Skip the auto shop - Our mechanics make house calls

Q: Oil Pressure

asked by on

I have procured a RSX Base K20A3 (MT), Car has a P1259 (VTEC malfunction) code and will not see past 4K revs (LIMP). Changed oil to Mobil 1 5-20 as per OE specifications. (Previous owner claimed to put 20-50, for reasons unknown at the time, but now I think it's clear).Red Oil light stays on during cold start for about 3-4 seconds longer than I suspect normal, and intermittently 'flickers' between shifts or when revs go below 500. After warm-up, it's not as frequent for the light to 'flicker'. Suspected low oil pressure and proceeded to check with mech. gauge. Took off VTEC solenoid to gain access to oil pressure sensor below, uninstalled switch and installed gauge and VTEC solenoid.Upon start up, gauge climbed just over 10psi at idle. According to OE specifications that is correct. But, upon diagnosing the 3k Revs minimum (44psi), the needle barely moved if not but only to 15psi at one or two occurrences. I am suspecting a worn or bad oil pump at this point or bearings.

My car has 176000 miles.
My car has a manual transmission.

A: The oil pump may be the reason for the loss...

The oil pump may be the reason for the loss of pressure and it should be removed and checked for proper end play and excessive wear. I would recommend replacing the pump, and while the oil pan is removed, inspect the oil pan for any metal particles that could point to a problem with the bearings. When you removed the oil pan drain plug, look for metal on the plug magnet and also drain the oil through a metal strainer to see if any larger metal particles are in the oil. If you find metal in the oil or you put an oil sample on a white towel, look for metal in the oil. If any metal is found, then the oil pump may not be the only problem and the bearings in the engine are bad. If you are still having trouble, a certified professional from YourMechanic can come to your car's location to diagnose your Oil Pressure Light and recommend the best path to repair for this issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Hesitates and jerks

Hi there, thanks for writing in. I'd be happy to help. This is a common sign of a faulty mass airflow sensor or throttle position sensor. The mass airflow sensor regulates the amount of air that is mixed with the...

Q: Car not starting due to clutch

The switch is there for safety reasons and should under no circumstances be bypassed. It keeps the car from starting if the clutch pedal isn't being stepped on. The last thing you want it for you or someone else to...

Q: Battery Light

Hi there: In most cases when the battery light comes on, it's an indicator that the alternator is faulty or starting to show signs of wearing out. If this occurs only when the RPM is revved high, it might be...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.