Lack of low end RPM throttle response

[Dommedag]

Hey R3V.

Recently I've been having some issues with my M20, I seem to not get any response from the throttle when I'm coming out of idle or below 1000 rpm. Almost like there's a dead spot and that's pretty dangerous for in-town driving.

any ideas?

[jlevie]

That is most commonly caused be intake leaks, which a smoke test will find. But it could be a bad spot in the AFM's resistance trace.

[Dommedag]

That is most commonly caused be intake leaks, which a smoke test will find. But it could be a bad spot in the AFM's resistance trace.

what's best to use for testing? I've seen people suggest testing it in way too many ways.

[dnguyen1963]

Have a shop do a smoke test for you. Make sure that both intake and exhaust are plugged and smoke is kept between 2-4 psi.