1991 Acura Legend Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Ignition Timing

  1. Operate engine until cooling fan comes on. Locate connector at right side (under dash). Connect terminals of ignition timing adjusting connector with a jumper wire. See Fig 1 .
    Fig 1: Locating Ignition Timing Adjusting Connector
    G91H16276Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Connect timing light. With engine at idle, Red mark on crankshaft pulley should align with pointer. See Fig 2 . If Red mark and pointer are not aligned, adjust timing. See IGNITION TIMING  table.
  3. Adjust ignition timing by turning adjusting screw on ignition timing adjuster. See Fig 3 . Remove control box cover. Using a 3/16" drill bit, drill out 2 rivets from adjuster and remove cover.
  4. Turn adjusting screw counterclockwise to retard timing, or clockwise to advance timing. After adjustment, install cover to ignition timing adjuster with new rivets. Remove jumper wire from ignition timing adjusting connector.
    Fig 2: Locating Ignition Timing Marks
    G46500Courtesy of AMERICAN HONDA MOTOR CO., INC.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.