Engine starts but then dies

Step 1: Is ignition system in proper condition?

Check battery voltage, ignition distributor, spark plugs, ignition coil, ignition timing, etc.

  • Yes: Go to Step 2

  • No: Repair or replace damaged ignition components

Step 2: Is engine in proper mechanical condition?

If engine still does not start or starts only poorly after the electrical test, check for mechanical problems: Compression, basic adjustment of valves and engine oil pressure.

  • Yes: Go to Step 3

  • No: Repair or replace damaged components

Step 3: Is the fuel pressure correct?

Check the fuel pressure. Is the fuel pressure correct?

  • Yes: Go to Step 4

Does the fuel pressure drop again after the end of the starting process?

  • Yes: Go to Step 3-A

  • No: Go to Step 4

Step 3-A: Is the air-flow meter fuel pump contact operating properly?

Test the fuel-pump contact in the air-flow meter: remove the upper section of the air filter. Detach the plug from the air-flow meter and connect the ohmmeter to the terminals 36 and 39 at the air-flow meter. Press the air-flow meter flap open slightly by hand. The resistance must change from infinite to zero.

  • No: Replace air-flow meter

Step 4: Is the start valve in proper condition (no leaks)?

Test the start valve for leaks. In order to do this, clamp the fuel intake line closed with a clip. Does the engine then start when cranked?

  • Yes: Replace the start valve