Ford - Explorer :: 2002 - Oil Pressure Occasionally Go From Normal To No Pressure Immediately
Jul 31, 2006
I have a 2002 ford explorer with 70000 miles on it. The problem is that the oil pressure occasionally go from normal to no pressure immediately. Then within a minute it pops right back to normal. It has happened when I first crank up and sometimes just going down the interstate at a normal speed. My fear is that the oil pressure is really gone and there is a pump problem but with it either working or not I fear it could be a sensor problem.
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I am working on my friend's '02 Explorer 4x4 with 4.6L engine with 122k on it, the dash is telling him that he has low oil pressure. When it first came on he was an hour away from home, what he told me he did was pull over and checked his oil level right away. He found that it was still full and since the engine wasn't making noises he resumed his trip home. During the drive home he said the dummy oil pressure gauge would read normal then drop all of a sudden then come back up again after so long.
When he got back home he changed the sending unit plus the oil and filter and his Explorer still reads as if it has no oil pressure. The needle does not read anymore, he noted to me when he pulled the filter off it looked like it did not have the normal amount of oil inside it. I did not get to see it so I can not verify that. When he starts it it kind of sounds like it has to fill the filter every time like a fresh oil change, rattles around for a second then smooths out and sounds good..
So is his oil pump to blame for the light being on or is there something wrong with the gauge in the cluster? I have not hooked a mechanical gauge up to where the sending unit threads into so I don't know how much pressure it actually has. If not the oil pump what could be the cause? My other friend and I looked at the oil that came out of the new filter and we thought we saw metal specs in the oil. Is it new engine city time? It has such low miles to need an engine.
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I have a 02 explorer XLT with the 4.6L and the oil pressure gauge has never worked (the three years I have owned it) I did an oil change yestarday and replaced the sending unit thinking that was the problem but the gauge is still not working. What other problem it may have? 4x4 light flashing (instrument panel looks like a xmas tree)...
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My factory gauge on the dash reads Zero. I have put on a mechanical external gauge and it reads normal.
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Got a 1986 Ranger 2.3 EFI 5 speed that I have owned since it was almost new and will never let it go. 290,000 mls and still running strong "except". Noticed the last couple of months that when I start it cold it fires right off. If I start it hot it always takes 3 tries and always goes on the third try except....on occasion it will not start at all. It is random and after I let it cool a bit (about 30 min) it will start. Over the years I have replace many of the fuel system components (fuel tank pump, high press. pump, inline filter and canister filter, fuel press regulator) but wondering what else might be the problem.
I put a pressure tester on it the other day and when I selected the key to start the pump would spool up to build pressure and shut off. The press gauge would register that but the pressure would immediately go back to zero. After start up it would hold a constant 30psi at all rpm,s. Shut the engine off and pressure drops right down to zero. Shouldn't the system hold pressure for at least a while after shut down? Could this be the problem with my sluggish starts? What would be the normal fuel pressure? Can't seem to find it in my Haynes manual. Once running it runs great.
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I have a 2008 Audi A4. Today while at a stop light, suddenly, the 'check oil pressure' light came on. Immediately after the car died. I tried to restart to no avail. After pushing the car to a safer stop, I checked the oil level. It was perfect. I let thecar sit while I did some quick research on my smartphone after which I tried again to restart. The car was as if the starter was dead. It did not turn whatsoever. Next, a warning light came on to 'tighten fuel cap', which was completely secure. Then, a warning that my headlights were misaligned. I started checking fuses....all fine. The cars fan started and the check oil pressure light came on again. The car still will not turnover whatsoever, however, everything else works fine; lights, radio, fan, etc.... So, I called the dealer and theyre clueless unless they hookup the sensors.
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Twice in the last year my 1999 Ranger (@138,000 miles) has started running very loudly: I checked dash and see oil pressure gauge says no oil pressure. First time this happened, I pulled over, had it towed. At garage they start it up: gauge normal, they check oil says its OK. I take it to the dealership, they replace sending unit, but can't explain why it was running loudly. Today same thing happens: I checked oil pressure gauge, it's OK. After an hour, starts running loudly, gauge in red. Park car for 15 - 20 minutes, start it up: all is well: gauge OK, running quietly. This is amy 'spare' car, so it only gets driven 1 -2 times per month, short distances.
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Question about the oil light. On a cold start the oil pressure light goes out immediately.
After driving around for a while (engine warmed up) and shutting off the engine for anywhere between 45 to 60 minutes or so and then starting the engine again, the oil light will go out immediately, but then SOMETIMES, pop back on, MAYBE flicker, then stay off. This all takes place in less than a second, almost a microsecond. This is all very intermittent too, No rhyme or reason as to temp or time between starts. Engine is very quiet, except for a COLD start (over night). I use 5-20 and it makes no difference whether using conventional or synthetic.
I change my own oil, but dealer did it once and I still get the same issue. I suspect the sending unit, or is this 'normal'?
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What the normal tire pressures are so the TPS will not alarm? The sticker on the door says 65 front and 80 rear for my F-350, but I think this is a bit high when empty or not pulling trailers, etc. Additionally, is there anyway to adjust the TPS settings?
