Low Oil P On start, Jumping on cruise
12-18-2012, 07:55 PM
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Low Oil P On start, Jumping on cruise
04 f150 scab 107k
So last week had a mis-fire code on cylinder 6. Sparks changed 4k miles ago. As a diagnostic measure, i swapped the coil on 6 with 5. Since then no issues, and this may not be related just wanted to be through.
This morning it takes 3 turn overs to start the truck, never had this issue before. Drive to work and park it for 8 hours. Go to start up takes two turnovers and "Low Oil Pressure" messages quickly flashes on then off. I drive about 10 miles and the truck starts jumping/jolting on the highway cruise set at 75 (been driving 75 the whole 10miles).
Let it set for two hours, check fluids and start it up. I got the low oil pressure on first startup but then turn off and start back up no warning. Drove probably 2 miles ranging from speeds of 0-75, no issue.
Thoughts?
Thanks in advance!
So last week had a mis-fire code on cylinder 6. Sparks changed 4k miles ago. As a diagnostic measure, i swapped the coil on 6 with 5. Since then no issues, and this may not be related just wanted to be through.
This morning it takes 3 turn overs to start the truck, never had this issue before. Drive to work and park it for 8 hours. Go to start up takes two turnovers and "Low Oil Pressure" messages quickly flashes on then off. I drive about 10 miles and the truck starts jumping/jolting on the highway cruise set at 75 (been driving 75 the whole 10miles).
Let it set for two hours, check fluids and start it up. I got the low oil pressure on first startup but then turn off and start back up no warning. Drove probably 2 miles ranging from speeds of 0-75, no issue.
Thoughts?
Thanks in advance!
Last edited by bcan1ne; 12-18-2012 at 07:58 PM.
12-18-2012, 11:31 PM
#3
The motorcraft filters have a check valve in them that keeps the oil supply to the engine somewhat primed. Some of the aftermarket filters have inferior components and the check valve may leak back and I presume if its bad enough will cause momentary low oil pressure warning pretty much like right after an oil change. I would imagine that if that's whAts happening to you that you should also hear momentary chain rattle from loose tensioners at start up. As far as the drivability issue your experiencing at highway speeds that's likely related to that cop you swapped to the other side of the engine. The cop is beginning to go bad and not until a few more startup and cool down cycles will you start getting the misfire code on the cylinder you moved the cop to.
12-19-2012, 12:31 AM
#4
'08f150stx
Low oil pressure at startup may be eliminated by doing something as simple as putting a new oil filter on it. Motorcraft. Moving the cop to another cylinder is the way to narrow that misfire down. Why spend more $$ than you have to. Good advice!
12-19-2012, 08:13 AM
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More Info:
This morning the truck started up fine. I used remote starter so I didnt see if it posted a low oil pressure but it started up flawlessly it sounded.
New issue now is i can accelerate and my tachometer will show 2.5-3k and the truck stays stationary and then suddenly accelerates.
The jumping didnt happen at all during my highway commute but in lower gears any time i went to accelerate i had the issue i just mentioned.
This morning the truck started up fine. I used remote starter so I didnt see if it posted a low oil pressure but it started up flawlessly it sounded.
New issue now is i can accelerate and my tachometer will show 2.5-3k and the truck stays stationary and then suddenly accelerates.
The jumping didnt happen at all during my highway commute but in lower gears any time i went to accelerate i had the issue i just mentioned.
12-19-2012, 09:32 AM
#6
More Info:
This morning the truck started up fine. I used remote starter so I didnt see if it posted a low oil pressure but it started up flawlessly it sounded.
New issue now is i can accelerate and my tachometer will show 2.5-3k and the truck stays stationary and then suddenly accelerates.
The jumping didnt happen at all during my highway commute but in lower gears any time i went to accelerate i had the issue i just mentioned.
This morning the truck started up fine. I used remote starter so I didnt see if it posted a low oil pressure but it started up flawlessly it sounded.
New issue now is i can accelerate and my tachometer will show 2.5-3k and the truck stays stationary and then suddenly accelerates.
The jumping didnt happen at all during my highway commute but in lower gears any time i went to accelerate i had the issue i just mentioned.
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12-19-2012, 11:23 AM
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Mark
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12-20-2012, 07:30 AM
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Well looks like its not a COP.
Went to start it up after work yesterday and got "Transmission Malfunction" as well as P0720 (OSS sensor circuit fault), P0722 (Output shaft speed sensor no signal), and P2106.hrottle actuator control system forced limited power). Truck would sit and just rev in 1,2, and D.
First thing I'm going to look at is the OSS sensor, which in my research seems to very likely cause all three codes. Next thing may be to check the trans filter.
Sound about right? Any other advice?
Went to start it up after work yesterday and got "Transmission Malfunction" as well as P0720 (OSS sensor circuit fault), P0722 (Output shaft speed sensor no signal), and P2106.hrottle actuator control system forced limited power). Truck would sit and just rev in 1,2, and D.
First thing I'm going to look at is the OSS sensor, which in my research seems to very likely cause all three codes. Next thing may be to check the trans filter.
Sound about right? Any other advice?