Ford A/C :: 2002 - No Cooling - Clutch Engages Then Cycles Off?
Apr 25, 2016
I have a 2002 Ford Explorer with AC that is not cooling. The AC clutch engages, then cycles off and repeats the process over and over. With a gauge on the low side port, the pressure rises to around 65 psi when the compressor is off, then drops in seconds down to nearly 10 psi. Does this indicate low AC pressure? I have always seen the pressure pretty much stay static at a certain pressure....haven't ever seen it fluctuate like that from low to high as the compressor kicks in and out.
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2002 - f250... I originally posted this issue in July of '03. Nothing has changed.
1. At max ac, regardless of how hot it is, the ac clutch cycles due to low pressure once the cabin temp reaches about 78 degrees. This is not acceptable or expected in my opinion.
2. I have run extensive tests, done this for years, and the conclusion is that there is too much pressure drop in the evaporator. I'm seeing 5-7 psi drop measured using a Fluke digital temp probe, insulating the probe tip around the pipe. Compare outlet of orifice tube several as far away from orifice as possible and comparing to outlet temp of evaporator where it comes out of the plastic shrowd. Convert temp to pressure.
I've seen many posts over the years of people not happy with '99 to '04 ford truck ac operation at cruising speed. I have confirmed that the compressor is cycling way too much to cool the cab down. I even ran an experiment where I completely blocked the condensor to raise the head pressure and the compressor still cycked at 1500 rpm's with the cab above 75 degrees on a 90+ degree day.
My next step is to blow out the evaporator and see how much oil and junk I get out of it. I'm also considering taking the evaporator out and trimming the rubber gasket that is around it. It is blocking about an inch of the coil face all the way around.
My conclusion still is that the evaporator just isn't loading up enough as if it's partially clogged. There is only about 2 psi drop between the outlet of the evaporator and the compressor.
The compressor cuts out at 21 psi so the low pressure cutout switch is working properly.
What should I use to flush the evaporator out? Will mineral spirits do it as long as I blow it out real well and make sure I get all of it out? Also wondering if I should blow out the condensor thinking maybe there is something clogging it up.
In spite of some folks on this forum saying it is normal for the compressor to cycle at cruising speed, that is a correct statement depending on many factors. In my case, the cycling is not normal or expected. I have also tried:
1. VOV
2. Larger orifice
3. 14 oz charge over what the sticker says
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The clutch is on 2 seconds and off 2 seconds, and there is a click up on top that clicks every 2 seconds ?..........no cold air either.
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2000 Explorer Sport with 4.0L SOHC engine. When I turn on the A/C the clutch on the compressor cycles off and on every 10-15 seconds. The A/C cools and the gas charge is checked as OK. Is this normal?
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How often should my A/C clutch be cycling when the compressor is being used. (i.e defrost, mix, a/c and max a/c). My clutch never cycles, it starts spinning when I turn something on and it does not shut off until I shut off the a/c. The truck is a 95 F-150 4.9L 5 speed...
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I have a 99 f350 7.3 diesel. The AC clutch cycles on for 3-4 turns and then off for 45 sec. It the does it again. The low side starts to cool down and then the clutch quits. as the truck warms up the clutch quits completely. it will restart for a few times if I push in on the elec conn on the ac clutch. My Ac has quit cooling and summer is almost here.
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The issue I'm having is the A/C. When I got the truck the A/C was completely freezing. Recently however, the compressor was having issues not engaging and I fixed that by simply plugging the cord to the accumulator thing. . Now the compressor engages, but is not cooling really at all. It is an old truck and the compressor is a little worn from what I see maybe 2mm space when not engaged. I checked the levels of freon/coolant with a gauge and the amount is perfectly fine. Plus there seems to be no leaks.
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1996, f150, 300, 4x4, 5 speed, 296,000 miles... My pedal goes almost to the floor before the clutch engages and about a half inch, maby less, of travel back out the clutch disengages. I think it is about time for a new clutch. My question is what is the best clutch to put in my truck?
while i have the transmission slid back to replace the clutch i am planning on replacing the slave cylinder while im in there as well. Any particular brand better than the next on that item? Are there any other items that I should think about replacing while i have the transmission slid back to do the clutch?
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2004 Ford Ranger revs the engine when you engage the clutch then when you place it in gear it's like the cruises on it want to drive without you touching the Accelerator?
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2006 4.2L The pedal is good and the fluid is full but the clutch engages and releases about 2 inches from the floorboard. Is there possibly a rod that can be adjusted at the slave cylinder that moves the engage/release point along the pedal travel? Any thoughts before I get out the creeper?
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1996 F150 4x4 with 300/6 and M5OD mazda tranny. 145k miles on it and looking really clean, and just the truck we wanted. It used to be well cared for, but has been a bit neglected since the owner passed away.
I spent a few hours searching the forums here and didn't find anything matching my symptoms exactly so I thought I would just jump in a post, but if I missed a thread feel free to redirect me.
