ironically, you only find out what's wrong with something by guessing. diagnosis is always guess work, but you'll want to rule things out one-by-one.
most sensors read real-world values, and you can confirm with common sense, such as:I just don't know what is normal and what is not.
your coolant temp or CTS or whatever your adx calls it should be near-ambient before you start, then climb up as the engine warms. if the engine will not run, you can remove the sensor and heat it while logging to ensure that the value is changing to reasonable values.
map sensor senses engine vacuum, so it should be around ~100kpa (or whatever your local atmospheric pressure is) before the engine starts when there is no vacuum, then it should match intake vacuum when running, say 30-40kpa. you can use a mechanical vacuum gauge to verify on a running engine, or you can unhook the map sensor, stick a hose on it, and apply vacuum with a hand pump too.
the iac valve moves in steps, which is confusing, but 0 is closed and 160 is damn near wide open. the wider the opening, the more idle speed it's trying to attain. your engine being TBI, i'd expect it to be very far open on a cold engine and for cranking, progressing to nearly closed on a warm engine. the IAC adds air to what comes through your throttle plate(s) to attain the idle speed, so if your plates are too far closed with the idle screw, the iac will tend to stay open and still never attain its target idle speed, and if your plates are too far open, it'll hang out at zero all the time.
throttle position (tps) should be near-zero at closed throttle and 100% at open, you should be able to slowly move it from closed to open a few times and watch the number move, if it jumps around or drops while moving the throttle, TPS is bad
i think those are the only sensors necessary for starting that engine.
that's very far from good detective work,Vehicle smells of gas when cranking, so, I don't have a fuel problem
are you sure the 'smelly fuel' is coming out of the injectors?
are you sure your fuel pump running constantly once the engine starts? what's your fuel pressure like?
have you physically removed the air cleaner and looked at the injectors?
when the engine dies, do the injectors shut off dead?
if you drizzle a bit of fuel into the intake once the engine catches, can you keep it running?
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