'97 F150 4.6L 4wd automatic... My gauge jumps around, sometimes it works and other times it shows no pressure. Could that be the oil pump? Or is the gauge most likely bad? Whats the actual purpose of an oil sending unit?
View 6 RepliesI changed the sending unit and replace the oil filter with a motorcraft unit and still can't get the oil gauge to read pressure. Since it is a gear oil pump I don't believe it is the pump.
View 2 RepliesI have an 01 F150 Lariat Supercrew 4x4 with the 5.4 Triton. The truck has 222,000 miles on it. Recently, I have noticed that when I am stopped at a stop light/stop sign while in gear, the oil pressure gauge drops to zero and the light comes on. As soon as I let off the brake and give it gas, it pops back up to normal. While driving, the needle never moves and stays consistent until I stop again, and back down to zero it goes.
If I put the truck in Park, the pressure goes back to normal. Same with neutral. It seems it is hit or miss and does not do this all the time, but I just wanted to see what your thoughts are. After doing some research I am leaning towards an oil pressure sensor/sending unit.... The truck runs perfectly fine, I just want to make sure it is not something more serious.
2002 F150, 4.6 V8, 140k miles. Oil level good, oil was changed 2 months ago.
Driving along one day, out of the blue oil pressure light comes on, oil pressure gauge went to zero.
Engine did not run hot, no bad engines noises that I can hear.
Upon restart, oil pressure will be up on the gauge for minute or so, then goes to zero and oil light comes on.
Asked around, some say oil pump, some say oil filter or pickup tube.
Just recently got a sweet deal on an 01 Lariat with a very low mileage 5.4L. I almost didn't purchase it because the oil pressure gauge will not read when you start the engine. Sometimes it will sometimes not.
When it does read, it is just past half which is the normal reading. When it doesn't read, it shows zero and the light is on. The engine runs fine either way, and the previous owner said it has been that way for years. The engine has been well cared for, and has been running Mobile 1 full synthetic for most of the 80k miles. The oil was not overly dirty at purchase, so I figured it to be a loose connection. I suffer from the cold solder joints that these trucks are plaqued with, as evident by the intermittent odometer reading. Do you think the oil gauge issue is the same thing? A cold solder joint? Or should i just start with a new sender?
My launch scanner reported a bad oil pressure switch, but I've replaced that, and when I did the oil pressure light went away, but my gauge still didn't work. Could it be a faulty switch? Or is it common for gauges to stop working on these fords seeing how there's a resistor to trick the gauge from the factory anyway? If I smack my dash the gauge will raise and lower. But I think that's normal.
View 7 RepliesStarted the morning with oil pressure gauge dropping to 0, gave it a few minutes checked oil, it was fine. Restarted truck, pressure went back to normal. Drove about another 30 miles pressure gauge would drop but would rise when hit accelerator. I was driving about 60mph, gauge went back to 0, check engine light came on and within a matter of seconds, a whining noise started, pulled over before i could completely stop, it died, and now won't crank.
View 6 RepliesLast week I was driving on the highway and noticed the oil pressure gauge showed no pressure. Limped a half mile to the mother-in-laws and called for a tow. As my truck was pulled onto the flatbed I could see oil all over the bottom of the engine, tranny, rear end, etc. Turned out to be a bad oil pressure sender, which was leaking enough oil to blow the plug off the top of it.
I replaced the sensor, cleaned the engine and under-carriage, checked oil level (which showed no loss of oil) and drove around for a week without an oil pressure gauge while I waited for a new pigtail. Put the pigtail in yesterday and drove it today for the first time since. Gauge was working, got to the bank and it was reading zero pressure again. Limped home and watched the gauge go back up quickly and then back down. This happened twice and was showing pressure when I shut it off. Checked under hood, no oil leaks and plug is still secure.
The tire pressure warning light has been on in my car for about a week. The dashboard computer says that the tire pressure in the front right tire is 17 psi, but when I use the pressure gauge, the reading is almost 40 psi. Is this something I should be concerned about? What could be causing this problem?
View 16 RepliesOK so here is what is going on in my world. I have an '03 F-250 6.0 Crew Cab 4x4, with an Edge programmer and 4" MBRP exhaust. About 3 years and only 20,000 miles ago I changed out the HPOP, O-rings on the rails, all new O-rings on the injectors, blue spring in the fuel pump, IPR valve, EGR valve and a number of other new seals in my high pressure system. The truck has run great since then. I cleaned out my turbo about a year ago and it has been like new.
Now for the fun part. About a month ago it has been cranking a little longer when hot than it should, but not too bad. About 2 weeks ago even though it starts fine in the morning, it is just completely gutless out of the driveway until about a block away the turbo spools up strong and it runs great. It has run perfectly during this time once it is warmed up a little bit. Saturday it left me stranded in a parking lot cranking with no start. It had been sitting for about 2 hours.
I got towed home and plugged in my SGII and it shows my ICP at 345 when cranking hot. Once cold it starts up and runs great, but won't start again once hot. I changed out my IPR valve with a used one that I had on the shelf that I took out when I did my HPOP. No change. The FICM has 47 volt while cranking and 49 when just ign is on. Batteries are very strong and it has a new starter. When cranking the low oil pressure comes up on the gauge. Not sure where to start and I am frustrated. I have had this truck for 9 years and it is in great shape. It only has 138,000 miles.
