Try some of these checks with an ohmeter. On the air flow meter (on air filter housing) test between pin 3 & 4 (1 is closest to the engine & 4 is closest to the air filter) should be 500 - 1000 Ohms, this is the air temp sensor. You can also test between pin 3 & 4 while you move the internal flap & resistance should vary throughout it's range. Also, check resistance on the coolant temp sensor. It's a two pin sensor located where the upper radiator hose connects to the cylinder head, on the underside. It should be a blue connector. Resistance will vary w/temp, about 2000-3000 Ohms @ 68 F or 200 to 400 Ohms at operating temp. Higher resistance at colder temps.