I've got a bit of a rattling noise as the clutch engages when taking off in first. Once the clutch is fully engaged it's quiet and it shifts well and smooth. Noise also occurs (but less so) if I don't match RPM's and ride the clutch into second or third. I don't think its engine noise from lugging or anything because it goes away as soon as the clutch is fully engaged or disengaged.
Changed the trans fluid last night and no different, Clutch fluid reservoir is full, clutch travel feels good, master cylinder looks good, (slave is hidden, but looks dry though dust cover) a little play in the white bushing that holds the clutch pedal bar in place, and the plastic pushrod that goes into the firewall, thinking about replacing this linkage.
I work on big diesels for a living so i'm not scared of getting greasy. I'm almost inclined to think someone did a clutch job without resurfacing the flywheel. Is there an improved replacement for the pedal bracket and linkage? I don't mind just doing the clutch, but I don't want to be throwing my money away.
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I own a 1971 Ford F-250 Custom with the 4 Speed Synchronized Warner T-18 transmission. When I put in the clutch, once it engages, it makes a very loud whirring noise. I'm not concerned about the noise as much as possible issues with the transmission itself.
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I recently changed the clutch in my 1967 F 250, all was golden. This was about 5 months ago , just the other day when going from 2nd to 3rd gear there is a clang and popping feel. the truck was making similar noises before the clutch blew out causing me to change it last time.
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Just bought a 2009 Accent 5 speed I have 2500 miles on it .The clutch engages when the pedal is right at the top. Is there an adjustment on this vehicle I would prefer it to engage about mid stroke.
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Currently driving a GTI mk7 autobahn 6MT, this is my first manual transmission i have owned.. and have a question about a squeak like noise i hear when the clutch engages in gear 2 and 3.
This does not happen all the time, however i noticed that some / most of the time when i slowly let the clutch out in gear 2 and 3, right after the clutch engages and i let it out the rest of the way, it makes a squeak kinda sound.. almost like springs contract / retracting, i can also slightly feel it in the pedal.
Question is ...is this some what normal? i have never owned a MT car, and cant remember if such a thing happened while driving friends / family MT in the past..
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I have a 2006 Toyota Sienna with approx 64K miles. Recently, I am hearing a squealing noise when the AC clutch engages (AC is working fine and blows very cold air). When AC is off for when the clutch is not engaged - no noise at all..... I have been getting alot of different answers as to what it could be and it is very confusing.... to me - it sounds like a clutch issue and I have seen videos on how to take apart and see if it is a bearing or bad clutch. I did pull the belt and checked the pulley - it turns freely and there is no bearing movement. How I can go about getting it repaired without replacing the entire compressor and other expensive parts.
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In every other manual transmission vehicle I have ever driven, the clutch pedal engages/disengages within an inch of the floor. Is it normal that the clutch in my 2002 Hyundai Elantra engages when the pedal is so far away from the floor? When I say far away from the floor I mean within an inch of the pedal being fully released.
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The cooling fan clutch never seems to disengage so I was wondering where can i find a clutch that is light duty so it will disengage easy and work with gas mileage napa list two different ones, maybe off a different vehicle....
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A high pitched squeal appears to come from the front of the a/c compressor whenever the clutch engages. When the clutch disengages the compressor stops spinning, and the squeal stops. I can watch and listen to this as the system cycles with the a/c switched on. If I turn off the a/c, no squeal. I'm guessing the bearings in the compressor are going out. However, the system still cools normally, so apparently no gas has leaked out.
Does this imply the compressor must be replaced, or could injection of some oil into the system possibly fix it...?
This car only has 73,000 miles on it. I've owned 2 other TB's and a couple classic Mustangs with much higher miles and never seen an a/c compressor bearings fail.
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98 Jetta TDI hydraulic system ... We just received this vehicle from my mother in law, who is not driving any more. It's a cream puff--79,000 miles, beautiful condition. Problem is the clutch engages lower and lower to the floor, and eventually the shifter gets stuck in gear. The brake pedal slowly sinks to the floor when at stops on hills. Our mechanic tells us these two are connected because both the clutch and brake run off the same hydraulic system.
1st time he said the fluid was filthy, and he emptied the system and put in clean fluid. Worked for a little while and then we were back where we started. Second time he replaced a couple parts on the clutch, replaced this fluid, and this time it ran like a dream for a little over a month. Then the problem just returned. Again he says the fluid is filthy, and now we are looking at replacing the master cylinder and again changing the fluid. The theory behind why this is happening is that my mother in law let the car sit for half a year before passing it on to us. She didn't do much driving the 6 months before that either. I've done research, and this doesn't appear to be a common problem by any means on these cars.
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I need to replace the fan clutch on my 1993 Ford E150 Club Wagon 4.9L Chateau. The original part, YB466 has been replaced. The new ones are all too long and the fan will hit the radiator. The original is 2-3/8" long front to back, including the nut. The replacement ones available are 2-5/8" or longer. I have talked to our local machinist, and he says the new parts cannot be made shorter. The water pump shaft is not long enough to allow shortening. He says look for a shorter water pump.
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