Technical Overreving at idle

[nrw1950]

Hi,

Just replaced the fuel pump and if I blip the throttle the engine over-revs for about 3 seconds then returns to idle. It is not a sticky throttle cable.


Does anyone have any ideas please?

Thank you

 

[Ralf S.]

Did you only replace the fuel pump, or did you have the airbox off, to expose the inlet manifold?

Revving on suggests either an intake leak or a idle control valve issue. I'm going with an intake leak, especially if you were working in the engine bay on a fuel issue.


Ralf S.

 

[nrw1950]

Did you only replace the fuel pump, or did you have the airbox off, to expose the inlet manifold?

Revving on suggests either an intake leak or a idle control valve issue. I'm going with an intake leak, especially if you were working in the engine bay on a fuel issue.


Ralf S.

Yes, removed the air filter box. How would I check this?

 

[rallycinq]

Yes, removed the air filter box. How would I check this?

Ah...now that makes sense.

Check that all the pipes to the airbox are in the correct places. Is this an SPi or MPi?

D

 

[nrw1950]

Did you only replace the fuel pump, or did you have the airbox off, to expose the inlet manifold?

Revving on suggests either an intake leak or a idle control valve issue. I'm going with an intake leak, especially if you were working in the engine bay on a fuel issue.


Ralf S.

Thanks for that, it was an air leak around the evap valve. Just put some grease on the o-ring and it is fine.

 

[dante giacosa]

nice one, Ralf /Rallycinq...!