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The oil light on my 2015 Camry LE turns off immediately after I crank the engine, and half a second later goes back on again for less than a second. I showed this to the dealer and they said it is normal; however none of my other cars did that. Perhaps the factory filter is bad and needs to be replaced? It does it only if the car sits for a while. If I turn the engine off for 10 minutes and turn it back on it does not do it, which tells me that perhaps anti-drain valve is bad...
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My friend has an 08 4.6. He has replaced the thermostat with 3 different ones all with different temps, still nothing. Temp gauge reads normal but after driving it for a bit he can take off the radiator cap while it's running and not get sprayed in the face with coolant, almost like there is no pressure in the system.
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I've just bought a used 2002 Explorer Sport Trac (Automatic) 120k+ odo and what I've noticed whenever I shift from Park to Reverse or to Drive it takes about 3 seconds before I feel a slight jerk moving forward before I can step on the accelerator for the vehicle to move backwards or forwards but if I step on the accelerator right after shifting to any gear except Neutral it won't run immediately as if the clutch is disengaged and after about 3 seconds it will suddenly engage. Is this normal or is there something wrong with the transmission?
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We have a 2.4 t. S60 lately my wife says the low oil pressure message comes on, occasionally. Checked the oil level, it's good. Cars maintain e has been done regularly since new. One friend says the oil pan gasket has been known to loose it seal. He thinks I should change the gasket. The car sounds good and has this occasional problem for about a week.
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What tire pressure are you running on your 08 R32? The door jam label says 39psi, but that just gives this car a bone jarring ride. Can I get away with 34-35psi?
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'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?
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I had new nitto snows put on my truck and low tire pressure light is on.....Checked tire pressure 65 front and 80 back.....Started truck and screen said tms pressure low.....Hit ok and drove around on and off for 2 days now and cant get the light to go out......Is there some way to get the light out or do I have to go to my dealer to have it reset???
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Last 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.
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My truck gave me low fuel pressure and reduced pressure limp mode at 21,000 miles. The fuel and air filters were changed at 16,000. The dealer said all they found was the fuel filters (at 21,000) were what needed to be changed. Also, why does my truck hum??
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1995 Ford Explorer, 4 ltr. engine, pushrod. Will not start. Replaced fuel pump, fuel filter, every relay, pressure regulator, and the crank position sensor. I realize there's a whole bunch more parts under the hood, but I am ready to give up. Before the fuel pump would not run. Reason for replacing the parts. Now it won't stop running and you can feel the fuel by-passing at the pressure regulator. When checking the pressure at the rail I get zero !! I used a tire pressure tester for this. And, like I said no pressure. This vehicle has around 170,000 miles on it.
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1991 Celica ST 4A-FE automatic, 238,000 miles, son's car, has been running great, until he says his oil light occasionally flickers on him. Car is in Wisconsin, driven maybe 2 miles one way to work every day, hasn't been on the highway is a couple months. Has synthetic 5W-30 oil with about 2,000 miles since last change.
Brought the car into the garage. Sure enough, after engine warmed up and idle got below 1,000 RPM, oil pressure warning lamp would come on. Engine sounded normal at idle and fast idle. Tough to put a mechanical pressure gauge on this engine (after to remove the alternator and A/C compressor and bracket, per the service manual, to access the oil pressure switch). I drove it on the highway, put about 40 miles on it, ran great, until I exited the highway. Anything below 1200 RPM, oil pressure warning light would come on.
Came home, removed the oil filter with intent to change it (to make sure it wasn't plugged). Smelled of gas. Oh-Oh. Drained the oil (oil level was at full mark, unusual for this vehicle, normally would be 1/2-quart low after 2,000 miles - 2 months of winter driving). Oil came out with consistency of water. Smelled of gas, and could see water droplets as I switch the drained oil from a collection pan into a jug. Thought was many short trips caused oil to never get hot enough to burn off unburned fuel blow-up or accumulated moisture, so oil was diluted, much too low viscosity.
Changed oil & filter with synthetic 5W-30 & Purolator PureOne oil filter. Took it back on the highway for 40 miles again. Highway drive was fine. Upon exiting, oil pressure warning light came on at 1,600 RPM or below. Oh-Oh. Had another 40 miles on the highway to get home. Highway drive was good again. Upon existing, oil pressure warning light came on again at 1,800 RPM or lower. Oh-Oh.
Worrying that the oil pump for pressure by-pass valve or of bearing spin-out or extreme wear (although engine sounded fine all the time), decided to order an OEM oil pressure switch. Had to take some of the bolt-ons off to access the oil pressure switch, but not all the service manual said had to come off. Took the old oil pressure switch out - looked just fine. Installed the new one, put everything back together. Checked to make sure the oil pressure warning light still came on with key in the ON position (it did), so I knew the wiring connections were good. Startup was fine (cold engine). Took it on the highway for 40 miles, after exiting highway, no more oil pressure warning light. Even tested the situation with the automatic in drive, brake applied, lights on high-beam, heater fan on high, rear window defroster on (got the engine down to 600 RPM), still not oil pressure warning light. Turned engine off, then turned ignition key to ON, oil pressure warning light comes on like it should.
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I am on my 3rd engine in this car (known issues unfortunately) and for the past few weeks have had problems with the engine feeling like it is quickly cycling through normal and 'losing pressure' at MPH over 40 when gas is going into the system. Mechanic replaced oil pressure sensor but problem recurred on next drive and AC cooling went out at the same time.
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