The following applies mainly when accelerating from zero speed at 1st gear in RPM below 2500. Above that RPM range, there is no problem (then acceleration is assisted by turbo-compressor).
When engine is cold and I start the car, it is able to accelerate normally.
When engine has normal working temperature and I stop the car (e.g. at lights), then
- if I accelerate after some 10 seconds, engine accelerates normally – no issue.
- if I accelerate after 1-5 seconds, engine is very lazy: even with accelerator on the floor, acceleration is 3-4 times slower than normally. RPM increase very slowly like if the car was ignoring accelerator pedal.
OBD-II engine diagnostics shows zero errors.
This issue is new. Before the engine was accelerating normally under any conditions.
Any ideas what can be the issue?
This can create pretty hazardous situations because if the driver relies on usual acceleration but instead the car only unexpectedly slowly rolls into the intersection, there is a chance of collision.
Details: Opel Zafira B (2009) • EcoFlex Turbo 1.6 bi-fuel (CNG + Petrol), 150 hp • manual 6-speed