The flange on the left catalytic converter rusted through so I had that replaced. But, when the flange went bad, it got loud and the car started to shutter at low speeds (<10 mph) and run real crappy. So i had the flange redone and the car quieted up and the leak was gone, but the car still ran crappy at low speeds and at idle you can feel the car shake. So ran a diagnostic KOEO and threw codes 524 and 543. What is bad, fuel pump? Injector? O2? AllData says possible causes:
1) open in power-to-pump circuit between VCRM and FPM splice.
2) Open in B(+) supply to VCRM (pins 4 and 5)
3) Left heated oxygen sensor (HO2S) short to power.
Help me interpret this stuff, my gas mileage is horrible and I can't drive with this shudder for long! Want to make sure the O2 is bad before I replace it.
Also, for the record, I have 98,000 miles on the stock plug wires, but new plugs.
Thanks in advance.
1965 Mustang in primer
1995 Mark VIII
http://memimage.cardomain.net/member_images/3/web/771000-771999/771311_5_full.jpg
1) open in power-to-pump circuit between VCRM and FPM splice.
2) Open in B(+) supply to VCRM (pins 4 and 5)
3) Left heated oxygen sensor (HO2S) short to power.
Help me interpret this stuff, my gas mileage is horrible and I can't drive with this shudder for long! Want to make sure the O2 is bad before I replace it.
Also, for the record, I have 98,000 miles on the stock plug wires, but new plugs.
Thanks in advance.
1965 Mustang in primer
1995 Mark VIII
http://memimage.cardomain.net/member_images/3/web/771000-771999/771311_5_full.jpg