CHRIS575

HI ALL I HAVE A VERY ANOYING PROB WITH MY STI WHEN CAR IS WARM AND GIVE IT SOME THROTTLE WHEN SHE REACHES 4000RPM IT CUTS OUT OR HOLDS BACK AS SOON AS YOU TAKE YOUR FOOT OFF THROTTLE SLIGHTLY SHE PICKS UP AGAIN IT DOES IT AS IF THERES A LIMITER BUT IF SHE CLEARS IT ABSOLUTLY FLYS ANY IDEAS!!!!!!!!!!!!

scooby L

Boost spiking?

Pre Det (get a knocklink)

What fuel are you running it on

Coffin Dodger

Your keyboard appears to be broken too

StickyMicky

coil packs ?

RRH

That'd be my first port of call

PeeVee

iTrader: (1)

You say that she is cutting out "or" holding back, it would be nice to know which one it is as this makes a difference as to what's wrong with the engine & the list of which parts could be causing the fault.

Is she "physically" cutting out, i.e. is it like someone switching the Ign key off and then back on again, or is it holding back, i.e. the engine is running and pulling the car along, but is hesitant and wont rev cleanly/misfiring.

Oh, by the way.......






















THE CAPS LOCK THING IS REALLY ANNOYING

Phil

scooby1doo1

iTrader: (7)

I DONT NO MATE.

dj219957

Coil packs or overboost. If its just hesitatant then coil packs. If it violently cuts out then overboost.

What have you done to it to get 360bhp? Is the boost controlled with a aftermarket boost controller or has it been tweeked with a new map?

New_scooby_04

iTrader: (4)

Welcome to SN!



Drive the car off boost pending a diagnostic test, lest it's a fueling issue.

Ns04

big jim

had the same wiv my uk turbo,changed the plugs n leads 1st no change so changed the mafs n its flyin again now

Alan MaC

Is your Up Pipe Decatted??



Regards


Alan MaC

Jolly Green Monster

iTrader: (4)

year 2000.. therefore as I think you have found.. MAF sensor..

buy a spare and at each service reset the ecu.. if it drives different / idle hunts etc etc then replace.

Simon

CHRIS575

sorry about caps lock not used to this
it is like someone turning the ignition key off then on then if i put my foot right down she splutters while increasing speed until she clears then its ok the ecu has been chipped she has had full exhaust conversion inc headers front mount intercooler and oil cooler induction kit lightened flywheel and pulleys plus others ?

GC8

If it's a 'brick wall', then I'd suspect fuel cut. I'm not a big fan of them, but do you have a boost gauge and if so, what's it reading when the engine cuts?

CHRIS575

gauge is in psi im sure gauge hits around 5 mark on gauge but it only seems to do it when load on engine it did it today i put my foot right down it was still pulling but spluttery then it cleared and been fine since.

amego

hi criss seen you floating around haverfordwest id go for the maf try m@s enginering ask martin if hes got a good maf lying around

Jolly Green Monster

iTrader: (4)

is you speedo working?

if there isa no speed input the ecu cuts the power at 4500rpm

StickyMicky

i thought it was a 1994

ScooByer Trade

I had a 1995 Sti 555 4 door a while ago, with what sounds like the same problem and it was down to the coils.Ran as silky as a flat 4 can after replacment.Also a full straight through HKS exhaust was fitted to it without a remap and that didn't affect the running after the new coils were fitted.

Nathan.

dj219957

"year 2000.. therefore as I think you have found.. MAF sensor.."

he has a 94


i thought the maf on the 94 model was robust

ScooByer Trade

Apparently because the two coils are at the rear of the engine, they don't get enough air and so deteriorate due to the heat.I don't know how true that is.

B4D HK

iTrader: (15)

FUEL CUT !