yesterday i installed bbk shortys and bassani x pipe with new o2 sensors. the car idles fine but once the check engine light comes on its a task to keep it running. the egr tube that connects from the header to egr valve bbk supplied was too short so i hooked it up to the header and pinched it off. the CEL came on with the old exhaust but keeping it running was never a problem. IAC? Fuel pump? any ideas?????