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