Engine Performance problem
2003 Ford Taurus 6 cyl Two Wheel Drive Automatic 113000 miles
I have a 2003 Ford Taurus SES, 3.0L Duratec DOHC. It's running really rough. Started out just a slight hesitation upon accelerating, in less than a week, it began to miss. Replaced plugs, wires, coil pack, didn't fix the issue. It idles really hard and occasionally makes a loud popping noise like a backfire noise, under the hood. There's also a slight hissing noise, so I was thinking maybe a vacuum leak, but I can't find one. Took the IAC off, checked it out and cleaned it, put it back on the car and still had the same problem. I've thought, PCV, EGR, MAF. But I have no idea. If anyone has had similar problems and figured it out, PLEASE let me know.
Also, it's been running like this for a couple of months, but recently got so bad we had to park it. The problem with diagnosing this issue is that the check engine light has only appeared intermittently and doesn't stay on long. Took it to O'Reillys and had them check it and the codes it threw were po300, po301 and po316.
. Fast forward a bit.I've now replaced the PCV Valve and it seems to be running much more smoothly. BUT, now I hear an exhaust noise I didn't hear before. Out of the tailpipe comes a noise that sort of sounds like a muffled outboard motor. Recreating the noise via text, the closest I can come is " blub blub blub blub blub". Could this be the catalytic converter?
Saturday, July 25th, 2009 AT 10:58 AM