My 1997 suzuki jx 1.6 ltr starts when cold but at opperating temp it needs about 30 min to cool before it will start again.

so how cold is it, KeyWest, 72F or -50F in Alaska.?
Intake Air temp sensor in air cleaner or it pipe.
infact the 1992 kick has no IAT,
it's not that, the IAT sensor has almost no effect on this engine.
(not true on 1995 8v engine, for those reading this)

The G16B engine, has MAF sensor, and it rules fueling, 99%
MAF is the Air meter.
there is an air temp correction sensor inside the MAF, but can not be replaced (decretely) and the MAF is $1000 at suzuki or $400 rebuilt by Cardone.
End guessing, start Diagnosis?
cold starts, (poor) can be lots of things. Ill list them but we do simple tests to find which one it is not guess and IAT is bad guess.

1. never tuned up this decade. see first link below.
2. bad fuel, old fuel (over 1year old, i have to ask)
3. ECT water sensor reads too low, temp (rare) use scan tool.
4. ISC valve stuck closed, starving engine of air , hard starts.
5. IAC (ISC is electri) IAC is thermal only, not open on cold engine its bad. end story, it adds extra air cold, so if dead, engine WILL FLOOD. (cold starts floods) "too much fuel"
6. low compression (cam belt slipped, and no longer 170PSI, makes hard starts. and loss of power. and overheating.
7. vacuum tests show bouncing vacuum? oops. (ask)
8. vacuum test show lazy vacuum (cat conv. melted?)

the official list is here.
cap, rotor , wireset, spark plugs. will give you GREAT spark
called tuneup (as will the 2 filters)
http://www.fixkick.com/specs/scheduleBw.jpg

http://www.fixkick.com/IGN_timing/tune-ups.html



at the least, the spark plugs are bad, on most cars 90% owners ignore the key 60,000 mile tune up, and just as many run 19 year old cap/rotor wires sets, and fails. "do the service points"
Get some Bosch parts in there, (or NGK) mag wire sets.

theres a couple of things to check for this first generation series,, check the Air flow meter connector FP terminals, and intake tube, make sure its tight and doesnt have a leak.

A throttle positioning sensor or idle sensor can cause these problems, low fuel pressure can cause these problems also low fuel pressure can be caused by a faulty fuel pressure regulator.

try to change the coolant temp sensor.

bad ignition modual , and when it cools off it'll start again ! use a napa modual

maybe slow,cold start,air control valve or,possibly normal for temp in morning,I live in Australia and cars can take ages to slow down in winter eg1 to 3 deg cel...and very quickly warm up in summer..eg....idle slows down in 1/4 time,have a look at the car if you can park it in warmer conds... to see if its quicker as Toyotas do this normally for fast warm up,lastly has it been well serviced...looked after??

Could be the ignition coil or ignition module. Also check the ignition fuse.

You could have a bad cold start valve, go to an auto parts store and buy the cold start valve and replace it. you will see it on the intake manifold also pull off the air cleaner or hose and get a can of berry mans carb cleaner and clean the throttle plate inside and out then lube the throttle cables with Wd 40 then try it, if it starts your set, if not try pushing the throttle all the way to the floor and crank for 15 seconds then wait one minute then slightly press the gas pedal and try starting again this is how you clear flooded engine. If it starts you know that the throttle plate or cable froze shut and would not allow air into the engine causing it to flood. also check that the O-ring is not missing on the distributor cap which would allow condensation to form inside the cap shorting out the plugs and allowing it not to run. if it does it again pull the cap and look inside the cap if you see moisture then you need to replace the cap and rotor and O-ring.

hello ralph...check the coolant temp sensor. It acts as a choke to richen fuel mixture when cold. If it doesn't work correctly, hard starting will occur. Once engine reaches operating temp, the problem is usually non-existent. also....
Worn spark plugs.
Fouled spark plugs.
Worn distributor cap and rotor.
Old ignition wires.
Low engine coolant level.
Faulty MAP sensor...any of these will effect cold starting....

Good luck...i hope this helps.

hands on job iam afraid,could be anything from a housing to a core plug and everything inbetween,call a mobile mechanic and in 20 secs he will diagnose the problem