paintshopgaz

HI, had my 94 wrx in bits for a while now,had fitted:

Autobahn 88 front mount,
K&N typhoon,
Turbo up pipe,
440 injectors ,
Apexi Power Fc

Struck the car up for the first time today and within 2 minutes of idling found a huge puddle of fuel on the floor next to the tailpipe and when revved a cloud of white smoke!

Is this simply a mapping issue as i havent yet had the power fc setup for my car although it was fitted to a car with very similar mods. Or do i have major problems??

lunaticlegacy

fuel shouldn't be bypassing combustion like that? was it running ok when you had it switched on?

Slowboy Racing

If you have neat fuel on the floor it’s a leak and nothing else.

The Rig

iTrader: (13)

wouldnt of thought any amount of "mod" would cause neat fuel to get into the exhaust system,surprised it was running with neat fuel poring into the bores/out the exhaust ports

Turbotits

iTrader: (2)

i would guess its water mixed with a bit of exhaust gas. Normal this time of year particularly if youve done some work on it. there will be condensation everywhere

paintshopgaz

Car seemed to be running ok idle was just a bit all over, revved nice and smooth and everything seemed to be ok apart from the fuel coming out of the exhaust and the white smoke.

Fuel pressure reg is set at 3 bar??

When i bought the apexi power fc the unit was second hand and was previously mapped at andy forrest. The previous owner had near identical mods to me but ran 440 injectors, so i bought a second hand set.

My problems have only happened when ive fitted them along with the power fc.
just tried re fitting the old 380s and i have no problems except for idle.

Could the injectors be faulty?

Turbotits

iTrader: (2)

If youve got white smoke it would sugguest its burning/heating water. how long did you run it for with the replacment injectors in?when this smoke was coming out?

paintshopgaz

didnt leave it running fore more than a couple of mins due to the fuel smell.

when high revved the white smoke filled my 1000sq feet workshop!!!

Turbotits

iTrader: (2)

i recon at a guess the up-pipe/intercooler were all damp/full of condensation,hence the smoke. I would guess from my experience of fitting exhausts/turbos and the like. They all smoke for at least 15/20mins til everythings nice and hot and has burnt of all the excess oil and water.

I think you should re-fit the injectors and give it a good while to warm up

Slowboy Racing

Plug in your old ecu and see what happens.

paintshopgaz

CAR NOW WONT START IM GUESSING ITS FLOODED!!

IF THE LAD I BOUGHT THE ECU OFF DIDNT HAVE IT MAPPED FOR 440S AND INSTEAD HAD IT SET FOR THE STANDARD 380S WOULD THIS CAUSE THE EXTREME OVER FUELLING IM SEEING??

LEUVEN

I fitted 550cc injectors, FMIC, new up-pipe and FPR along with a Power FC and the car idled fine and ran fine by driving very sensibly (not using much throttle and allmost no boost at all).
I did very few miles inbetween fitting the parts and getting it mapped too.

Going 4 400bhp

iTrader: (2)

Put a spark plug on it and Flam away

StickyMicky

check the O rings....

Hol

iTrader: (1)

Your fuel pressure regulator (assuming it is a new aftermrket one??) is possibly plumbed in the wrong way around and you would be feeding the injectors with the full unregulated force of the pump pressure.

Jolly Green Monster

iTrader: (4)

as has been suggested either an Oring on an injector or more than one is leaking into the bore.. careful not to hydrolic lock the engine.. remove spark plugs and spin over (disconnect coil packs!) and see if you get a fountain of fuel out with injector plugs off.. ie. there should be no fuel.
Or the fuel pressure reg is fitted the wrong way around.. also suggested already and so the fuel pressure is too high now.