Please look at this pic...

Origommi · Jun 11, 2006

OK all here is the deal... I have been hearing this clicking noise coming from some where under the hood. When I am driving and it starts to click I feel like the car studders a little then goes back to normal. It only does it when the AC is on. I opened the hood and this is the part that is making the clicking sound. When it clicks it stops rotating for about 2 seconds then starts spinning again. Thanks for all your help all.

stangman · Jun 11, 2006

that's your ac pulley

check clearances on the pulley & to see if there is any slop in it

Origommi · Jun 11, 2006

You mean see if there is anything hanging it up and to make sure the belt is tight?

stangman · Jun 11, 2006

Origommi said:
You mean see if there is anything hanging it up and to make sure the belt is tight?

yes check to see if it's hanging up on anything, but also to see if it will wobble

Pearl02 · Jun 11, 2006

Hard to tell from the picture but that loooks like your ac compressor. What you a describing is the ac compressor cycling on and off. That "click" noise is the compressor clutch engaging and disengaging. The "studder" should like it happens when the ac compressor is engaging. Mine does the same thing. I don't think you have anything to worry about. Pearl02.

Origommi · Jun 11, 2006

Do you really think the belt not being tight would cause it to seize like that? I will check it in a few minutes.

Origommi · Jun 11, 2006

Yes, I think your right, but it cycles every 30 seconds and It makes my car studder.

Origommi · Jun 11, 2006

Just checked on it. Its engaging about every 5 seconds and everything looks fine with it. No lose bolts or belts. Any suggestions??

loosescrew79 · Jun 11, 2006

It will click on and off more often depending on how hot it is. To check the pulley by itself try turning the a/c off. It should not click on/off. The pulley will still spin and should not make any noise.

DTNODYA · Jun 11, 2006

I think what you are describing is normal. My truck's A/C cycles on and off every 2-3 seconds sometimes. To prevent it (because it is annoying and makes my truck bog a little every 2-3 secs) I turn the A/C knob a little up from 'fully cold'. If that makes any sense. Try turning your cold/hot knob just a bit above 'fully cold' and see if it has more time between cycles. Hope that helps maybe?

Origommi · Jun 11, 2006

I am glad I wasnt the only one. Mine is bogging every few seconds also. I will try what you said. Thanks for the input.

CRZYHRSGT · Jun 11, 2006

When it clicks and the center spins then your compressor is enguaged and cycling your a/c system. It's completely normal. unfortunately, so is the bogging down of the power when it does come on. I'm actually kinda surprised how much power it robs on these V8s.

COramprat · Jun 11, 2006

It shouldn't cycle every few seconds though. Could be the coil going bad. Not too hard to replace but you might want to look at it a little closer before you call it a day.

DTNODYA said:
I think what you are describing is normal. My truck's A/C cycles on and off every 2-3 seconds sometimes. To prevent it (because it is annoying and makes my truck bog a little every 2-3 secs) I turn the A/C knob a little up from 'fully cold'. If that makes any sense. Try turning your cold/hot knob just a bit above 'fully cold' and see if it has more time between cycles.

Sounds like you may have a thermostat problem. Not normal either but if dropping the temp down a hair solves it you are OK unitl it goes out.

Shiroelex · Jun 11, 2006

Well, that clutch will engage whenever the defrost is on, or if the AC is on. It will do that on/off/on/off action when there isn't enough pressure in the AC system. I would imagine you have a tiny leak somewhere, and the pressure sensor is preventing the system from staying engaged. Either that, or the compressor has taken a crap on you. I would try a can of R134a, and see if that helps at all.

The compressor should never engage if your blower motor is off, and the vent is set to floor, or vent. If it's on defrost or ac, it will cycle randomly. I would turn the thermostat to hot, vent to floor, and turn the blower off, and see if the compressor kicks on and off. If it does, try disconnecting the electrical harness right by the pulley on the compressor. If it still kicks, you have a compressor clutch hanging up. If it doesn't engage, then I'd blame the problem on low system pressure.

Outlaw97GT · Jun 11, 2006

COramprat said:
It shouldn't cycle every few seconds though. Could be the coil going bad. Not too hard to replace but you might want to look at it a little closer before you call it a day.

I agree, You might want to check the system pressure. Could be low on R134.

TangerineGT96 · Jun 11, 2006

Origommi said:
Yes, I think your right, but it cycles every 30 seconds and It makes my car studder.

thats because its loadin down your motor my car does the same thing and it gets on my nerves i think underdrive pullys might slove our porblem

hotmustang331 · Jun 11, 2006

Freon may be getting low also....it shouldnt cycle every 5 seconds. Mine doesnt do that...it cycles MUCH slower. Ill try and count next time.

DTNODYA · Jun 12, 2006

COramprat said:
It shouldn't cycle every few seconds though. Could be the coil going bad. Not too hard to replace but you might want to look at it a little closer before you call it a day.

Sounds like you may have a thermostat problem. Not normal either but if dropping the temp down a hair solves it you are OK unitl it goes out.

This is on my Ranger not my Mustang. But regardless, I may inspect it further. It blows cold air fine (freezing cold air) but when the knob is turned all the way to the coldest (bluest of the blue), that is when my compressor cycles on/off every few seconds. If I turn the temp up (back towards the red) slightly, the compressor cycles more 'normally'.

Either way, should I just get a can of R134 or whatever and put it in? I've never done A/C stuff before .. Do you just hook a can up and spray it in? How often are you supposed to 'recharge' your A/C system?

Many ?'s, anyone feel free to answer em'.

COramprat · Jun 12, 2006

DTNODYA said:
This is on my Ranger not my Mustang. But regardless, I may inspect it further. It blows cold air fine (freezing cold air) but when the knob is turned all the way to the coldest (bluest of the blue), that is when my compressor cycles on/off every few seconds. If I turn the temp up (back towards the red) slightly, the compressor cycles more 'normally'.

Either way, should I just get a can of R134 or whatever and put it in? I've never done A/C stuff before .. Do you just hook a can up and spray it in? How often are you supposed to 'recharge' your A/C system?

Many ?'s, anyone feel free to answer em'.

You have to have the hose to connect to the system. I've seen the single use cans with a hose attached at Wal-Mart. Recharge kits are about 25 I think. Most come with a can of R134. May even have the guaged hose so you can measure the pressure in the system.

MaxedGT · Jun 12, 2006

More than likely, not a guess, your refrigerant is low, causing it to cycle way too often. Hard to say for sure, but looking at that picture your a/c compressor clutch looks in rough shape. It could be damaged by cycling too often, or the compressor could be starting to sieze. I'd get it checked by a pro. You might want to pull off the conector at the compressor till you get it fixed, to prevent further damage.

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