P0300 CODE

1999 Volvo S70 • 5 cylinder FWD Automatic • 155,000 miles

Hi, we just recently purchased a 1999 S70 turbo. I keep getting a random misfire code.

During some acceleration and during some sustained RPM's the Check engine light will flash and then read as a P0300 code. While observing the engine under run when the code flashes the Fuel System 1 will display OL Fuel system Fault then OL fuel system drive. Then the engine will idle fine and the light will no longer flash.

I did change the spark plugs with OEM plugs. And cleaned the MAF. Any other help you can give me would be appreciated.
December 15, 2010.

Suspect fuel delivery problem have fuel pressure checked.

Dec 15, 2010.