Fuel injection tune-up kits bundle the components most commonly replaced together when servicing an injector — typically o-rings, seals, filter baskets, and pintle caps — restoring a proper seal and spray pattern without the cost of full injector replacement. Worn injector seals are a common cause of rough idle, fuel odor, hard starting, or a fuel leak at the injector base, and often get overlooked until the injector itself is blamed. Browse fuel injection tune-up kits for cars, trucks, and SUVs to service your injectors correctly the first time.
