I am working on a 97 del sol with the y7 engine it smokes and wont idle you have to keep feathering the throttle to keep it running then when its warm it idles just fine and doesnt smoke what could this be?

 

Did you ever have to add coolant? Check engine light on?

 

I havent added any coolant and cel is not on

 

Also sometimes it will die when its cold and white smoke will come pouring out the throttle body

 

what do you mean coming out of the throttle body ? your issue could be the engine coolant temperature sensor or even the fitv could be bad

test it for ohms with the car completely cold should be 2000-2500 ohms...with the car completely warmed up it should be 180-250

 

White smoke will come out of throttle body if its cold and dies

 

do a compression test and leakdown test when cold and when hot. might have a blown headgasket. or the rings could be cooked.

take the sparkplugs out, post an up-close pic of the tips of them all.

 

Figured out the problem the gas station he got gas from put diesel fuel in the premium tanks so it had diesel in the car