1991 Ford Grand Marquis

Introduction:

The 1991 Ford Grand Marquis was a full-size sedan available with two engine options: a 4.6-liter V8 and a 5.0-liter V8. Both engines were paired with a 4-speed automatic transmission. The Grand Marquis was praised for its spacious interior, comfortable ride, and powerful V8 engines. However, it was criticized for its dated exterior styling and poor fuel economy.

Engine

4.6-liter V8

• Intake Manifold Gasket Failure:
  • Description/Symptoms: Coolant leaks, loss of power, rough idle
  • Solution: Replace intake manifold gaskets
  • Estimated Cost to Fix: $500 - $1,000+
• Valve Seat Recession:
  • Description/Symptoms: Burning oil, blue smoke from exhaust, loss of power
  • Solution: Resurface cylinder heads, replace valves
  • Estimated Cost to Fix: $1,500 - $3,000+

5.0-liter V8

• Ignition Coil Failure:
  • Description/Symptoms: Engine misfires, loss of power, rough idle
  • Solution: Replace ignition coils
  • Estimated Cost to Fix: $200 - $500+
• Head Gasket Failure:
  • Description/Symptoms: Coolant leaks, overheating, loss of power
  • Solution: Replace head gaskets
  • Estimated Cost to Fix: $1,000 - $2,000+

Transmission

• 4-Speed Automatic Transmission
  • Overdrive Failure:
    • Description/Symptoms: Difficulty shifting into overdrive, loss of power, transmission slipping
    • Solution: Replace overdrive solenoid, rebuild transmission
    • Estimated Cost to Fix: $500 - $1,500+
  • Torque Converter Shudder:
    • Description/Symptoms: Vibration or shuddering when accelerating or shifting
    • Solution: Replace torque converter
    • Estimated Cost to Fix: $1,000 - $2,000+

Suspension

• Front Suspension Strut Failure:
  • Description/Symptoms: Worn struts, rough ride, poor handling
  • Solution: Replace struts
  • Estimated Cost to Fix: $300 - $600+
• Rear Suspension Coil Spring Breakage:
  • Description/Symptoms: Sagging rear end, uneven ride height
  • Solution: Replace coil springs
  • Estimated Cost to Fix: $200 - $400+

Electrical

• Alternator Failure:
  • Description/Symptoms: Loss of charging power, battery not charging
  • Solution: Replace alternator
  • Estimated Cost to Fix: $300 - $700+
• Starter Failure:
  • Description/Symptoms: Engine not cranking, clicking sound when starting
  • Solution: Replace starter
  • Estimated Cost to Fix: $200 - $500+

Exterior

• Door Handle Breakage:
  • Description/Symptoms: Door handle does not open door
  • Solution: Replace door handle
  • Estimated Cost to Fix: $200 - $400+
• Tail Light Wiring Harness Corrosion:
  • Description/Symptoms: Tail lights not working
  • Solution: Replace wiring harness
  • Estimated Cost to Fix: $100 - $200+

Interior

• Climate Control Failure:
  • Description/Symptoms: AC or heat not working, fan not blowing
  • Solution: Replace climate control module
  • Estimated Cost to Fix: $300 - $500+
• Seat Track Failure:
  • Description/Symptoms: Seat does not adjust or moves freely
  • Solution: Replace seat track
  • Estimated Cost to Fix: $200 - $400+

Summary:

The 1991 Ford Grand Marquis is a reliable vehicle with a comfortable interior and powerful V8 engines. However, it is known to have some issues with the intake manifold gaskets, valve seats, and ignition coils. The cost of these repairs can vary depending on the severity of the problem and the location of the mechanic. Overall, the Grand Marquis is a good choice for those who need a spacious and comfortable sedan.