Neo Motor Cuts Injectors At 2500rmp In Neutral

[fubar]

Heya peeps

Just replaced my blown neo motor in my r32 in installed a second hand long motor in. Now if you stab the throttle it will rev high then cut but if you slowly rev it to 2500rpm it cuts the injectors. i tested the hz to the injector and it dropps of completly at 2500rpm.

There is a few mods to the car so one of these could be the problem but was just wondering if any1 has come across this before and has a quick fix, that would be sic:)

Cheers

Dan

[paulr33]

check basic sensors, check ecu diag

check airflow meter

check boost sensor

check if engine check light is on

[mad082]

doesn't limp mode kick in around 2500rpm? that's often caused by a dodgy air flow meter.

[fubar]

doesn't limp mode kick in around 2500rpm? that's often caused by a dodgy air flow meter.

Yeah that sounds about right but i can stab the gas and it will rev high. How do you test the air flow meter, change it? Its a z32.

The motor had standard intake manifold and injectors, i have now put a front intake plemun, 650cc injectors, fuel rale and regulator and 80mm throttle, so she is over fueling big time atm.

Im just trying to get it driveable to get it to the tuner then the nis tune will go in.

[Adriano]

Are you running big njectors and AFM with the stock ecu?

[fubar]

yeah stock ecu (its an rb20det ecu and loom) but it has some kinda chip on it from japan! and it is running a dodgie safc 1 the old school one with the dials lol

I think it is just running so rich it is going into limp mode. I've dropped the fuel pressure to 2 bar and leaned out the safc but still no luck. I wanted to give it a good run just to make sure everythin is ok like water lines etc before it goes to the tuner

[D_Stirls]

No wonder it's in limp mode you can't just plug the Z32 in and expect it to run.

[lachlanw]

for f**ks sake .

1 should have told us that in first post

2 its not going to go . and if it does it will be through sheer luck and noone will be able to help you from here

[fubar]

it was already running with the z32 afm!! and was perfectly fine all that is different now is the injectors and intake manifold