need help 05f350 6.0 clutch fan runs constantly turbo builds 30lb then to zero throwing p0198 help - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 6 (permalink) Old 02-19-2015, 08:57 PM Thread Starter
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need help 05f350 6.0 clutch fan runs constantly turbo builds 30lb then to zero throwing p0198 help

My of f350 is haveing cold start issues won't start on first try throwing code p0198 is is very cold here. Which it normaly stays in the 30's in the winter. Its been in the teens and the negatives the last few days. Clutch fan is running constantly turbo loses all boost then u Kik into it and it shoots up to 30. Normally it never builds more than 24lb. Check engine light on. New ficum head studs bullet proof oil cooler and egr cooler. Egr turned off 5new injectors k&n cool air intake. Truck was running fine. I stopped and got fuel and started the truck. It missed then ccut off. Started it back up it ran fine. Started it late lastnight and been having the above issues. The turbo issue started this morning. Will the OTC cause all this? Is the truck in limp mode and that's y the turbo is acting up?
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post #2 of 6 (permalink) Old 02-19-2015, 10:00 PM
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Re: need help 05f350 6.0 clutch fan runs constantly turbo builds 30lb then to zero throwing p0198 help

Do you have the ability to scan the temps on your coolant and oil > think the 198 is oil temp circuit. is your antifreeze good good? get some readings on the temps and report back. also check the wires to the Oil temp sensor and coolant sensor while your under the hood. Dont have any suggestions on boost right now.. but lets start with some basic stuff.

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2005 F250 Harley CC SB Banks IQ, 4" Exhaust, Banks Techi Cooler with High Ram, Cold Air Intake, Cat Delete,EGR Delete,Coolant Filter,Amsoil Oil Filter Bypass, PHP ECM Rollback, PHP FICM Tuner, WW2,Rancho 9000XL shocks. Firestone Air Springs w/Daystar Cradles. 224K
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post #3 of 6 (permalink) Old 02-19-2015, 11:59 PM Thread Starter
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Re: need help 05f350 6.0 clutch fan runs constantly turbo builds 30lb then to zero throwing p0198 help

Using the data log function on my SCT tuner. If I'm Reding it right engine oil temp (eot_f) is showing 181.77 colent temp (ect) is showing 180 at idle after driving 30min or home. Head studs and egr work was done less than 6months ago id assume they would have had to pull radiator to do that. So would assume they changed Coolent then. I took interstate to work when I had boost issue. Came back through town and turbo was doing fine. It
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post #4 of 6 (permalink) Old 02-20-2015, 12:05 AM Thread Starter
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Re: need help 05f350 6.0 clutch fan runs constantly turbo builds 30lb then to zero throwing p0198 help

I let idle for 20 min. Coolent and oil temp went to 175 staying within one degree of each other. Took it down interstate and they both got up to 182. What ever "dit" is is staying around 4 at idle. Keep in mind it is 7degrees here with snow on the ground and a wind chill in the negatives. I opened it up going up on ramp. When the engine wound up to a higher rpm the fan mad god awful noise. Could have been gust of wind blowing into front or truck but I don't think so. Normally I can hit over 100mph up that ramp and never hear the fan Kik on. Only times I've herd it Kik on b4 is when pulling.
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post #5 of 6 (permalink) Old 02-20-2015, 12:16 AM Thread Starter
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Re: need help 05f350 6.0 clutch fan runs constantly turbo builds 30lb then to zero throwing p0198 help

Recommended readings - Temperatures and Pressures







STOCK READINGS
Normal Severe Service Alarm
Tranny Temp 150 - 195 195 - 200 220
Coolant Temp 190 - 200 200 - 215 215+
Fuel Press 60 - 50 50 - 45 45
EGT - pre Turbo 650 - 1200 1200 - 1250 1300

EGT - post Turbo 700 900 1000
Boost 0 - 26 27 - 28 28
Oil Temp 200 - 215 215 - 230 230+








READINGS WITH TUNERS
Normal Severe Service Alarm
Tranny Temp 150 - 195 195 - 220 230
Coolant Temp 190 - 215 215 - 220 220+
Fuel Press 60 - 50 50 - 45 45
EGT - pre Turbo 650 - 1200 1200 - 1300 1300
EGT - post Turbo 700 900 1000
Boost 0 - 26 27 - 30 30+

Oil Temp 200 - 230 230 - 235 235+



Also: Coolant Temp
Some say fan kicks on at 210, some say 215, others say 220. Full explanation: Engine temperature is not the only parameter that the PCM monitors to determine cooling fan operation. This is the reason that you will see some variation in engine temperature as it correlates to fan operation. The operation/description of the FSS (Fan Speed Sensor) from the PC/ED manual has a fairly good explanation as to how the system "thinks". This is not your traditional engine hits temp X and the fan clutch locks up. The fan speed sensor is a Hall-Effect sensor integral to the vistronic drive fan (VDF). The powertrain control module (PCM) will monitor sensor inputs and control the VDF speed based upon engine coolant temperature (ECT), transmission fluid temperature (TFT) and intake air temperature (IAT) requirements. When an increase in fan speed for vehicle cooling is requested, the PCM will monitor the FSS signal and output the required pulse width modulated (PWM) signal to a fluid port valve within the VDF. Engine begins to defuel at 221 deg. The thermostat begins to open at about 190*F to 195*F and is not fully open until about 215*F to 219*F..

Also: Oil Temperature
Usually 5-15 deg above coolant temp. Engine begins to defuel at 253 *F oil temp (PC/ED manual). You should not exceed the ECT by more than 15 degrees.

So - The readings are based somewhat on opinions, somewhat on Ford values. People COULD argue that 220 and 230 are too conservative as alarm temps for the transmission. I couldn't really disagree too much, but I will say that for many transmissions, these alarm values are good. Most folks I talk to say their transmission runs way cooler than these alarm temps. IMO alarms should be set to inform you that something is not normal BEFORE you get into a danger zone. Also, some people with tuners and studs say 1400 - 1500 EGT MAY be OK for VERY SHORT bursts - I wouldn't want to do it. Lastly, BOOST values depend heavily on aftermarket mods like studs, turbo and tuners. It is really very hard to define a set of readings that apply to everyone. I know some people running at 40 psig boost w/ studs though and they do not seem to be worried. Even with studs, this would make me nervous.



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Recommended readings - Temperature and Pressure - Ford Truck Enthusiasts Forums
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post #6 of 6 (permalink) Old 02-20-2015, 12:45 AM Thread Starter
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Re: need help 05f350 6.0 clutch fan runs constantly turbo builds 30lb then to zero throwing p0198 help

The going to the OTC was unplugged. Thank u for your help I really apriciate it
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