool, blow off (have it vented) and it just feels sluggish from 3500 all the way up to 6. I don't push it past that just for sake of still breaking the motor in and going easy on it because I feel like something isn't right here.

dubulup

hot start problem...maybe FPR solenoid is bad???

Mahjik

iTrader: (1)

https://www.rx7club.com/showthread.p...r+AND+solenoid

Stevey629

so, without this solenoid the car will be seeing a constant amount of fuel, regardless of vacuum? Is my stalling out due to a temporary lean situation? Based on that explaination of the FPR, I am still a bit unclear as to how it works. Sorry, Im not real good with the fuel system and its delivery gremlins and tricks, I haven't been doing my homework with it. I gotta learn more about it.

HeatTreated

hrmm, sounds alot like this thread.

https://www.rx7club.com/showthread.p...51#post3165951