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1996 Lexus LS 400 Misfiring of Engine

Tiny
PATNAIK48
  • MEMBER
  • 1996 LEXUS LS 400
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 159,800 MILES
I recently had my car tuned up and had new plugs, distributor caps, wiring changed professionally, but it seems the misfiring has got worse. The lexus dealership confirmed that there was misfiring on cylinder # 2, 4 and 7. They said they opened up and inspected and put back everything and reset the codes and test drove it and it ran fine. But when I took the car it started misfiring as soon as I came out of their front gates and it was worse.I have since spoken to the service tech. And they are going to let me know. What do you think is the possible problem. Oh yes and the check engine light flashed and stayed on.
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Wednesday, June 10th, 2009 AT 8:30 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Scanned the computer for code/s

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
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Wednesday, June 10th, 2009 AT 8:44 AM

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