Recent Topics
Omnia - the band
by Shannow
Today at 02:58 AM
Guest's devices cannot connect to my WiFi
by boulderdentist
Today at 12:54 AM
Battery stuck in flashlight.
by Chris142
Yesterday at 11:53 PM
Must read for everyone watching their diet
by JLTD
Yesterday at 11:28 PM
2014 Mazda5 Valvoline Synpower 0W-20 7500 miles
by PWMDMD
Yesterday at 10:54 PM
VOA Ravenol ECS 0W-20
by PWMDMD
Yesterday at 10:47 PM
2020 mid-engine Corvette spy vid?!
by AZjeff
Yesterday at 10:45 PM
'05 base impala. NO turn signals.FAST blinking.
by Lee4212
Yesterday at 10:34 PM
Motul 15w-50, 5 Liter 4 Pack $19.42
by hatt
Yesterday at 10:10 PM
High Lead Redline 5W40 thoughts? Ty
by Pajero
Yesterday at 09:40 PM
Source of the Mighty Columbia River
by Snagglefoot
Yesterday at 09:32 PM
Another thick/thin article to discuss
by JLTD
Yesterday at 09:23 PM
Ethylene Glycol Long Life Coolant for KUBOTA
by pburchett
Yesterday at 09:11 PM
Mobil 1 5W-30, 6,200 mi, 2017 2.3 EB Explorer
by Whimsey
Yesterday at 08:48 PM
Chevron 10w-40, 97 Nissan Maxima, 3000 miles
by OilGeek91
Yesterday at 08:36 PM
Old green antifreeze in garage storage is gelling
by JLawrence08648
Yesterday at 08:32 PM
VWs at Pick n Pull
by Eric Smith
Yesterday at 08:17 PM
Single Data Point: CK-4 destroys the flat tappet
by Gokhan
Yesterday at 08:12 PM
Breaking in new short block
by Bub
Yesterday at 07:00 PM
Should I buy a mill or a drill press?
by Vern_in_IL
Yesterday at 06:32 PM
Newest Members
azzid0906, OilGeek91, DRancher, Newuser, Varbill
65299 Registered Users
Who's Online
23 registered (2002 Maxima SE, dishdude, BobFout, billt460, Bjornviken, dlundblad, 2 invisible), 864 Guests and 60 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65299 Members
67 Forums
285816 Topics
4769950 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4482824 - 08/08/17 02:49 PM 2011 Fiesta AC issues
The_Eric Offline


Registered: 03/31/10
Posts: 5354
Loc: Iowa
Hey guys- I'm working on the Fiesta that is blowing warm air.

I had it for another concern a little while ago and while on the test drive, I noticed that the cold air would come and go- typically with acceleration, kinda like the WOT cut out. Any way, customer didn't mention it as a concern, so I left it alone. A few weeks later she calls me saying that it's not working and that they added some refrigerant. So the first thing I did was vac it down and recharge with the correct amount- seemed to work ok. Well, she called me again stating that it went back to not working again. With the gauges on it, not running I saw 375psi on the LOW side and I think 75 on the high side. Running at idle, I'm seeing around 400psi on the high side and around 35 psi low. Raising the engine speed brings the high side down to around 300 or a bit more and the low up to 75-80 psi. All values are inside a climate controlled shop at 71*F and low humidity.

Any ideas? Stuck/sticking expansion valve?
_________________________
2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M

Top
#4482846 - 08/08/17 03:23 PM Re: 2011 Fiesta AC issues [Re: The_Eric]
Chris142 Offline


Registered: 06/05/03
Posts: 16825
Loc: Deplorable in apple valley, ca
No way can you have 375 on the low side. The evaporator would have exploded long before that pressure. Sounds like the hoses are swapped on your gauges or machine and the cooling fan is busted.


Edited by Chris142 (08/08/17 03:24 PM)
_________________________
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

Top
#4482862 - 08/08/17 03:53 PM Re: 2011 Fiesta AC issues [Re: The_Eric]
kschachn Offline


Registered: 12/26/05
Posts: 9413
Loc: Upper Midwest
Originally Posted By: The_Eric
With the gauges on it, not running I saw 375psi on the LOW side and I think 75 on the high side.


