Why won't my old AMC Rambler start or restart when hot?

Short answer: An old Rambler that won't start after sitting usually needs fresh fuel and clean points. A squirt of starting fluid tells you if the problem is fuel or spark. If it won't restart after a long idle or hot drive, think vapor lock, a weak fuel pump diaphragm or rubber fuel lines that rodents have chewed.

Symptom: The engine won't start after the car has sat, or it stalls after idling and won't restart until it cools.

What to check first

1. Try a short shot of starting fluid. If it fires briefly, it's a fuel problem.
2. Check for spark and look at the points.
3. Replace old gas with fresh fuel.
4. Look at rubber fuel lines for cracks and chew marks.
5. Check the fuel pump for leaks at the diaphragm.

Likely causes

1. Points and ignition after sitting. Points can corrode when a car sits, so it gets no spark.
2. Old fuel. Gas that sat for months won't light well.
3. Vapor lock. Fuel boils in a hot line or pump after a drive or long idle, so the engine starves until it cools.
4. Fuel pump diaphragm or chewed fuel lines. A leaking pump diaphragm or rubber lines chewed by rodents can let air in and starve the engine.

What it usually costs

Owners in these threads didn't post prices.

Is it safe to keep driving?

Stalling in traffic is risky, and a leaking fuel pump or chewed line is a fire risk. Fix leaks before driving.

DIY or shop?

Points, fuel lines and a fuel pump are DIY on these simple cars.

Recalls, bulletins and complaints in plain words

• Recalls: NHTSA lists 2 recall(s) for the AMC Rambler in these years, and none match this problem. Check your VIN at nhtsa.gov/recalls. If your car is part of a recall, the dealer fixes it for free.
• Plain words: The complaint count below shows how often owners reported problems that mention these words to NHTSA. A count is not proof of a defect.
• NHTSA complaints: 0 keyword-matched complaints for AMC Rambler / American (NHTSA lists under American Motors) 1964–1969 (of 0 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-29; keywords: start, stall, fuel, vapor, hot) (NHTSA returned no data for 20 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In 64 rambler won't start on Car Talk, a '64 Rambler American wouldn't start after sitting. Members said to check the points, suspect old fuel, try starting fluid to see if it's a fuel or spark problem, and see whether the engine turns by hand.
• In Did I need to let my 1970 AMC Rambler “relax” before shutting off? on Car Talk, a 1970 Rambler owner asked whether the car needed to idle before shutting off after long drives. Members discussed heat soak and vapor lock.
• In 1964 Rambler Classic Typhoon Issues on Car Talk, a '64 Rambler Classic wouldn't restart after idling. Members pointed to vapor lock, the fuel pump diaphragm, rodent-chewed lines and vacuum leaks.

Quick tip

Check rubber fuel lines on any car that's been parked a long time. Mice love them.

Vehicle focus: AMC Rambler (American and Classic), 1958-1970.

Safety / mechanic note

Fuel leaks are a fire risk. Verify with a mechanic.