marcus12

Car won't go over 4100RPM in any gear, including Neutral...HELP!
Feels like the fuel is being cut or something...Fuel pump, injectors, MAF? Anyone?

RB5_245

got any more info?? MY? Mods? noises?

submannz

Probably overboost fuel cut

MelTypeR

iTrader: (4)

Is your Check engine light on?

What model\year is the car?

Sounds like your car is in limp home mode.

Pavlo

Submannz,

Overboost fuel cut in neutral? i don't think so

If it's an ECU cut of some sort it will bob up and down, like cut out at 4100 come back in at 3900 or something, you will hear this.

if it's a problem like ignition, it's more likely to just falter on a fixed RPM.

Paul

MikeWood

Probably due to no road speed input.

Mike

Pete Croney

If the car is stationary the speed signal shouldn't affect things and you should be able to rev it freely.

I would get someone with a diagnostic unit to have a look at it.

marcus12

95 Impreza L AWD Coupe. Former owner pulled the original 1.8Litre US engine and put in a 2.2L - non turbo US engine.
I think that's the root of my problem...ECU? Why would it cut the fuel? I'll take it for a diagnostic, thanks.
No check engine yet...but I'll check the wiring because with this sort of thing, I'm sure it SHOULD be on...
cheers

David_Wallis

Earth fault??

Check for fault codes..

Fuel Filter..

David

Scoobie Snacks

MAFS, I had that happen on my U.S. 240sx due to the mass air flow sensor. It would not rev over about 4k rpms in any gear.

Sheepsplitter

It's gone into limp home mode.
Most likely MAF or Lambda sensor fault.
Get it on a diag box.