Why does 1988 Cheyenne 4.3L die after about 5 minutes?

Answer 1

The 1988 Cheyenne 4.3L may die after about 5 minutes for a few possible reasons. These can include:

• A clogged fuel filter, which prevents fuel from flowing to the engine
• A weak fuel pump, causing insufficient fuel pressure and volume
• A faulty ignition system, which may prevent the spark plugs from firing
• A broken or worn timing belt, which prevents the pistons from firing
• A clogged air filter, which prevents sufficient air from entering the engine
• A faulty oxygen sensor, which can cause the engine to run too lean or too rich

It's best to have a qualified mechanic inspect the vehicle to identify the exact cause. This will allow the mechanic to make the necessary repairs to keep the engine running properly.