low oil pressure

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Dec 17, 2012 | 11:14 AM

f350ranchand

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low oil pressure

Changed the tranny out in my 05 f350 and decided to go ahead and change my motor oil to 10-30 motorcraft diesel oil now im getting a low oil pressure on my gauge cluster message if its idling the gauge is bottomed out but if im drivin the gauge reads normal this has happened a few times in the past but shortly started workin after about 10 miles of driving and sumbody correct me if im wrong but if the truck didnt have oil pressure it wouldnt run right would it

Dec 17, 2012 | 11:22 AM

2006powerstroke90

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Probably a failed oil pressure sensor

Dec 17, 2012 | 11:23 AM

mustang_309

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From: South Weber, Utah

As long as you have enough pressure to keep the HPOP in oil then it will run.

Dec 17, 2012 | 11:47 AM

f350ranchand

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Is the sensor behind the oil filter housing

Dec 17, 2012 | 05:46 PM

dannyboy950

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The instrument cluster gauge sensor is behind the oil filter and is about useless, it only reads 7 psi. The hpoil system sensor is on the front passenger valve cover and can only be read by a monitor device or a scanner. 500 psi min. to start. The low pressure system can only be read accureately by a mechanical test gauge thru a port on the bottom front of the oil filter houseing. 45 psi min.

Dec 17, 2012 | 06:37 PM

Misky6.0

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From: Ouray, CO

I had similar issue after switching to syn. 5W-40. No oil preasure reported sometimes going 75mph too. Replaced oil pressure sensor fixed it. My sensor
wire leads were covered in oil too.

Dec 17, 2012 | 07:27 PM

f350ranchand

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I ordered a new sensor gonna change it tomorrow thanks for the input everybody

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Dec 18, 2012 | 07:23 PM

greentree ford

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check for a lose pin or corrosion at instrument cluster connection

Dec 19, 2012 | 08:50 AM

#10

F250BlackChrome

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Quote:

Originally Posted by f350ranchand

Put the new sensor in still the same low oil pressure message and gauge drop

I would verify (by a real gauge) your oil pressure.

Anything above 7psi and your idiot dash gauge will read in the mid normal range on the dash. Anything below 7psi will cause the dash gauge to read at the bottom of the scale and trigger a light.

I actually have a real Autometer Oil Pressure gauge and read it from the top of my billet aluminum cap.

Dec 19, 2012 | 08:53 AM

#11

F250BlackChrome

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My readings with oil temp at 190* are:

Idle = 20 PSI with 10W-30 and 22 with 15W-40 or 5W-40.

Running down the highway: 56 PSI 10W-30, and 58PSI with 15W-40 and 5W-40

Dec 19, 2012 | 08:54 AM

#12

F250BlackChrome

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126,000 mile on truck.

Dec 19, 2012 | 02:12 PM

#13

f350ranchand

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Ordered a mechanical gauge im past u on the miles im sittin on 252k lol and my engine hour meter stopped a yr ago 9999.9

Dec 19, 2012 | 08:03 PM

#14

RideDiesel88

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Why havent you been running 15w40 or 5w40?? How long have you been running 10w30? Thats what i run in my f150

Dec 19, 2012 | 10:37 PM

#15

f350ranchand

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Started doin it last winter truck started much better and not much injector sticktion to my knowledge ive only had to change 3 injectors since ive owned the truck and ive put 170k on it but i have replaced many other parts including the motor 3 days after i bought it but ford covered the motor replacement