I have a 1990 Turbo II. The turbo stoped working and I removed it and repaired it and re-installed. Now when I start the car it starts fine but it will run for only approx two seconds and stops just like I turned off the ignition switch....I have checked out everything...all solinoid valves for continuity and voltage....the air inlet slide plate for voltages and it all checks within spec...any suggestions?????