RPM fluctuates

[97GTSTANG]

Whenever i start the car in the morning, the car idles fine around 1100rpm, then after it warms up, it drops down to 850rpm. but after its in the driving temp the RPM drops around 650-700RPM and i also notice the battery meter drops down to R on NORMAL, but when its started in the morning its on M. What do you all think is causing it? Is there a way to raise the RPM up on idle back to 850. What is the factory set at? The TPS sensor wire coating is peeling off, can that be the problem? I have cleaned the MAF and IAC and not much help. any suggestions??

 

[triggz]

Thats normal idle RPM... Your alternator may be going out, or the battery starting to die. Take her to autozone or some place and they'll do a free check on it with their test equipment.

 

[Jones331]

Yea the minor "surging" between 1100rpm and in some cases as low as 500 rpm is normal.As far as the coating coming off I don't see that being a problem either.......jj

 

[four.six]

Whenever i start the car in the morning, the car idles fine around 1100rpm, then after it warms up, it drops down to 850rpm. but after its in the driving temp the RPM drops around 650-700RPM and i also notice the battery meter drops down to R on NORMAL, but when its started in the morning its on M. What do you all think is causing it? Is there a way to raise the RPM up on idle back to 850. What is the factory set at? The TPS sensor wire coating is peeling off, can that be the problem? I have cleaned the MAF and IAC and not much help. any suggestions??

my car does that with the RPMs too and also when i am down shifting to a stop, sometimes my car dies (i look really cool when that happens)..... i have cleaned the IAC. still does it. guess i should buy a new IAC????