At first it was intermediate, but now at highway speeds loses power. Doesn't seem to matter on temperature or distance. Codes:* P0261, P0263, P1001, P1003 were cleared and haven't come back. I changed the following chasing this demon: Throttle Position Sensor
System Relay
Engine Temperature Sensor
Fuel Filter
Internal Fuel Lines
Check Valve and Hose
Spark Plugs and Wires. I'm at a loss....