i totally agree with the above user,def check into the e.h.a. system. try disconnecting the 2 pin connecter its located on the back of the fuel distributor,its a large black sensor with 2 screws in it, it bolts directly to the back of it,facing firewall.mines having a very similiar issue,mine wont start on cold mornings unless its plugged in ,but then it will not get out of its own way that is untill i dissconect the eha,its wierd.they generally last forever,untill they crack open and begin weeping fuel down the back of the motor,i guess thats why most of them cost approx $280.00.give it a shot,goodluck hope it works.