I just purchased a 2002 Ranger 3.0 with 100K miles. I noticed when the ac is on and I am driving I hear a chirping noise every 8-10 seconds. If I am idiling with ac on I don't hear the chirping noise. If I turn ac off and continue to drive I don't hear the chirping noise either.

Any ideas?

__________________
Curt
2002 Ford Ranger XLT (3.0)

Check everything around your AC unit to see if something is loose. I had a similar problem and sure enough it was just a loose component making a slight rattle.

__________________
2006 Ford Ranger Sport 4.0 2WD on 32x11.50R15s
-3" Doetsch Spindle Lift


Using the forum:
How to Post on the Forum
Creating a signature (do this before asking any questions)
Upload an Avatar (image of your Ranger)
How to Post Pictures on the Forum
Switch the site layout: Light Theme or Dark Theme

Things to do:
Participate in Truck of the Month
Participate in the Ranger Photo Contest
Participate in the Non-Automotive Photo Contest
Become a Site Contributor
Shop at the FordRangerForum.com Store

On some Fords, the AC compressor clutch will give a metallic chirp each time it cycles on. As you said, this is most noticeable when driving at light throttle above idle. It can be annoying but doesn't seem to hurt anything. Short of replacing it, I don't know of a proven cure.

__________________
2003 FX4 Level II, Supercharged 5.0L V8, Headers, Duals
BW4406 manual transfer case, Aussie Locker, Torsen L/S, 4.10's
Bilstein 7100 rezzies, Cadillac/Mustang rear discs, Duff traction bars
Keypad Entry, Lock LEDs, ABS switch, sway bar discos
Heated seats, Explorer EATC, Trip Computer and consoles

2003 XLT 2.3L M5OD-R1 reg cab, 2011 Taurus SEL, 2016 C-MAX Energi Plug-in Hybrid