poor heat at idle - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 03-12-2014, 02:24 PM Thread Starter
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poor heat at idle

PROBLEM-The truck is a 2004 f350 6.0. At low idle i do not get any heat. When driving, it takes a decent amount of time to get any heat at all and it takes the truck to be under a load to get real warm heat, For example, i use the truck mostly for plowing and the "hot" heat begins when i actually start to push snow.

BACKGROUND- The truck has right around 80,000 miles on it. Recently i had a problem with the turbo and intake manifold getting coked up with carbon. The tech removed both and cleaned them. After cleaning the tech found that the egr cooler was leaking coolant into exhaust side. So the truck has a new egr cooler. Since this the truck has done at least 50 hrs of plowing on it and i do not notice any loss of power. Also, the coolant level is right in the middle of min and max and i have not added any since the work had been done. I do recall having this problem before the egr cooler went bad but that was during summer so i rarely used the heat. I know that this is probably not connected but i want to give as much info about the truck as i can.

QUESTIONS-I have searched this topic and seen a lot of the same problems however most posts are a few years old and talk about the thermostat or head gaskets. Does anyone have any recent insight on this?

also i have watched most of the powerstrokehelp.org videos, but i have not put the aftermarket coolant cap on yet. could this problem be because of loss of pressure in the coolant system?
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post #2 of 9 Old 03-12-2014, 02:33 PM
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You need to pull some info off your truck, specifically what exactly is your coolant temperature doing. If it's not getting up to temperature then you need a new thermostat. Don't buy anything but a Ford thermostat because they fail open. Next thing to check is your water pump because it's made of a plastic composite which can have blades broken off or even cracked to a point that it spins on the shaft.


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SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #3 of 9 Old 03-12-2014, 03:15 PM Thread Starter
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so you think some sort of monitoring system like the edge griffin is the way to go? i already looked into this and i really like it. however i heard that these tunes are crap. can i use this without running the tunes and just use the monitoring system?
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post #4 of 9 Old 03-12-2014, 05:07 PM
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Heater core

05 F350
-Sinister EGR Delete
-Banks High Ram
-Blue Spring
-Air Dog II
-K&N Intake
-H&S Mini Max
-Swamps 58v FICM
-03 Turbo
-5" MBRP turbo back
-ARP Head Studs
-Cat ELC1 Coolant
-6" Lift on 37" Toyo M/T
-Detriot True-Trac with 4.56 Gears
-Pro Comp Trac Bars

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post #5 of 9 Old 03-13-2014, 04:49 AM
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Quote:
Originally Posted by x148 View Post
Heater core
The oil cooler will plug up long before the heater core will. Could be vapor locked though if the thermostat is working properly.


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SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #6 of 9 Old 03-16-2014, 07:45 PM
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Every time I've worked on a 6.0 with poor heat at idle 99% of the time it's the heater core just my 2 cents.

05 F350
-Sinister EGR Delete
-Banks High Ram
-Blue Spring
-Air Dog II
-K&N Intake
-H&S Mini Max
-Swamps 58v FICM
-03 Turbo
-5" MBRP turbo back
-ARP Head Studs
-Cat ELC1 Coolant
-6" Lift on 37" Toyo M/T
-Detriot True-Trac with 4.56 Gears
-Pro Comp Trac Bars

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post #7 of 9 Old 03-18-2014, 03:56 AM
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Quote:
Originally Posted by x148 View Post
Every time I've worked on a 6.0 with poor heat at idle 99% of the time it's the heater core just my 2 cents.
Interesting...what about if you have those exact heating issues...but once it warms up (under load) it only blows one temp? I tried running my AC the other day but all it blew was hot air...

Tom Brown
2004 Ford SEXcursion Limited 6.0
1991 Ford Mustang LX 5.0
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post #8 of 9 Old 03-18-2014, 03:58 AM
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Check to see if the air door moves.
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post #9 of 9 Old 03-18-2014, 04:01 AM
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is that the blend door? I replaced the actuator as well as t-stat.

Tom Brown
2004 Ford SEXcursion Limited 6.0
1991 Ford Mustang LX 5.0
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