1989 Ford Bronco II RWD, Standard, M5OD-R1FACTORY OEM SERVICE PROCEDURE

6 Cylinder Ignition Timing Specifications

6 CYLINDER IGNITION TIMING

Application & Calibration Code () Degrees BTDC RPM
2.9L V6
0-65T-R00 10 850
0-65T-R00 10 800
0-66F-R10 10 850
0-66F-R10 10 800
0-66H-R10 10 850
0-66H-R10 10 800
0-66T-R00 10 850
0-66T-R00 10 800
0-65F-R00 10 850
0-65F-R00 10 800
0-65H-R00 10 850
0-65H-R00 10 800
3.0L V6
9-55J-R11 10 Idle
9-56J-R10 10 Idle
4.9L 6-Cylinder
0-51E-R02 10 650-750
0-51F-R02 10 650-750
0-51G-R02 10 650-750
0-51H-R02 10 650-750
0-51R-R02 10 625-725
0-52H-R00 10 () 590-690
0-52J-R00 10 () 525-625
0-52K-R00 10 () 525-625
0-52L-R02 10 () 550-650
0-52Q-R00 10 () 525-625
0-52R-R00 10 () 525-625
0-52S-R00 10 () 590-690
(1) Located on underhood emission decal.
(2) With Automatic Transmission in "Drive".
(3) Refer to underhood emission decal.
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.