White smoke, no acceleration, sputtering!!!!

Asked by Jul 11, 2012 at 03:52 PM about the 1997 Lexus LS 400

Question type: Maintenance & Repair

I have a 1997 Lexus LS400 and it is currently in the shop for repairs, but it has been there for 2 WEEKS!  

First they said it was the EGR valve pipe, which was broken and they repaired.  When I picked up the car, it ran exactly the same.  The car shakes and blows out white smoke that smells like gasoline.  I replaced the plug wires and the spark plugs and it ran better for a while.  But it still does the same thing and I feel as though the current mechanic is giving me the run around.  He called me and told me that he "thinks" the computer is bad and needs to be replaced and it was gonna cost around $1000.  I'm not convinced its the computer.

Any thoughts?

3 Answers

355

too much fuel blows black smoke - brake fluid and auto trans fluid burns white - water makes steam - burning oil makes blue smoke you nead to work out witch one of you fluids are droping in level

1 of 1 people found this helpful.
13,115

What did the plugs you took out look like? If the EGR return pipe was bad chances are the EGR was also bad or at least gummed up. Also check if they got all the plug wires back on correctly. If two are mixed it will cause sputtering.

19,055

White smoke is usually coolant, it is rare (but possible) you are burning brake fluid or trans fluid. Thinking head gasket or intake gasket. The smoke should smell kinda sweet of you are useing antifreeze and not just water. It may smell like fuel becasue coolant wont burn and hindering combustion so excess fuel is leaving the tail pipe. Check your coolant level, also check to see if your engine oil is milky colored.

4 of 4 people found this helpful.

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