If the system is off and stabilized the low and high pressures should be about the same, and should follow this chart (assuming R-134a):

_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

Top
#4482888 - 08/08/17 04:40 PM Re: 2011 Fiesta AC issues [Re: The_Eric]
The_Eric Offline


Registered: 03/31/10
Posts: 5354
Loc: Iowa
Ok so I had a derp moment... I glanced at the low side gauge and saw that it was swung all the way around past 120psi, then saw the 350 on the gauge and didn't make the connection. So it goes 0-120 psi in incremental graduations, then a black line with Retard on it then 350. I just saw that and missed the rest.

Still, the point remains- high pressure and no cooling.
_________________________
2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M

Top
#4483050 - 08/08/17 07:55 PM Re: 2011 Fiesta AC issues [Re: The_Eric]
Chris142 Offline


Registered: 06/05/03
Posts: 16825
Loc: Deplorable in apple valley, ca
Is the cooling fan working?
_________________________
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

Top
#4483064 - 08/08/17 08:08 PM Re: 2011 Fiesta AC issues [Re: Chris142]
kschachn Offline


Registered: 12/26/05
Posts: 9413
Loc: Upper Midwest
Originally Posted By: Chris142
Is the cooling fan working?

That is a good place to check. I had one that I was repairing where the fans weren't operating, and the symptoms were similar. It produced so much pressure the relief valve kept actuating.
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

Top
#4483073 - 08/08/17 08:14 PM Re: 2011 Fiesta AC issues [Re: kschachn]
SatinSilver Offline


Registered: 01/24/08
Posts: 10172
Loc: OH
There was a thread on here recently about a super high mile 2011 Fiesta. One of the repairs was the radiator cooling fan.

Thread

Originally Posted By: FutureDoc
Many would be "trade it in before it blows up" types of repairs:
Its clutch packs were replaced twice, at 347,000 and 545,000 miles. (Actually, the second time,]it proved much quicker and no more expensive to go ahead and replace the entire transmission with a nearly new, Other repairs included the main computer, fuel pump (it was making noises, Mike didn’t wait for it to fail), throttle-body motor, starter, alternator, coolant-recovery tank, radiator cooling fan, HVAC blower motor, body-control module, and the A/C compressor (“it was getting a little noisy”). The horn also was replaced, with a four-note unit from a 1971 Cadillac.
Every year it got: 26 oil changes and tire rotations 2 sets of tires 1 set of struts and shocks. Timing belt and water pump (really every 9 months, Mike got the job down to four hours)





Edited by SatinSilver (08/08/17 08:22 PM)

Top
#4483143 - 08/08/17 09:30 PM Re: 2011 Fiesta AC issues [Re: The_Eric]
Trav Offline


Registered: 11/20/06
Posts: 18893
Loc: MA, Mittelfranken.de
Just a guess..

Wrong one, pressure control valve is what I was looking for but cant find an exploded view.


Edited by Trav (08/08/17 09:36 PM)
_________________________
ASE L1, Master. Deutsch Meisterbrief.

Top
#4483147 - 08/08/17 09:35 PM Re: 2011 Fiesta AC issues [Re: kschachn]
The_Eric Offline


Registered: 03/31/10
Posts: 5354
Loc: Iowa
Originally Posted By: kschachn
Originally Posted By: Chris142
Is the cooling fan working?

That is a good place to check. I had one that I was repairing where the fans weren't operating, and the symptoms were similar. It produced so much pressure the relief valve kept actuating.


Yes.
_________________________
2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M

Top
#4483188 - 08/08/17 10:44 PM Re: 2011 Fiesta AC issues [Re: The_Eric]
dishdude Online   content


Registered: 11/14/08
Posts: 8754
Loc: Phoenix
Assuming the blend doors are working it can only be the compressor or expansion valve. Quote 'em both.
_________________________
2018 Challenger SRT

Top