1980 FORD MUSTANG

Typical onset: 50,000-90,000 mi

Symptoms: hard starting when warm, surging or stalling at idle, poor fuel economy, hesitation on acceleration, multiple vacuum hoses cracked or disconnected

Fix: Carter carbs were unreliable even when new. Rebuild kits rarely solve the problem long-term. Most shops recommend swapping to a Motorcraft 2150 or Holley 2-barrel (2-3 hours labor) or converting to aftermarket EFI if keeping long-term. Vacuum line replacement is 1-2 hours but requires diagram and patience.

Estimated cost: $400-900

Typical onset: 60,000-80,000 mi

Symptoms: sudden no-start with cranking but no compression, bent valves confirmed by compression test, belt found shredded or snapped

Fix: The 2.3L is an interference engine—when the belt snaps, valves hit pistons. If neglected past 60k, expect valve job or head replacement (8-12 hours labor). Preventive belt replacement every 50-60k miles is 2-3 hours. Always replace tensioner and water pump simultaneously.

Estimated cost: $800-2,800

Typical onset: 70,000-120,000 mi

Symptoms: excessive valve clatter on cold start, loss of power especially above 3,500 RPM, lifter tick that doesn't quiet down, metal shavings in oil

Fix: The 255 was a low-compression, smog-choked compromise—weakest V8 Ford made. Flat-tappet cam and lifters wear prematurely, especially if oil changes were neglected. Cam/lifter replacement requires intake removal (10-14 hours labor). Most enthusiasts swap in a 302.

Estimated cost: $1,800-3,200

Symptoms: clunking from front suspension, visible rust perforation in strut towers, strut mount pushing through sheet metal, alignment won't hold, cracking around shock mount welds

Fix: Rust belt cars often have strut towers rotted through or cracked from stress. Requires cutting out rot and welding in new metal (6-10 hours per side). If caught early, reinforcement plates can be welded in. This is a structural safety issue—affects handling and crashworthiness.

Estimated cost: $1,200-3,500

Symptoms: cracked or dry-rotted Michelin TRX tires, inability to find replacement tires locally, expensive specialty tire sourcing

Fix: Some 1980 Mustangs came with metric TRX wheels (390mm diameter) that use obsolete tire sizes. New TRX tires cost $300+ each when available. Most owners swap to standard 14" or 15" wheels and tires (1 hour to swap, alignment recommended). Wheels have some collector value.

Estimated cost: $400-800

Typical onset: 80,000-140,000 mi

Symptoms: gear oil dripping on inside of rear wheels, greasy buildup on differential cover, low fluid level on dipstick check, whining noise from rear end when low

Fix: Axle seals harden and leak over time. Replacement requires pulling axles (2-3 hours labor per side). Differential cover gasket leaks are easier (1 hour). If fluid has been low for extended periods, check for bearing noise—may need full rebuild.

Estimated cost: $300-650

Typical onset: 60,000-100,000 mi

Symptoms: sudden no-start with no spark, intermittent stalling when engine is hot, backfiring through carburetor, engine dies and won't restart until cool

Fix: Duraspark II ignition modules fail from heat cycles, especially on V8s. Module replacement is 0.5 hours, but diagnosis can add time if distributor pickup coil or coil is also bad. Keep spare module in glovebox—common roadside failure. Distributor rebuilds run 3-4 hours if bushings are worn.

Estimated cost: $150-500