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Rb25Det Fuel Cut

JFK33

By JFK33,
in Engines & Forced Induction

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Plattsy Grand Master

Plattsy

Posted
Posted

it revs past 2500 rpm.. but good chance the replacment was a dud to.

so frustrating

nah mate if it goes past its working... could have dry joints on the solder inside causing it to cut the signal when you hit a bump.

JFK33 Contributor

JFK33

Posted
  • Author
Posted

i just spoke to the old owner and he said the car has a fuel cut defender making the car capable (not safe) of 13.5psi which is what it had goin threw it and it ran fine!

i am thinkin a might have nudged a wire or something when i was changin the exuast gasket... sound like a likely possabilty??

Plattsy Grand Master

Plattsy

Posted
Posted

hmmmmm...

first of all. locate that FCD take it out, rewire the loom back to standard. then kill the fcd with fire.

wind your boost down to under 10 psi after that and see what its like.

give the engine a f**king huge service. fuel filter air filter oil filter upper engine cleaner etc, check your tps voltage clean your iac valve then reset your ecu again.

that should take you about a day working easy with beers. even if none of that is the issue, when you find the issue your engine will run shit loads better.

Plattsy Grand Master

Plattsy

Posted
Posted

okay so its definatly not the fuel cut defender! put the emanage ecu back in and it idles okay but now it sounds like a WRX and still sounds like the air is leaking some where from the left hand side...

soapy water on hoses should sho up leaks.... not to much tho and watch electrical....

do you not have a stock ecu to put in?

if it sounds like a wrk its missfiring... check coil packs and harness.

i never said the FCD was causing your problems but it willllll. throw it or sell it. you wont need one after you have the emanage tuned.

JFK33 Contributor

JFK33

Posted
  • Author
Posted

haha f**k this man, so now its missfiring and not boosting properly...

ive checked and checked for leaks i was thinking maybe theres a crack in the intercooler??

The ecu is stock witha piggy back e-manage.

it seems to be holding idle now and doesnt want to stall when you come to a stop.

would it be throwing out error codes??

Plattsy Grand Master

Plattsy

Posted
Posted

all the issues i had with mine it never threw a code......

unplug your piggy back, run on standard ecu, reset it. dial boost to just under 10. put 98 octane fuel in. see how it runs. get it right on stock parts then add one upgrade at a time to see what is causing the issue. if you put it back to stock and its still doing it, then you know its not those parts and you can figure out what its doing.

also if that emanage has a tune loaded on it and you dont have the right mods etc you could do some serious damage!

JFK33 Contributor

JFK33

Posted
  • Author
Posted

its been tuned with the emanage capable of 13.5 psi, But yeah this will be the third time ive strated from scracth

i guess that what ya get when ya buy someone els car ( no knowing exactly what hasn been done or any problems its had)

I said to this missus last night i was ganna sell it and get a 4 banga haha :verymad:

simpletool Mentor

simpletool

Posted
Posted

Was about to say check the pipe between the AFM and turbo inlet - also check the plumbing of the BOV return pipe that joins before the turbo.

BTW - don't take advice from random people about turbo cars. SAU is the best source of info for for RB engines.

  • 1 month later...
Odium Grand Master

Odium

Posted
Posted

My only question after reading this is....

Why the hell would you run 18psi when you've got an emanage which is tuned for 13.5psi... That's just asking your engine to lean out and destroy itself! Especially for a track day when you're going to be Wide Open Throttle all the time...

simpletool Mentor

simpletool

Posted
Posted

Yeah, normally people turn the boost DOWN for a track day. You don't need the power on the track, it's better to have moderate power and concentrate on being smooth and taking good lines. An extra 20-30hp at the wheels isn't going to make a huge difference if you are a nooby.

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