Via Ryan Avent and Paul Krugman, Goldman Sachs has a chart showing the impact of the US fiscal stimulus of 2008-2009:
Basically from the last quarter of 2009 onwards, fiscal policy acted as a brake to the economy, not as a boost. And monetary policy was not much better.
If you want a more wonkish look at this, there’s an interesting paper on NBER I pointed to last year. And Malaysia’s fiscal “stimulus” of the same period was not much more effective.
