Tough to say when it only lasts a few seconds. Possibly a poor connection at a sensor or module meaning a single contact within a connector could be slightly misaligned or be corroded. Normal power surges at startup may overcome this as the engine stabilizes. O2 sensors are out of the loop till they warm up after a minute or so. Engine Temp Sensor (ECT), Throttle Position Sensor (TPS), Idle Air Control (IAC) valve, Exhaust Gas Recirculation (EGR) valve, Inlet Air Temp (IAT) sensor, cam and crank sensors, Powertrain Control Module (PCM) etc are. Could be first indications of small a vacuum leak. That's all just a wild wag at best. I would just keep an eye on it for now.
Last edited by Cougar41; 04-20-2011 at 01:21 PM.