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  • Lexus Model
    94 LS 400
  1. 1994 Ls400 120k miles 2nd owner bought in Florida, Florida car Problem is with acceleration after about 1/4 down on the gas pedal. Sputters with hard acceleration and "jumps" but does not gain any speed. (like on ramps, passing, ect) Check engine light comes on as it sputters. Let off the gas and I'm able to accelerate slowly. I've tried: trunk wiring harness (looks good), fuel system cleaner, new plugs, wires, coils, cleaned throttle body, new air filter and new fuel filter. Heading to florida this week to see "her" and have an appt with a Toyota dealership. Have not checked the codes yet. Would like any hints before I go in for big $. Thanks for any suggestions.