F250 Coolant Temp!?
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Senior User
Joined: Aug 2014
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From: Meridian,Ms
F250 Coolant Temp!?
Hey I'm new to this forum and diesel's. I recently bought a 2004 F250 6.0 Turbo Diesel. Upon purchasing I changed the oil, oil filter, fuel filters and coolant filter. I installed a Bully Dog GT Diesel today. Installed with no problems test drove fine. With the bully dog on no power level I drove to my uncle house and about halfway there I got a Defueling Coolant message on my bully dog and truck would not accel and brakes were also hard. Pulled over to the side of the road and shut the truck off and started it again and everything was fine. The default defeuling temp is 210 the temp was reading about 218 before shut down. When I got to my destination I restore back to factory settings and the coolant temp never went about 195 the oil temp hit 204 but that was it. Does anybody know the cause of this and I was only driving about 50-60mph.
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Joined: Sep 2010
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tuner
Hey I'm new to this forum and diesel's. I recently bought a 2004 F250 6.0 Turbo Diesel. Upon purchasing I changed the oil, oil filter, fuel filters and coolant filter. I installed a Bully Dog GT Diesel today. Installed with no problems test drove fine. With the bully dog on no power level I drove to my uncle house and about halfway there I got a Defueling Coolant message on my bully dog and truck would not accel and brakes were also hard. Pulled over to the side of the road and shut the truck off and started it again and everything was fine. The default defeuling temp is 210 the temp was reading about 218 before shut down. When I got to my destination I restore back to factory settings and the coolant temp never went about 195 the oil temp hit 204 but that was it. Does anybody know the cause of this and I was only driving about 50-60mph.
Token Redneck
Joined: Jun 2007
Posts: 9,337
Likes: 346
From: Breckenridge, TX
Blame the tuner, demand a refund for it messing up your truck, then buy an SCT before you mess anything up permanently.
Defuel at 210*f is too low, stock is 221*f. If the Bully Dog really needs it that low for EGTs or something, I'd be concerned.
https://gearheadautomotiveperformanc...uning-Products
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Defuel at 210*f is too low, stock is 221*f. If the Bully Dog really needs it that low for EGTs or something, I'd be concerned.
https://gearheadautomotiveperformanc...uning-Products
Welcome to Quick Tricks! Custom Tuners Miami, Florida
Innovative Diesel Ford 6.0L Three Custom Tunes - Home Page Products
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Senior User
Joined: Aug 2014
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From: Meridian,Ms
The default temp was 210 and of course I had no idea about the normal running temps I took it to the dealership had a once over and a coolant flush increase the default defeul temp to 220
Token Redneck
Joined: Jun 2007
Posts: 9,337
Likes: 346
From: Breckenridge, TX
I don't know how Bully Dog does their mapping so I wouldn't increase the defuel point without adding an EGT gauge. Does it have a shift on the fly programming capability? Bully Dog has a bad reputation as a transmission killer since it doesn't change the transmission tuning along with the PCM.
Temps and pressures:
https://www.ford-trucks.com/forums/9...-pressure.html
Temps and pressures:
https://www.ford-trucks.com/forums/9...-pressure.html
Token Redneck
Joined: Jun 2007
Posts: 9,337
Likes: 346
From: Breckenridge, TX
EGT is exhaust gas temp. More power comes from burning more fuel, so naturally both coolant temp and exhaust gas temp increases as more fuel is burned. Normally EGT should be 400-600*f, but going over 1250*f for prolonged periods can damage the engine. Since there's no EGT gauge on the truck from Ford, ECT is cab be used as a proxy to determine how much fuel is being burned. If you normally run at 190*f ECT, but the tuner pegs that up to 210*f under the same conditions, odds are your EGT is also way higher than it should be. The solution is to install an actual EGT gauge so you don't have to guess, and so you don't risk damaging the engine by 1) running too high of EGT, or 2) shutting the engine down with high EGTs and damaging the turbo. Always let the engine idle until EGTs come down to the 400*f range for a few minutes to cool the turbo down, or else you'll have problems with it.
Something like this:
ISSPRO R17022 EV2 Series Pyrometer Gauge at DieselManor
3-Gauge Install Pictures
Something like this:
ISSPRO R17022 EV2 Series Pyrometer Gauge at DieselManor
3-Gauge Install Pictures
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