I have been looking in this sub-forum so, perhaps I am in the wrong place so here goes ...

My car has an intermittent miss that may or may not activate the check engine light. It may or may not go into a low-power mode that limits the engine to 3,000 RPM.

The fuel injectors were professionally cleaned about 30K miles back, with new spark plugs about 25K miles back, and it has a clean air filter. Removing the air filter has no effect on engine behavior and I don't notice any specific smells or exhaust issues.

I think a real-time data logger would be really helpful in catching what is going on. At this point, I wonder about VTEC or valve train issues, spark issues, or possibly a fuel injector starting to fail.

What would be a good quality cost effective data logger? I am not really looking to do custom tunes and modifications like that but, I would like to monitor my engine to figure out this problem and ensure it is healthy.

TIA,
Sid