1989 Honda Accord LXi Big Problems

Ok here's the situation I bought a used car and ran into a big problem...
at first it didn't have any problems a month later now it has problems
starting and smokes at times when it does start once it warms up it's fine
but it also has the problem of feeling like it's gonna stall when it's not
warm and there are times when it does stall out... I know i didn't give
all the details but it's because there are so many so any help would be
great
Thank you for your time

 

Clean the EACV. The smoke I don't know. What color?

 

Ok more details the smoke is light gray already talked to my mechanic and
he knows it's from the fuel well mostly because of the color and the fact
that you can smell gas... The smoke isn't that consistant except once
where it smoked for a good 15 minutes... I've changed gas done a fuel
injection cleaning had a tune up but the real mystery behind this is the
check engine light and i have a feeling that if that is solved then
everything else will fall in place... The light is on because of the EGR
valve which has been replaced and serviced but it still comes back and
when the car has the problem of not starting the mech feels like it's not
getting enough oxygen so we replaced the sensors no change... his next
thought and this was just a guess was to replace the fuel pressure
regulator but as i said just a guess... I don't know if anyone has had
this problem before but any help would be great because if it's to the
point that people have to guess then it basicly could be anything...
Thanks again for your time

 

Forgot to add that the issue with starting happens wiether cold or hot...
After driving for hours if i shut off the engine sometimes it takes 10 to
15 minutes to start again... plus spark plugs were dry
thanks again