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11-26-2013, 08:12 AM
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Liking the Ford Ranger Forum
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Join Date: Nov 2013
Posts: 18
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4.0 OHV Coolant extremely cold
For starters, I've got a 2000 Ranger XLT 4x4 ORP. I've noticed lately that it's been running extremely cold. At first I didn't think much of it, as I've noticed the temp gauge is slightly off. To be safe, I talked with a UPS mechanic buddy of mine, he said not to worry, that at most it would effect my MPG. Earlier this morning I drove it at highway speeds for about 30 miles and it barely cleared 140 Fahrenheit. My heat it working just fine and the truck seems to operate just as well, both while driving and at idle. It's not throwing any codes, but just the other day it tossed up 2 lean codes indicating the MAF was tripped. I deduced that that code was caused by my girlfriend taking it to get groceries after I had taken the air filter out to clean and had not yet replaced it because it was drying. I'm kind of dumbfounded... It's not terribly cold here in NW Arkansas (about 40 F) and the truck and heat both function well. Anyone know what might be causing this? Do I have a faulty temp gauge? Or maybe the most efficient cooling system ever? Lol sorry for the long read, but any help is appreciated!
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11-26-2013, 09:17 AM
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Ford Tough
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Join Date: Nov 2012
Posts: 377
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Try replacing the thermostat with a new motorcraft one
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11-26-2013, 09:27 AM
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Ford Ranger Driver
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Join Date: Mar 2013
Posts: 6,187
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Quote:
Originally Posted by MyNameIsAaron
For starters, I've got a 2000 Ranger XLT 4x4 ORP. I've noticed lately that it's been running extremely cold. At first I didn't think much of it, as I've noticed the temp gauge is slightly off. To be safe, I talked with a UPS mechanic buddy of mine, he said not to worry, that at most it would effect my MPG. Earlier this morning I drove it at highway speeds for about 30 miles and it barely cleared 140 Fahrenheit. My heat it working just fine and the truck seems to operate just as well, both while driving and at idle. It's not throwing any codes, but just the other day it tossed up 2 lean codes indicating the MAF was tripped. I deduced that that code was caused by my girlfriend taking it to get groceries after I had taken the air filter out to clean and had not yet replaced it because it was drying. I'm kind of dumbfounded... It's not terribly cold here in NW Arkansas (about 40 F) and the truck and heat both function well. Anyone know what might be causing this? Do I have a faulty temp gauge? Or maybe the most efficient cooling system ever? Lol sorry for the long read, but any help is appreciated!
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Thermostat is proly stuck open try replacing it and flushing the coolant
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95 Ranger XLT 4x2 2.3 I4 5 speed 206,000 *dead*
96 Ranger XLT 4x4 4.0 V6 5 speed 173,000 *alive*
D35 front, 8.8 rear, 3.73 gears, limited slip rear diff
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11-26-2013, 09:38 AM
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Ford Ranger Driver
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Join Date: Jan 2009
Posts: 6,268
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Re: 4.0 OHV Coolant extremely cold
Quote:
Originally Posted by 96_4x4_XLT
Thermostat is proly stuck open try replacing it and flushing the coolant
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I agree, most likely the Tstat is stuck open. When you put your scanner on it what is the ect reading?
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)
2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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11-26-2013, 11:22 AM
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Ford Ranger Driver
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Join Date: Mar 2010
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Re: 4.0 OHV Coolant extremely cold
T-stat issue, replace with a Motorcraft for best result and make sure colling system completely urged of air. As for codes, please post the actual code #; A lean code need not automatically mean MAF, readers need to code # to evaluate the situation and reply.
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2004 Ranger FX4 Level II, 5R55E, Sonic Blue Pearl
Proudly JAP/RICE free since March 2000
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11-28-2013, 10:21 PM
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Liking the Ford Ranger Forum
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Join Date: Nov 2013
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Re: 4.0 OHV Coolant extremely cold
Well, I replaced the tstat and that fixed that issue. I cleaned the MAF sensor and cleared the codes, 36 hours later and they haven't popped back up yet. I just want to say thanks for you help fellas! Hope y'all had a great thanksgiving!
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Quote:
Originally Posted by cowboybilly9mile
As for codes, please post the actual code #
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Sorry man, I thought I responded to this the other day. The codes in question were P0171 and P0174. As I said in the other post, I cleaned the MAF sensor and cleared them, they haven't showed up again as of now. I appreciate the help and I'll let you know if they do show back up.
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11-29-2013, 09:17 AM
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Ford Tough
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Join Date: Nov 2012
Posts: 377
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Quote:
Originally Posted by MyNameIsAaron
Well, I replaced the tstat and that fixed that issue. I cleaned the MAF sensor and cleared the codes, 36 hours later and they haven't popped back up yet. I just want to say thanks for you help fellas! Hope y'all had a great thanksgiving! ---------- Sorry man, I thought I responded to this the other day. The codes in question were P0171 and P0174. As I said in the other post, I cleaned the MAF sensor and cleared them, they haven't showed up again as of now. I appreciate the help and I'll let you know if they do show back up.
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Great to hear!
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