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Old engine tend to wear piston ring in time,if you use wrong viscosity grade oil ,during idling the oil could not reach all moving parts because there is no enough oil pressure in the system,try 30/ 40 oil grade .
Hi JESSE,HERE'S WHAT IT SAYS ABOUT THE IDLE CONTROL VALVE,AND HERE'S A LINK TO THE PART.
Regulates the amount of air entering the engine during idle
When not replaced, vehicle could experience high or low idle, engine dies at idle and/or severe high idle possibly causing internal engine damage and safety issues.Here's a link to the idle control motor.
you must have a OBS2 scan and get the code for further help.
it can be a number of things. go toautozone and see if they will scan it for you
as of the oil light when your engine Begin's to stall it will cause it to come on.
post some more info when you get the scan
Well i hope its not the oil pump because the oil pump works with the speed of the engine when it turns and as you know when the engine turns fast the oil pump turns fast too and the more you accelerate the faster the oil pump turns, that means there is more pressure of the oil to go up top the engine and when the engine idles, The pump turns slowly, and doesnt pump enough oil up top the engine and the oil pressure switch dosent detect any oil passing by then it send a message that the pressure is low. So check your oil pressure during idle. Good luck Bro
You probably spun a bearing. My wifes 2000 ford mustang did the same thing she never checked the oil and she said the oil light would come on briefly and oil empty filled back and knocking during acceleration and idle tore apart motor and there were three spun bearings.
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,
It's normal for the oil pressure to fall off at idle as it gets warmer because the oil gets thinner. It should operate between about 20 and 60 lbs. If it drops below 10 lbs at hot idle, you may have some bearing wear or a worn pump.
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