RPM Not Steady

[DanmMh]

HI, i just bought a 2000 mustang gt manual and i realized that when the car is on the RPM goes up or down, its not steady, and when im on a light and im just waiting for the light to change the RPM goes really down almost to shut down the car, Can somebody help me please ? i thought that with a Fuel injection cleaner was going to stop but it didn't stop.

Thanks for the Help !

 

[Deleted member 38176]

Try cleaning your IAC and MAF

 

[DanmMh]

If i Buy the JLT Performance Cold Air Intake (96-04 GT) do i still have to clean the AIC and MAF ? or that would eliminate that part ?

 

[Deleted member 38176]

If i Buy the JLT Performance Cold Air Intake (96-04 GT) do i still have to clean the AIC and MAF ? or that would eliminate that part ?

A CAI retains the MAF and IAC. They are essential to how your engine runs.

Your local auto parts store carries a simple MAF cleaner. Its just an aerosol solution that you spray your MAF sensor with.

As far as cleaning your IAC, this should help....
Ford Mustang IAC IAB - Solving your idle problems

 

[wmburns]

grasshopper, to answer that question you need to tells us why the RPM's are bouncing.

If for example the root cause is a bad PCV valve, then installing a new TB will not fix the base problem.

If the problem is an upper intake vacuum leak or weak ignition, then a new TB will not fix the problem.

On the other hand, if the base problem is loose or worn throttle butterfly linkage, then a new TB would improve the reported symptom.

Are you just looking for justification to upgrade?

OBTW, +1 on clean the MAF.

check out:
http://www.allfordmustangs.com/forums/2260649-post.html