5.4 blinking oil light, gauge does same
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Joined: Apr 2004
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From: PA
5.4 blinking oil light, gauge does same
01 f150 w/5.4. This morning was pretty cold. As soon as I started up the oil gauge came up to pressure (always in the middle of the range) then dropped to nothing and the oil light came on. 10 seconds later the pressure came up, light went out. 10seconds later it dropped to nothing and light came on. Is the gauge and light on the same sensor? I would think the gauge is electronic. I didn't get a chance to check the stick as I was late for work. I drove the exploder instead. I have 38,000 miles on it and never had an oil problem. What's my deal?
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Joined: Dec 2001
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From: Louisville,Ky.
They use the same sender. If you have over 7psi of oil pressure, the gauge will read about 1/2 way up and the light will be off. It is really a dummy gauge that doesn't read pressure, just that you have enough to keep the light off.
I would try a sending unit first if the engine isn't making any abnormal noises.
It is located next to the oil filter on the filter adapter.
I would try a sending unit first if the engine isn't making any abnormal noises.
It is located next to the oil filter on the filter adapter.
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From: PA
(Where's the sender?) was my next question, thanks for telling me in advance. I checked the stick and it was full. So I started it later in the day and let it run. The gauge came up and the light went out. I stalled it and the gauge stayed at the middle for a good 30 seconds before it dropped. So it must be the sender since it told me it had pressure when the engine wasn't even running.
I posted a couple of weeks ago and said I changed oil and noticed it was very black and had a burning smell. Now after 1000 miles the new oil is very dark again but not too much of a burning smell. Also the TB looks dark and greasy inside. Shouldn;t it have more of a dry carbon look to it? Thanks for your help on the light. I drove it to work and it did not seize.
I posted a couple of weeks ago and said I changed oil and noticed it was very black and had a burning smell. Now after 1000 miles the new oil is very dark again but not too much of a burning smell. Also the TB looks dark and greasy inside. Shouldn;t it have more of a dry carbon look to it? Thanks for your help on the light. I drove it to work and it did not seize.
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Joined: Dec 2001
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From: Louisville,Ky.
Probably wouldn't hurt to use an engine cleaner like Seafoam or something on your next oil change to help clean out the engine.
The oily residue is partly from the EGR valve and partly from oil vapors from the PCV valve and possibly a little blowby from the rings.
I would go ahead and install a new PCV valve just to be safe.
The oily residue is partly from the EGR valve and partly from oil vapors from the PCV valve and possibly a little blowby from the rings.
I would go ahead and install a new PCV valve just to be safe.
