Engine Performance problem
2000 Hyundai Sonata 4 cyl Two Wheel Drive Automatic 155000 miles
Can you please tell me where the fuel line pressure valve is on a 2000 Hyundai Sonata? I looked up by the fuel rails and all over under the hood and can not find any valve on the fuel lines. My code checker says the fuel mixture is too lean, so I'd like to see what pressure the fuel pump is putting out, especially since its probably a fuel pump with 155000 miles on it.
Also, the car runs awful when its cold and once while I've had it, it cycled approximately 1,000 rpms (~1200 rpm to 2200 to 1200 then 2200 and so on) on its own, as many as 15 or 20 times when it was warming up, and then it stopped on its own. I never touched the gas pedal. It idles very rough but has plenty of power when warmed up for 15 minutes (which seems like a long time to wait for it to run decent). Are there any notorious Sonata or Hyundai problems I should be aware of that might help me fix this car? Thanks again,
Monday, June 14th, 2010 AT 7:02 AM