EXTENSION AS 3081380 - Caterpillar

While cold start procedures for PEEC engines are similar to those for mechanical engines, two major differences exist.
First, PEEC often requires a couple more seconds of cranking in order to bring oil pressure high enough to move the rack from the shutoff position. Using an oil with incorrect viscosity can result in longer cranking time.
Second, when a PEEC engine is first started, PEEC goes through a cold start sequence to provide the correct warm-up time. If during this sequence PEEC determines the engine is cold, PEEC will increase low idle to 900 to 1000 rpm (to decrease warm-up time), limit engine speed to around 1700 rpm, inhibit timing advance, and limit power significantly (to less than 200 hp). This "cold mode" operation will continue until either the engine is warm, 15 minutes expires, or vehicle speed exceeds 30 mph.
Note that PEEC goes through this sequence whenever the engine is started, regardless of outdoor temperature. In warm weather, the cold start sequence will take only about ten seconds. If a driver steps on the throttle before the sequence is complete, PEEC cautiously assumes "cold mode", and continues to limit power. Full power will not be restored until the driver's foot remains off the throttle for at least three seconds.
Knowledge of this cold start sequence can help in troubleshooting intermittent electrical power problems. If electrical power to PEEC is momentarily interrupted, PEEC again assumes "cold mode" until it can complete the cold start sequence. Both power and rpm will then be limited until the driver again leaves his foot off the throttle for at least three seconds, and PEEC completes its cold mode check (about another 7 seconds). If vehicle speed is above 30 mph, however, PEEC assumes that the engine is warm and that electrical power was just momentarily interrupted, so operation continues as normal.