Strange phenomenon

Hello forum, maybe someone can help me here. The following problem: Saab 9000 CSE MY 95 2.3 ltr. 170 PS Ecopower, 5 gear switch. He may have gone out while driving and was towed. After several stays in Saabwerkstätten nothing could be found. After more than 40 hours search it was found that there was a mass error in the wire harness. Then the wire harness was changed, starter changed, but the phenomenon remains: this describes itself, it does not start, because it does not get a fuel. However, if you pull the plugs of the air sensor in the intake track and the plug of the cooling water sensor, it jumps immediately, but in emergency run. It has been checked and exchanged so far: control unit (3 different on old wire harness and new cable tree) Both sensors also with old and new cable tree, new starter has been put out as a new way-stoper, and all fuses have been tested and measured under the continuous flow.