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HOMESERVICE MANUALSFORD1985BRONCO 5.8 G, STANDARD, TODREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 44 (EEC-IV CEC SYSTEM)QUICK TESTINTERMITTENT SURGING AT STEADY SPEED
1985 Ford Bronco 5.8 G, Standard, TOD

Intermittent Surging At Steady Speed

1985 Ford Bronco 5.8 G, Standard, TODSECTION Intermittent Surging At Steady Speed
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1988 Ford Ranger, 1988 Ford RV Cutaway, 1988 Ford Pickup, 1988 Ford F-Super Duty, and 1988 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check plug firing voltages, cylinder balance, base ignition timing, spark plug type and MAP and BP sensor (depending on vehicle). See MAP/BP SPECIFICATIONS table.
  2. On Vane Airflow Meter (VAF) equipped vehicles, check for unmetered air leaks. On all vehicles, check flow of fuel injectors and fuel pressure.
MAP/BP SPECIFICATIONS

Altitude In Feet Voltage Output
0 1.55-1.63
1000 1.52-1.60
2000 1.49-1.57
3000 1.46-1.54
4000 1.43-1.51
5000 1.40-1.48
6000 1.37-1.45
7000 1.35-1.43
RENDER: 1.0x

NO RELATED

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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.