I have a 1999 ford taurus 6 cyl 3.0 engine. I noticed that in the engine on accelleration in the 2-2.3k rpm range there was a slight chirpy/rattle sound comming from the engine compartment after it warmed up (about 5-10 minutes of driving). Also when I would come to a stop, at a light, or stop sign, my oil light would flash. When I let go of the brake, and the rpms got to about 6-700, it goes away. About 3 days after that I noticed that the chirping sound was much more prominent after the car warmed up on acceleration. On the highway (95% of my drive time in this car) if im at 65 mph and I let it coast with foot off of the gas, the chirping/rattling would continue almost in a pattern. When I resumed acceleration, the sound got louder.
Today, same issues with the car, but more info: when I slow to below 1.5-1.6k RPM, the noise disappears. In regular city driving if I go above that 1.5-1.6k rpm, the rattle is there, but slight, not as loud. Oil light hasnt come on as a result of just driving city miles. Only with highway miles does it occur. Plenty of oil, no leaking there. Belt looks good, no cracks on the smooth side, and none on the grooved side. Engine has coolant, and does not run hot.
I had tried replacing the spark plugs because I thought they were bad, but that has done nothing to help with the issue.
Any advice you can give would be greatly appreciated. Im no professional, as you can tell by my troubleshooting, or lack thereof. I thought maybe oil pump/sending unit/pressure sensor may have an issue? Well, ill leave that to the pro's.
Thanks for reading.
Wednesday, June 8th, 2011 AT 2:44 AM