Question about 1998 Nissan Altima

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Oil pump been replaced, knock senser and oil sending unit. oil light comes on and load ticking ,when its cold started on my 98 nissan altima

After a few miles oil light goes out. ticking is gone. when i pull beside a building in the morning, the yicking sound bad. for a bout a few mins.

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  • 318 Answers

Go back to where you got the work done if you can.If not then i would get the oil preasure checked as the low light tells me the preasure is below 8 psi and the ticking is from the lash adjustors at the tappets verifys low preasure too.

Posted on Nov 27, 2012

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Posted on Jan 02, 2017

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SOURCE: 2003 Nissan Altima 2.5S, Check Engine Light Problem.

this problem could be caused by the mass air flow censor, i had the same problem with my car. it is really pricey at the dealer so you might want to check elsewhere for this part. I found one at a scrap yard for 85% less that the dealer and i also got life time warranty, the dealer does not offer any warranty on this part.

Posted on Oct 22, 2008

  • 740 Answers

SOURCE: 98 altima oil light on and off oil level fine car restarted and

If oil pressure is LOW this vehicle has a safety feature that will prevent vehicle from starting.(check oil level before you start) Now what I wan't you to do is to have the oil pressure switch checked or changed. This may be the reason why this vehicle is not starting or it can also be that the actual oil pressure is low. To check the oil pressure of the vehicle you will need an oil pressure guage. Remove the oil pressure switch and connect guage to oil pressure hole and check oil pressure while cranking vehicle.Some pressure testers can be connected to oil filter housing either is fine. If this vehicle has low oil pressure the reasons for that are bad oil pump, clogged oil pump pick up(from lack of oil change/poor mantainence) or bad connecting rod and main bearings but this usually have a warning from before (the engine will sound loud by knocking /clicking-tapping noise) It this was happening you may need to rebuild this engine or replace it. Good luck and Thanks for using FIX YA

Posted on Jan 24, 2009

co7196
  • 3433 Answers

SOURCE: 2004 Nissan Quest - Engine chatter/knocking

Ther e is a chance your injectors are leakin g down and there is excess fuel in the cylinders. Not a good thing. So, you fuel pressure and injectors need chkg. good luck

Posted on Jun 09, 2009

  • 8 Answers

SOURCE: Nissan Altima 2000 - Engine oil leaking problem.

replace the front oil seal. first i would clean the engine with purple power (degrease etc.) then look at the engine and make sure the leak is not coming from above like possibly the valve cover gasket or from the oil sending unit. try to tighten the bolts on the valve cover and even the oil pan. you never know, you may get lucky. i don't know where you are but front seals are cheap but the labor on the job is what costs you.

Posted on Jun 16, 2009

mustanglove0
  • 55 Answers

SOURCE: HOW TO FIX THE THERMOSTAT ON A NISSAN ALTIMA 98

thermostat should be at the end of the top radiator hose on the engine side.drain radiator most of the way to prevent coolant gushing out when you remove hose.unbolt housing replace thermostat.hope this helps

Posted on Aug 17, 2009

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1 Answer

2005 Nissan Altima knocking noise when engine starts.


By chance did you check your oil level. That would be ideal before your engine blows out. If that is fine, more in likely it maybe normal. Some GM vehicles do that also due to the cold weather. After sitting for a long period of time the oil will settle in the oil pan til you crank up. The knocking noise may last for 5-10 sec then it stops because the oil is lubricating the pistons again. But if it is constant and oil level is good, get a mechanic to check it out. Hope this helps.

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Hello,
There is a possibility that the old motor was not burning properly and you have carbon build up on the O2 sensers. A poorly functioning O2 senser will not allow the Fuel/Air mixture to work as you give it gas under load. You could have multiple O2 sensers too.

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Where is the oil sending unit located on a 1999 nissan altima?


Not exactly sure about 1999 model but It's usually located next to the oil filter with a wire coming out of it or with in the oil drain area. It's about $12 to replace.
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My oil light comes on after the engine warms up and stays on the entire time i'm driving. We've changed the oil and filter and keep a check on the levels but the light continues to come on. Any...


you may have a bad oil sending unit the oil light works off of oil pressure i would start by changing the oil sending unit and if the light still comes on then you have bigger problems. get a mechanical oil pressure gauge and hook up and check the oil pressure after the engine has warmed up to operating temp you should have at around 30 psi but can survive with 10psi but might be time for a rebuild. if no oil pressure then you might have a broken shaft between the oil pump and the distrubuter. if the engine is running and not making any out of the normal ticking, knocking sounds probably just the sending unit though, they are about 25 dollars and i believe its right above the oil filter on the 6 cylinder.

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1 Answer

Engine knock hard over 2500 rpm


Does the oil light come on or the knock occur during the engine warm up after a cold start?
There could be a couple of problems causing the issue. You could have an oil pressure pump or pump pressure regulator sticking. I would have a mechanical oil pressure gauge installed and verify oil pressure at idle and 2500 rpms to make sure oil pressure is in normal ranges.
You could also have excessive piston rod bearing, crankshaft bearing or cam shaft bearing wear that will cause oil pressure to drop too low to prevent the rod knock your hearing at 2500 rpm.
You said a knock and not a ticking noise,so I don't believe a lifter is the issue at 2500 rpm.
Start with the oil pressure check and go from there.
Let me know.
Regards,

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I have a 95 nissan altima and the oil ligth stays on for 15 seconds when its cold but then gos of, but then on stops lights it blinks.


1st I have to ask, it the oil clean and full, with a new filter? I know, it is. Just have to make sure.
2nd There is a sending unit for that vehicle that may be malfunctioning.
3rd you may have a weak oil pump. The only real test for this is to have your mechanic tap directly into the sending unit port with a manual oil pressure guage.
Obviously if the pum is bad it will need replacing which is unfortunately a costly venture.

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98 altima oil light on and off oil level fine car restarted and


If oil pressure is LOW this vehicle has a safety feature that will prevent vehicle from starting.(check oil level before you start) Now what I wan't you to do is to have the oil pressure switch checked or changed. This may be the reason why this vehicle is not starting or it can also be that the actual oil pressure is low. To check the oil pressure of the vehicle you will need an oil pressure guage. Remove the oil pressure switch and connect guage to oil pressure hole and check oil pressure while cranking vehicle.Some pressure testers can be connected to oil filter housing either is fine. If this vehicle has low oil pressure the reasons for that are bad oil pump, clogged oil pump pick up(from lack of oil change/poor mantainence) or bad connecting rod and main bearings but this usually have a warning from before (the engine will sound loud by knocking /clicking-tapping noise) It this was happening you may need to rebuild this engine or replace it. Good luck and Thanks for using FIX YA

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