* Fuel delivery issue. Check fuel pressure to ensure it is within specifications(60 psi). You can use fuel injector cleaner to attempt to clear any blockages in the fuel system.
* Ignition system issue. Check spark plugs to ensure they are properly gapped and free from damage. Check for spark from the ignition coils.
* Timing belt issue. Ensure that the timing belt is installed correctly, with the correct number of teeth on each camshaft sprocket.
* Compression issue. Perform a compression test to ensure that each cylinder has adequate compression.
* Electrical connection issue. Check all electrical connections to ensure that they are secure and free from corrosion.
* Computer issue. The ECU may need to be reprogrammed for the H22 engine.
Troubleshooting steps:
1. Check fuel pressure.
2. Check spark from ignition coils.
3. Check timing belt installation.
4. Perform compression test.
5. Check electrical connections.
6. Reprogram ECU (if needed).
