I need help! I have a 1995 Volvo 850 turbo. The check engine light turns "ON". OBD reader indicated that cylinder 1 miss fired. I took the injectors out and send them out for cleaning. I put them back after a week later, the engine turns but cannot run. I also replaced the fuel pressure regulator because the gas keeps returning back to the main fuel tank when I purge the fuel rail. That did not change the outcome. I checked all vacuum hoses, fuel pump relay contacts and mass airflow sensor. They all look fine. I need to know what to check next. Please advice.
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