SPONSORED LINKS

1993 Lexus LS 400 Engine hestitates and sputters

Tiny
VEREEFREEMAN
  • MEMBER
  • 1993 LEXUS LS 400
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
My LS 400 is running funny. It's hesitating and sputtering when driving. When I press the accelerator the tachometer drop from 2-3 down to 0 and bounce up and down.
Wednesday, January 6th, 2010 AT 6:33 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the following below:

Oxygen Sensor
Catalytic Converter
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
Coil and Rotor
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, January 6th, 2010 AT 7:07 PM

Please login or register to post a reply.

Related Engine Sputter Content

VIEW MORE

Sponsored links