boostracingfd

need help becuase springs just around the corner and got to get her good enough to get tunned!

basically the car starts and idles fine but at about 2k , as soon as i rev it it just wants to die. if i let of it idles but if i continue to rev it it cuts out.
I have 550cc pri and 1600 cc sec w/ resistors and with all the fuel mods to support it. i have my fuel pres set at 30psi and when it starts it jumps to 40 and i cant turn it down or up.( even with the vacuum line off).

Also the motor was just rebuilt with a street port ( JR rotary) and i have gt35r turbo. i did all the blockoffs and havthe apexi power fc but no datalogit yet.

cant figure out whats causing this have searched and found no good answer. I have also tried the stock ecu and it does the same.

Any hel[p would be great!

boostracingfd

could i get some help please

TwinTurbo93

How long ago you had the tune-up done, spark plugs or wires can cause the cut offs, also a bad ignition coil may cause it.

Sounds like your fuel pressure regulator is instaled backwards, inlet and outlet may be reversed since you can't adjust the pressure.

boostracingfd

all the wires and plugs are new but the two coils do get really hot after only a short time running, could that be the problem?

impactwrench

I agree. I installed mine backwards,(reg came without instructions) and it ran the same as described. Also replaced primary coil this summer. The only time it affected the way it ran was under high boost levels

TwinTurbo93

I think the only way to check the coils is to install new ones, not sure though...

impactwrench

No. coils can be checked for resistance. It is documented in the OEM service manual. I can't seem to find mine but you can find them at iluvmyrx7.com, free of charge.

WolfpackFD3S

A while ago my car wouldn't start, traced the problem to one of the coils. Did the resistance test and it passed but it was definitely dead, no spark and the plugs and wires were new. Replaced it and the car started up, so the resistance test can't always tell you the state of your coils.

-Rob

TwinTurbo93

Ohh cool, I have the freaking service manual but I never got to that section, I guess I don't like books alot, never did

Thanks for the info.

TwinTurbo93

Hmmm, I guess after all the resistance test doesn't do sh*t ...

boostracingfd

ya did the resitence test with the ohm meter and there fine, ill try the fpr its possible i might have switched the lines. im only runnin the stock maps on the power fc do any of u guys have it and if so do u think that may be the root of the problem

BoOsTin FD

I had a similar problem. It ended up being fuel pump relay. I accidentely removed it without disconnecting the battery, but then when i put it back i couldn't rev past 2k or so, it would just backfire and die. I rested the ecu and everythign was fine.

Amel

Mahjik

iTrader: (1)

Ok, you are running the base map for the PFC?

I'm assuming the base map is expecting 850cc secondaries (in which case you are running 1600cc) as would be the case with the stock ECU. You are dumping in a TON more fuel than what it's expecting. Did you at least change the injector settings to 1500cc (since you need the Datalogit to go beyond that)?

boostracingfd

ya definetly not the fpr lines reversed tried it no good, no press. just a big backfire. switched it back, idles fine but nothin when u rev it stil just dies.

still need help please

boostracingfd

ya changed injector setting up to 1500cc but not sure what else to change on it,
i dont know what the hell it is cuz it starts and idles fine but it wont rev at all i dont get it