94 Swift GA 1.3 - hot start problem

Hi !

I just bought a 1994 Suzuki Swift GA (1.3 liter), with 77,000 miles.

When the engine is cold, it starts right away (within 1 second), and drives great.

After it has run for 10 minutes, sometimes the engine runs a bit rough - like the engine is "missing".

When it's "hot" (after it has run for 10 minutes) and shut off, it will not start:
the engine turns over (compression seems normal), but it does not "fire"; also, every second or so it "backfires" (flames out of throttle body).

When this happens: it seems to have ignition - a screwdriver in the spark plug boot gives a nice spark, although I can't tell if it's timed right. I checked and cleaned the engine grounds. The fuel tank is full. Pouring gas into the throttle body then trying to start it makes no difference. I checked the valve timing (correct) and checked and tensioned the timing belt (good).

After the car has set and cooled for 1/2 to 1 hour, it starts right away.

Has anyone experienced something similar? Any ideas?

Thank you,
Philip Dybel

have u changed your spark plugs and checked if the spark plug wires are in the corect spot???