Surges when driving wants to die at stops oil pressure drops to almost zero
The first thing to check is a dirty EGR valve, next coolant temp sensor, TPS, converter. Bad O2 sensor usually sets code.
SOURCE: Oil Pressure Drops While Driving
your oil pump is either weak or there is sludge i9n the oil pan. my adives is to have the oil pan dropped . chances are sludge is the culprit. as the oil get's warm the pressure should only drop slightly but pressure is generally dictated by engine rpm. pumps are gear driven so if it was a bad pump your oil pressure would start out very low at start up.
SOURCE: 1997 Eagle Talon TSI AWD oil pressure goes from zero to normal and back
Te 1st thing to do is replace the oil pressure guage sending unit, most times that is the problem, if press remains low use a mechanical test guage to verify what the oil pressure is, hook this tester up at the port the sending unit is screwed into.
SOURCE: After 15-20 minutes of driving
i had same problem and its just oil pressure sending unit its above oil filter just check it if you got some loose wire or somthing .........my problem was ;i had oil in conector i clean it and works jyst fine
SOURCE: 1992 gmc chevy 350 wont idle when warm
This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.
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