Haven't been around in awhile, and have had my poor little daily driver Mustang parked due to a header replacement I couldn't quite afford. =( Well, I finally shelled out $470 today and had a new header put on the passenger side, and that fixed the horrible exhaust leak I had. I went tearing around town, racing ricers out of stoplights, the whole 9 yards. Well, everything was great, I'd never been so glad to hear my Mustang's painfully QUIET stock exhaust sound before! Then I noticed that my RPMs were hanging a bit when I ran them high before shifting... They've done this before, so I replaced the throttle position sensor and it got better for awhile... Now, also, when I'm idling, once they RPMs drop back to 1k, they hover there for a moment, then drop to 750, or even 500 and kind of "shudder" a little, before going back to 1k/750 and stabilizing for a moment, then doing it again.
Someone said this may be as simple as cleaning my throttle body? Is this the case? If so, how do I access the t/b and clean it?
to clean TB take off air intake and jsut use a dry rag to wipe it off with carb cleaner. or unbolt it and clean it with a dremel polishing wheel and steel wire brush.
check your spark plugs and wires. make sure they are in good shape, and that the plugs are gapped right
__________________
i have yet to find some one else who when changing their oil ( every 2000 miles or when they get bored ) details the under side of their car.
X-C April 2010,Heads, Cam,Internals April 2011, or blown engine, witch ever comes first.
The transformation has begun!
Don't forget your idle air control valve. Unbolt it and check for build-up inside of it as well.
Try not to scuff the inside of the TB too much. There is a factory coating on the inside of the TB and the MAF wire, carb clean washes it away. If the TB looks clean insde (or reasonably clean) I would not flush it with carb clean.
Use some electronic parts cleaner on the MAF wire, but same scenerio there, only so many times before cleaning it won't work anymore.
__________________
Jesse Berger 90 LX, Previous 4 cyl. (Decommissioned, 351W on the way)
H/C/I+Bolt Ons
Best ET: 12.54@106 mph 2001 V6 5 Speed Daily Driver Windstar Intake, Dual Exhuast, CAI, Headers
Best ET: 15.6@88 mph (stock trim)
my rpms hang sometimes too. i'll try the tb cleaning
__________________
I'm Japanese, and I love Mustangs.
2000 3.8l Silver Mustang. For the go: BBK CAI and true duals through Flowmaster 50's MGW short throw shifter Brenspeed Tuned. For the show: GT special edition rims reverse glow gauges, mach 1 chin spoiler, angel eyes, and hurst pistol grip, and one set of saleen side scoops sitting in the garage. Clifford Security System.
I eat rice on a daily basis. So does my car.
2001 3.8 RPMs hang / idly too low / rough. 
