99 stalling help!!!!
 

ok i have a 99 galant es 4 cyl and recently the car was shaky at start and idle now its still shaky at start and idle and after running for a little the temp gauge goes up to about half way and the car just stalls and wont run till it cools almost all the way but then stalls as soon as it warms up again I replaced one of the coil packs and this did not help. any help would be greatly appreciated. thank you!