BROWNLEXUS1

Hey Bob I currently have the same sputter stall problem on my 94 LS400 but this only happens when the humidity / temperature outside is high. The problem happens on a full tank but only after I drive for about 20 minutes or so and then turn the car off and on. Did you ever resolve this issue? Hi Bob, I was a lexus tech for a long time. I have seen two things cause these symptoms, first oxygenated fuel or high achocol content fuel mixed with warm weather can cause the fuel to boil in the rail. Usally worst after trying to restart a warm engine after 15-30 min of sitting. try a different brand of preimum and see what happens. Second and more common the check valve in the in-tank fuel pump allows fuel pressure to bleed off. let it sit an hour and crack open the fuel line at the rail if you don't get a good high pressure squirt replace the pump. Rusty

Hey Bob I currently have the same sputter stall problem on my 94 LS400 but this only happens when the humidity / temperature outside is high. The problem happens on a full tank but only after I drive for about 20 minutes or so and then turn the car off and on. Did you ever resolve this issue?