Question about 1992 Lexus Sc 400

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Engine runs rough

I just had the power steering pump replaced on my 1992 sc400. When I got the car back, I noticed a significant change in the car's performance. It seems that, even at a standstill, when I rev the engine it sounds as if a spark plug is missing! The owner of the repair shop says it may be cracked engine mounts. But that wasn't the case when I brought the car in. Could the mechanic have cracked the engine mounts whily doing the power steering pump job?

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Sounds like he removed some of the spark plug wires during his repair and possiably put them back in the wrong place also try opening your hood at night and fire the engine up then look under hood to see if there ar any wires sparking maby a spark plug wire came loose

Posted on Jan 30, 2009

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Removal Procedure
  1. Place a drain pan under the vehicle.
  2. Remove the fuel injector site shield.
  3. Remove the power steering pump pulley from the power steering pump.
spacer.gif 2008-08-27_145449_diag1.thumb.gif spacer.gif spacer.gif View Full Image spacer.gif 4. Remove the power steering pump pressure hose (1) from the power steering pump.

5. Remove the power steering pump return hose from the power steering pump.
2008-08-27_145520_diag2.gif6. Remove the power steering pump mounting bolts.

7. Remove the power steering pump.
spacer.gif 2008-08-27_145611_diag1.thumb.gif spacer.gif spacer.gif View Full Image spacer.gif 8. Remove the power steering pump reservoir from the power steering pump.

Installation Procedure
  1. Install the power steering pump reservoir to the power steering pump.
spacer.gif 2008-08-27_145711_diag1.thumb.gif spacer.gif spacer.gif View Full Image spacer.gif 2. Install the power steering pump to the vehicle. Notice: Refer to Fastener Notice in Service Precautions.

3. Install the power steering pump mounting bolts. Tighten the power steering pump mounting bolts to 25 Nm (18 ft. lbs.).
spacer.gif 2008-08-27_145739_diag2.thumb.gif spacer.gif spacer.gif View Full Image spacer.gif 4. Install the power steering pump return hose to the power steering pump.
spacer.gif 2008-08-27_145822_diag1.thumb.gif spacer.gif spacer.gif View Full Image spacer.gif 5. Install the power steering pump pressure hose (1) to the power steering pump. Tighten the power steering pump pressure hose to 30 Nm (22 ft. lbs.).

6. Install the power steering pump pulley to the power steering pump.

7. Install the fuel injector site shield.

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Power Steering Pump: Service and Repair
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