new engine issue- fuel cut ?

[elitee]

Hi,

Just replaced the engine in my NB8a everything is fine expect when driving, it wont rev past 3-4k rpm in any gear, seems like there is a fuel cut happening.

Could this be due to timing or air fuel ratio running to rich ?

Is there anything i can check.

thanks,

Robert

[93_Clubman]

Are you certain the plug leads are good?

If so, is the replacement motor out of an NB8A, i.e. 1998-2000 with BP4W cast on back of head? NB8A uses an intake manifold which incorporates VICS.

Btw, what engine management are you using, i.e. OEM ECU or aftermarket?

[elitee]

Are you certain the plug leads are good?

If so, is the replacement motor out of an NB8A, i.e. 1998-2000 with BP4W cast on back of head? NB8A uses an intake manifold which incorporates VICS.

Btw, what engine management are you using, i.e. OEM ECU or aftermarket?

Im not to sure about the plug leads, do have new ones here may need to put them on and see how they go.

Yes its a 1999 bp4w, i am running a OEM ecu

[93_Clubman]

Are you certain the plug leads are good?

If so, is the replacement motor out of an NB8A, i.e. 1998-2000 with BP4W cast on back of head? NB8A uses an intake manifold which incorporates VICS.

Btw, what engine management are you using, i.e. OEM ECU or aftermarket?

Im not to sure about the plug leads, do have new ones here may need to put them on and see how they go.

Yes its a 1999 bp4w, i am running a OEM ecu

And it's got the NB8A VICS intake manifold?

[93_Clubman]

The other common NB8A weakness is coilpacks - so also worth confirming these are good.