I need to install an oil pressure sensor sending unit. I've already occupied the 1/8"NPT test port on the rear of the oil cooler, where else might I be able to tap into oil pressure? (LPOP)
View 4 RepliesI bought an Autometer 4763 gauge that didn't come with the correct fittings to plumb the sender into one of the extra ports on the back of the bowl. I went to the Ace hardware store right across the street and they didn't have anything (not surprised) and then Napa. They couldn't find a fitting to match either. He found that the plug threads are 7/16 20 tpi and the sender is 1/8" NPT. He suggested getting a 7/16 20tpi bolt, drilling it rifle-style, and then tapping it for a 1/8" NPT. The alternative, and what I ended up doing, was to use brass fittings to tee it off one of the supply lines to the heads. I ended up going that route but wanted to know if I should have looked harder for the right fitting.
Here's a pic of what I have now. I've test fit it, and it seems to work although I will need to insulate the hard lines because they rub due to the offset.
Looking for pics of where/how they mounted their fuel pressure gauge? I'm getting ready to install one.
View 11 RepliesI Have A 2001 Ram 1500 With The 318 5.2 Engine , Oil Pressure Jumps From 40 To 0 For No Apparent Reason, And Then Lifters Began To Tick. Turn Off Truck And Recrank Oil Pressure Returns To 40 Lbs, Rev Up Engine To 2000 Rpm Or Better And Pressure Goes To 0 Instantly. I Have Replaced Sending Unit, Replaced Oil Pump And Pickup, Changed Oil And Filter Using Dodge Filter, Removed Valve Covers And Intake Cleaned Out All Sludge, Tried 3 Different weights Of Oil, Cleaned Oil Passages, Inspected Oil pump Drive Shaft, Pulled Rear Main Cap And Inspected Bearing , Looked Good, Changed Oil And Filter 3 Times , Engine Is Very Clean. Engine Never Has Low Oil Pressure Either 0 Or 40 Lbs Never 10 Or 20. I Have Heard Others Describe This But Never Heard The Answer . Truck Has 70,000 Miles ,runs And Sounds Perfect When Oil Pressure Is At40. It Can Idle At 40 Lbs Hot, Which Leads Me To Believe Bearing Clearances Are Fine.
View 14 RepliesMy TPMS display shows everything ok but with pressures = 0. VAG-COM shows everything is ok, with each sensor showing a non-zero pressure matching my own manual readings. The controller self-diagnosis didn't show any problems. I've rebooted the car a few times, to no effect. Should I initiate a learning cycle?
View 9 RepliesI have a 2003 4.6l f150 164000 miles. While back oil pressure dropped to 0. Then chattering. Then up then down. I changed the oil and filter, then flushed the motor, then changed the oil and filter again. 1500 miles, no problems, no chatter. Then all of a sudden it happens again. Oil level good and clean. Oil pump?Pick up tube?
View 10 Replies2003 Trailblazer 4.2... Two times now, like every other start oil pressure gauge is 0. The engine runs fine, oil level is fine, thinking of replacing pressure switch, ie sending unit after checking connections of course
. Was curious this is a simulated pressure gauge as I read on some other posts?
Supposedly the gauge unlike the stepper motor I need to replace for the speedometer is actually voltage controlled by a circuit board in the cluster.
i have a few...
1. the max pressure on my tire is 44...my gas cap tells me otherwise...which should i follow?
2. i have a 2001.5 passat and the manual says i need a 91H load/speed rating...the tires on my car are 89H...what problems might that cause?
i keep all 4 tires inflated at 30 psi and check them every week...despite that i have uneven tire wear on the outsides as if they are underinflated...i am inclined to think that i got ripped off with my tires...what do yall think? i also regularly align, balance, and rotate my tires...
I am installing a fuel pressure gauge into my 02 7.3 I went to the thread the sensor into the plug hole on the fuel filter housing and it wasn't threaded, turns out the sensor thread is slightly smaller and a different thread ... The directions say to install it into the filter housing or the lift pump ... So I'm assuming I have to go the lift pump direction of installing it but where the lift pump is or how to install the sensor into it while not throwing a code or causin problems ... A step by step and even pictures.
View 14 RepliesI am having an oil pressure issue on a 2000 F-150, 4.6L.
I recently put a new set of heads on the motor because of some valve damage. Anyways. The oil pressure gauge in dash would sit at around 3/4.. Drive it a couple miles and every time you would get back to idle (stop sign) it would drop to zero and the light would come on.
You could also hear it make a little noise like the top end wasn't getting oil. (Didn't run at idle long..) I figured it was obviously starved of oil so I put a new oil pump, timing chains/guides/tensioners on. (Which I probably should have done with the heads.) Same issue resulted, but no funny noises when the gauge drops off.
Suspecting that the sensor may be faulty and the dash gauge being useless anyways, I dug an old mechanical gauge out of a box and installed it. I'm getting similar oil results. (Under 25psi it seems.) I'm not sure if the gauge has just gone to crap over the years of being in a box. However, the previous low-oil pressure issue seems to confirm it's not the gauge.
I cleaned the oil pickup when I had the motor apart. It didn't seem dirty, but I sprayed it out regardless. The motor looked fairly fresh when I had it apart. Bearings looked solid, cylinder walls even looked freshly honed. From what I hear, the motor was a low-mileage replacement.
So what could cause a low-oil pressure issue? Bearings seem fine, oil pump is brand new.
How do you get to the oil pressure switch on a 1998 F150 4x4? I can see it over the top of the front axle but can't find any way to get my hand in to unplug the sensor wire. Do you have to unbolt and drop the axle down a couple of inches?
View 2 Replies