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4.3 Vortec Idle Problems


Jun 8, 2022

Is the 4.3 Vortec a good engine?

Most truckers driving a Chevrolet pickup or truck featuring the 4.3L V6 Vortec engine have clocked more than 400,000 miles. So evidently enough, the 4.3L V6 is a very durable and resilient 6-cylinder engine produced by GM. Hence you can rest assured the 4.3L Vortec is a very reliable engine that you can use for years. via

How much horsepower is in a 4.3 Vortec?

GM 4.3 Liter V6 Vortec LU3 Engine

Type: 4.3L Gen1e V6 (LU3)
Fuel system: Sequential fuel injection
Fuel type: Regular unleaded
Horsepower hp (kW)
Chevrolet Express: 195 hp (145 kW) @ 4600 RPM


How many miles can you get out of a 4.3 V6?

Conveniently, the 4.3L V6 with the lowest fuel economy has the larger 28.3-gallon tank, so you'll still get a decent 425 to 566 miles. All evidence points to the fact that you can't do much better than a Silverado if you want something that's reliable and long-lived. via

How do you replace the idle air control valve on a Chevy? (video)


What is so special about a Vortec engine?

The redesigned cylinder heads of a Vortec engine provides for improved combustion efficiency. The intake ports (reshaped) of the engine provides for better cylinder filling and fuel atomization by promoting higher air flow velocities to the combustion chambers via the ports. via

How do I get more power out of my 4.3 Vortec?

  • Replace your air filter. The air filter gets dirty over time and restricts the flow into the engine.
  • Install a performance chip or reprogram your current computer. You can replace your car's ROM chip with a performance chip that will boost horsepower.
  • via

    Is the 4.3 Vortec an LS?

    The 4.3 would last all the way until 2014, when it, like the shorter-lived LS family, would be replaced by GM's 'Gen V' six-cylinder and eight-cylinder motors. Although a 4.3L version of this new engine family is currently available, it's completely unrelated to the one that came before it. via

    What transmission does a 4.3 Vortec have?

    4.3 Vortec Transmissions

    All Chevy 4.3L Vortec engines were paired with a 5-speed manual transmission made by General Motors. Variants made after 2014 were made with a General Motors 6-speed automatic with manual shifting mode. via

    What does S stand for in S10?

    The Chevrolet S10, also known as the S-10 or S-Series, is a midsize pickup truck marketed by General Motors since 1981 primarily across the Americas. The S10 was introduced for the first time in North America as the S-10. A variant of that model launched several years later in South America. via

    What does Vortec stand for?

    Vortec is a trademarked name for a line of gasoline engines for General Motors trucks. The name first appeared in an advertisement for the 1985 model year 4.3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber, creating a better air/fuel atomization. via

    What is the most reliable GMC truck engine?

    Pentastar V8

    This is a 3.6L V6 engine with an aluminum block and has been awarded as the best engine on Wards Auto 2019. via

    What is the biggest Vortec engine?

    At an impressive 8.1L engine size, the Chevy 8.1 Vortec is the largest engine to be featured in consumer-class Chevy vehicles. via

    When did Chevy stop making the 4.3 V6?

    The original engine family was phased out in early 2014, with its final use as the 4.3 L (262 cu in) V6 engine used in Chevrolet and GMC trucks and vans. Its phaseout marks the end of an era of Chevrolet small-block engine designs dating back to the 1955 model year. via

    Does the 4.3 V6 have AFM?

    All 4.3 EcoTec3 systems and operations are controlled by E92 Engine Controller. It is also responsible for GM's Active Fuel Management (AFM) technology. AFM is a cylinder deactivation feature that switches off two cylinders under light loads for fuel economy. via

    How do I know what 4.3 engine I have?

    Locate the GM 4.3 engine serial number on the left (remember, engines are always viewed from the rear; if the engine were in a vehicle, the left side is the driver's side) front bank under the cylinder head. Record the last two letters of the number. via

    How much power can a 4.3 make?

