1990 Lexus LS400 starts sputtering while accelerating only after it warms up?? Forums at Automotive.com
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1990 Lexus LS400 starts sputtering while accelerating only after it warms up??

 
opsta opsta
New User | Posts: 1 | Joined: 07/06
Posted: 07/17/06
01:06 AM

When I first start the car, it drives fine... after about five minutes the car reaches normal operating temperatures and it starts sputtering and even dies on occasion. If I drive it for about 15 minutes... the problem resolves itself. I just had a tune-up, injector cleaning, and replaced fuel filter. Can anybody help?  

 
automotivedp automotivedp
Enthusiast | Posts: 487 | Joined: 06/06
Posted: 07/17/06
02:22 AM

i think you may be running rich based on the stalling.  does the car get bogged down and then stall? if so the air fuel ratio may be rich- a fuel problem.  is the sputtering you mentioned hesitation or pops, like backfires?  

 
automotivejtm automotivejtm
Guru | Posts: 1019 | Joined: 03/06
Posted: 07/17/06
03:58 AM

do you have a check engine light on? when was the last time you had your spark plugs changed? did you have this problem before the tune up?  

 
 
automotivedp automotivedp
Enthusiast | Posts: 487 | Joined: 06/06
Posted: 07/17/06
04:03 AM

automotivejtm:
do you have a check engine light on? when was the last time you had your spark plugs changed? did you have this problem before the tune up?

true, id hate to see the problem show up after having someone work on your car.