Losing power after 300kms
Hi all, me and my wife have been travelling round Australia in her 2001 elantra GL. The car's developed a weird problem. After driving about 3 hrs we lose acceleration. It feels like fuel starvation. I found recently that when the problem occurs, if I turn off the ignition and restart, she goes back to normal running for 10 minutes or so and then starts playing up again. If we pull over and switch of for half hour or more she's good for longer. Should I be checking the fuel tank or filter? How can I check for fault codes on the ecu? I've tried opening the fuel cap to see if she's breathing ok and no change. Any ideas?