shifty23

i just picked up an old 91 ls400 that has been sitting for a couple years.. now i got the engine to turn with the help from some starting fluid in the intake but it wont stay running i think its bad gas caught up in the lines so my question is how do i get the bad gas out of the lines??

shifty23

just to add another note i've already added 5 gals of 91 octane and fuel system cleaner to the tank it had a lil less than a 1/4 tank of the old gas and the car has about 150k miles on it dont know if that will help you guys but any help i can get will be much appreciated!! thanx guys

ffcgary1

My guess would be to get as much of the old fuel out of the tank as poss then refill to half mark with fresh fuel, then disconnect the fuel lines where they meet the injector rail and spin the engine on the starter to purge the old fuel from the fuel lines. It should then start. you could also pour a small amount of oil down each plug hole to give the upper cylinders a coat of oil to help the motor turn over. Good Luck.
Gary.