rpm's stay high till stop?

[331 stang91]

I'f im costing up to a stop light in neutral the rpm's stay a about 1200 till I come to a complete stop. Anyone know why?

 

[super302]

clean MAF, TB and IAC with throttle body cleaner ($3 at autozone)

good luck

 

[super302]

also, check vacuum leaks

 

[HISSIN50]

The VSS and puter keep your rolling idle high like that - it is normal.

 

[super302]

The VSS and puter keep your rolling idle high like that - it is normal.

i didn't even read his post, i just glanced at the title

he's right, the idle will stay slightly higher than normal until you stop

 

[HISSIN50]

i didn't even read his post, i just glanced at the title

he's right, the idle will stay slightly higher than normal until you stop

You are doing better than me - I can't read so I just guess.

 

[super302]

You are doing better than me - I can't read so I just guess.

 

[Stangtamer]

its normal...try cleaning it

 

[HISSIN50]

its normal...try cleaning it

That is kind of contradictory, no?

 

[Allforspeed]

totally normal bro, my car's sensors are immaculate and in perfect tune and it does this,

 

[331 stang91]

I'm glad some of you decided to come in otherwise I would be cleaning
everything like the first few post said. Thanks thought eveytone I thought it was ok but thought I would ask at least some of you got a good laugh at my expense

 

[Michael Yount]

The ecu is programmed to do it - my wife's Bimmer does the same thing - idle speed is about 600 rpm; but it will hold at 900 rpm until you come to a stop, then it drops down.