RPMs drop right after cold start

[T4Rscott]

Hi all,

My 99s RPMs drop right after start-up. This is only when cold. Could this be a sign of a failing fuel pump ?

Thanks

 

[Doc2012]

From my experience, this has to do with the engine warming up, and entering closed loop operation.

The higher RPMs help the engine heat up, and once it has entered "closed loop", the fuel supply is altered, and the engine runs normally.

 

[T4Rscott]

So is this a problem? What should I look at?

 

[T4R2014]

Mine drops RPM's as it warms up. It always has.