Proud Owner
Probationary Member
- 28
- 0
- Jun 15, 2014
-
northampton,
Pennsylvania
so I seem to be having all the classic signs of vapor lock on my 2g eclipse. it cold starts just fine. but once its fully warmed up if I shut it off and then try to start it RIGHT AWAY it starts, but if I let it sit about 3-4 minutes it cranks and cranks but won't fire at all. if you let it sit for 15 mins or more then it starts just fine. I have a Haltech ECU and checked prime pulse table which looks fine, changing values in there higher, lower etc doesn't help at all.
My coolant temp sensor is working perfectly. Fuel pump runs great (its kinda loud so its obviously working) didnt check fuel pressure though but the car runs great so I'm assuming that's not the problem. During normal operation, my engine warms up to 200F nice and quick at which point the fans start cycling and keep it steady between 190 and 197 (data logged). when I shut the car off it starts to heatsoak up to 223 and that's where you cant start it for crap. then it slowly creeps back down and under 195 it will usually start again.
First of all I don't quite understand how vaporlock can happen in a recirculating system. wouldn't the fuel pump just push the vapor back into the tank and fresh cool fuel into the rail? If so would I maybe have a blocked return line? also the evap system has been deleted, maybe they didnt do that right? anything I can check? Has anyone else struggled with this and found a better fuel maybe or another solution? I understand the boiling point of gas can very dramatically from one company to another so maybe I keep getting cheap gas? Or should I have my cooling fans kick in sooner to keep the car maybe around 180F instead of closer to 200F ?
thanks for any and all help!
My coolant temp sensor is working perfectly. Fuel pump runs great (its kinda loud so its obviously working) didnt check fuel pressure though but the car runs great so I'm assuming that's not the problem. During normal operation, my engine warms up to 200F nice and quick at which point the fans start cycling and keep it steady between 190 and 197 (data logged). when I shut the car off it starts to heatsoak up to 223 and that's where you cant start it for crap. then it slowly creeps back down and under 195 it will usually start again.
First of all I don't quite understand how vaporlock can happen in a recirculating system. wouldn't the fuel pump just push the vapor back into the tank and fresh cool fuel into the rail? If so would I maybe have a blocked return line? also the evap system has been deleted, maybe they didnt do that right? anything I can check? Has anyone else struggled with this and found a better fuel maybe or another solution? I understand the boiling point of gas can very dramatically from one company to another so maybe I keep getting cheap gas? Or should I have my cooling fans kick in sooner to keep the car maybe around 180F instead of closer to 200F ?
thanks for any and all help!