    The result was 301 hp at 5,500 rpm and 312 lb-ft at 4,700. Puny, but let us remind you that it's still 50 hp per cylinder (a similar 350 V-8 would make 400 hp), which is pretty good for the very mild parts we used.
    Chevy 4.3L 262ci V-6 - The 3/4 350.

    The Buzz of Power
    3,800 216.4 299.1
    3,900 224.9 302.9
    4,000 232.4 305.1


    How much horsepower does a 2003 4.3 Vortec have?

    Used 2003 Chevrolet Silverado 1500 Base Specs & Features

    Base engine size 4.3 L
    Cylinders V6
    Base engine type Gas
    Horsepower 200 hp @ 4,600 rpm


    How much torque does a 4.3 Vortec have?

    In addition to new exterior designs, a new engine -- the 4.3-liter EcoTec3 V6 -- will be available to complement V8 options. This new V6 engine produces 285 hp, 305 lb-ft of torque and a towing rating of 7,200 pounds, which GM claims is best among standard V6 truck models. via

    What does LS stand for in Chevy engines?

    Let's start by taking a look at “LS”. LS stands for “luxury sport” and is what is featured in the names of most of the base models in the Chevy lineup. You'll find the LS label in certain trims of the following Chevy models: Chevy Trailblazer. via

    Is LT better than LS?

    The Difference Between LS and LT

    The LS will add on extra amenities – often nicer interior or exterior upgrades or more premium technology. The LT follows after the LS, offering even better features at a slightly higher MSRP. While these features vary from model to model, you'll notice a more luxurious feel overall. via

    Is there a 5.7 LS motor?

    The 5.7L LS1 V8 engine was produced by General Motors for use in high-performance vehicles such as the Chevrolet Camaro and Corvette, among others.
    GM 5.7 Liter V8 Small Block LS1 Engine.

    Displacement: 5.7L / 346 cu. in.
    Introduced: 1997 model year
    Discontinued: 2005
    Predecessor: LT1 / Gen 2 Small Block
    Successor: LS6


    Does GM recommend synthetic oil?

    Dexos is a synthetic oil developed by GM that is recommended for all 2011 and newer GM vehicles. via

    How much oil does a 1999 4.3 Vortec take?

    Engine Oil

    SAE 5W-30 is preferred. Capacity: With filter 4.5 quartsAfter refill check oil level. via

    Does Chevy still make a 4.3 V6?

    According to a recent GM presentation during the 2021 Work Truck Show, the naturally aspirated 4.3L V6 LV3 gasoline engine and naturally aspirated 5.3L V8 L82 gasoline engine will be dropped from the Chevy Silverado 1500 and GMC Sierra 1500 lineup for the 2022 model year. via

    Is a 4.3 A small block?

    The 4.3L Chevy V6 is among the strongest of production V6's ever produced, especially in its later versions. It was first produced in 1978 and that design stemmed from the 1955 Chevy Small Block V8. via

    What year 4L60E will interchange?

    700R4/4L60E/4L65E Year Ranges

    Year Ranges Transmission Pan/Filter
    1994-1996 4L60E Shallow
    1997 4L60E Shallow - Early Deep - Late
    1998-2000 4L60E Deep
    2001-2003 4L60E/4L65E Deep


    What is the rarest S10 made?

    Among all the Chevy trucks produced so far, the S10 EV is the rarest of all. The electric S10 was powered by the EV1's detuned drivetrains which churned 114 horsepower. It is believed that when the EV1 was launched, Chevy engineers got inspired by its modular powertrain. via

    Did Chevy make a 4 door S10?

    In 2001, a four-door Crew Cab configuration was introduced for the Chevrolet S-10 and GMC Sonoma. via

    How do you test a GM idle air control valve? (video)


    What causes a car to idle rough and stall?

    Many different problems could result in a rough idle for your car or truck, including: dirty fuel injectors, clogged air filters, bad spark plugs, and a variety of exhaust system issues. Let's go over each of these causes in more detail and learn how they can be remedied. via

    How do you relearn idle? (video)


    Will IAC cause rough idle?

    1. Irregular idle speed. One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. via

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