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The 4.3L V6 EcoTec3 engine may start showing the first symptoms of a carbon buildup problem around the 80,000-100,000 mile range. These symptoms include rough idling, sputtering at idle, unsteady acceleration, and decreased power. The only way to fix the issue is by walnut blasting.
3 Μαΐ 2022 · Unfortunately, GM missed the mark on a few things with this engine, leading to some common problems. The most significant problem is the failure of the AFM system. Other issues include carbon buildup in the intake manifold, clogged injectors, high-pressure fuel pump failure, and PCV valve failure.
28 Οκτ 2014 · The 4.3L LV3 V6 offers 285 hp and 305 lb-ft. of torque, with VVT and direct-injection. No turbo needed.
11 Οκτ 2021 · Performance: Despite some concerns about its power for heavy-duty trucks, the 4.3 V6 offers a good balance of torque and efficiency, making it suitable for daily commuting and offering decent fuel economy.
5 Ιαν 2024 · He was mad when they got rid of the engine; he wants a new truck and has no interest in a turbo 4, nor the fuel economy of an 8. I told him to just keep driving this one. What's problematic about the most recent 5.3? Is it still the same DoD related issues?
24 Φεβ 2024 · The most common problem with the Vortec 4.3 involves the idle control valve (ICV) and throttle position sensor (TPS). Both components mount to the throttle body and help control airflow, and both...
11 Σεπ 2023 · The best 4.3 EcoTec3 mods are a cold air intake, headers and cat-back exhaust, and ECU tuning. The 4.3 EcoTec3 V6 produces 285-297 horsepower and 305-330 lb-ft of torque when stock. With bolt-ons and tuning, you can make more than 325 horsepower and torque and have a much larger power band.
