Volvo: 1995 volvo 960 crank but wont start, 1995 volvo 960, volvo 960

Question
How work engine reference sensor?
Because don't have signal and in the test mode 2 dont have the crank signal.
note:I check the wiring and sensor resistance ok ,grounds ok,batery voltage to ECM ok.

Answer
Heriberto,
There is also a cam sensor and that also goes out. No codes from the A2 how about the A6? Check for injector pulse and spark. How is the fuel pressure? If the compression is low due to the cylinders being washed out by gas, remove the plugs and let it dry out for a while and give each cylinder a squirt of oil to help bring back the compression.