i have a 1991 pontiac grand am my oil pressure keeps dropping when i'm idioling and my check gauges light comes on but when i press the gas it goes back up i've had my oil and filter changed twice within a 1000 mile period if anyone has any ideas please let me know
2007-02-26 11:29:32 · 11 answers · asked by nickki f 1 in Cars & Transportation ➔ Maintenance & Repairs
also when i hit the brake it does the same thing i talked to my friends husband who is a machanic he said he does'nt think its the oil pump he thinks its the some kind of rings or something like that!! he told me to put a heavier grade oil in it
2007-02-26 15:26:39 · update #1
try a new oil pressure switch, my grand am does the same thing except the light doesn't come on, sometimes driving down the road my light will come on saying check gauges and the oil light will flash and you look at the gauge and there is 40 lbs. of pressure.
2007-02-26 11:38:48 · answer #1 · answered by mister ss 7 · 0⤊ 0⤋
Sometimes, but not rarely an oil pump will start to fail and go bad, but hopefully that is not the case here.
I would pour one quart of transmission fluid in your oil case and run it for a couple of hours and then change the oil and put a new filter and oil change in the works.
The trans fluid will eat up all the film deposits and help free up the screen on the oil pump./ It also cleans your lifetrs and valves...cool eh!!
If you have a rear main leak it also stops that too oif you have a rubber seal. All of these are tricks of the trade.
2007-03-04 13:55:44 · answer #2 · answered by Anonymous · 0⤊ 0⤋
We don't have enough info however it would be wise to have the pressure tested mechanically. There is a test gauge set up out that will give you a true reading. Some gauges get old and don't read accurately. Don't take any chances, engine swaps are very costly. Good Luck. P.S. If you don't know of a shop you feel you can trust call your local Better Business Bureau for advise.
2007-02-26 19:37:12 · answer #3 · answered by Rick D 2 · 1⤊ 0⤋
how many miles are on this engine? It sounds like the oil pump. dont put in a heavier grade of oil. you want your oil to flow free. like others said it could be oil sending unit. its cheap to replace try that first.
2007-03-05 23:16:22 · answer #4 · answered by Tom M 1 · 0⤊ 0⤋
if this is a v6 engine they were real bad, about sludge build up in the heads,,, which means the oil is trapped in the top of the engine..an is real slow to drain back to the oil pan,, causing the engine to starve for oil..it will eventually destroy the crank
2007-03-06 03:49:48 · answer #5 · answered by walkn ford 1 · 0⤊ 0⤋
Unfortunately, thats a symptom of a pump thats going...have them put a pressure gage on it to make sure.
2007-02-26 19:38:36 · answer #6 · answered by Michael B 6 · 0⤊ 0⤋
oil pressure sending unit...but problably the oil pump itself is worn out
2007-02-26 19:37:23 · answer #7 · answered by Michael K 5 · 0⤊ 0⤋
you have a bad oil pump
2007-03-06 15:50:29 · answer #8 · answered by nbr660 6 · 0⤊ 0⤋
It could only be the oil pump.
2007-02-26 19:34:57 · answer #9 · answered by Anonymous · 1⤊ 1⤋
HOW MANY MILES ON THE CAR? IF ITS HIGH I WOULD PUT IN A HEAVIER OIL. BECAUSE I HIGH MILE CAR THE VALVE SEALS WILL START TO LEAK,PISTON RINGS START TO ALOW BLOW BY.
2007-03-04 00:09:13 · answer #10 · answered by norman f 3 · 0⤊ 0⤋