ACP A45004 Capri Fuel Sending Unit April Cyl. V8 5/16

( Brand: Acp ), ( Manufacturer Part Number: A45004 ), ( Part Type: Fuel Sending Unit ), ( Item Height: 22 )

Review ACP Capri Fuel Sending Unit Cyl. V8 5/16 Inch Pre April fits MUSTANG 1979-81–1981

The **ACP A45004 Fuel Sending Unit** is a meticulously crafted, high-performance replacement component designed specifically for the **1979 1981 Ford Mustang Capri equipped with the iconic 5.0L (302ci) V8 engine**, particularly those models with the **5/16-inch fuel line connection** as found in the **April 1981 variant**. This precision-engineered unit is built to restore and enhance the fuel delivery system of your classic muscle car, ensuring reliable operation while maintaining the authenticity of your vehicle s original design. The sending unit features a robust **aluminum housing** that resists corrosion and withstands the demands of high-performance driving, making it an ideal upgrade for both street and track applications. Its **sealed float mechanism** guarantees accurate fuel level readings, which is critical for maintaining optimal fuel pressure and preventing fuel starvation under heavy throttle conditions a common issue in high-output V8 engines. The **5/16-inch fuel line fitting** ensures a perfect, leak-free connection to your vehicle s existing fuel system, eliminating the need for modifications or adapters. Whether you're restoring a showroom-fresh Capri or pushing your classic to its limits on the racetrack, this ACP unit delivers the durability and performance you expect from a brand synonymous with automotive excellence. Built to exacting standards, it seamlessly integrates with the **Ford EEC-II or early fuel injection systems**, providing the precision fuel measurement required for smooth operation and peak engine efficiency. Trusted by enthusiasts and professionals alike, the ACP A45004 is more than just a replacement it s a legacy component that honors the engineering heritage of the Mustang Capri while ensuring your vehicle runs with the power and reliability it was originally intended to deliver.

### Pros and Cons of Buying an ACP A45004 Fuel Sending Unit for a 1979-81 Mustang Capri (V8, 5/16" fuel line, April 1981)

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The ACP A45004 is specifically designed for Ford V8 engines, including the 5.0L (302ci) and 5.8L (351ci) models found in the 1979-81 Mustang Capri. This ensures a direct fit without the need for extensive modifications, reducing installation time and potential errors.

ACP (Automotive Components Products) is a well-known brand in the aftermarket parts industry, known for producing high-quality, long-lasting components. The fuel sending unit is built to withstand the demands of daily driving, reducing the risk of premature failure.

A properly functioning fuel sending unit ensures that the fuel gauge in your Capri provides accurate readings. This is critical for avoiding unexpected fuel starvation or false low-fuel warnings, which can lead to breakdowns or unnecessary fueling stops.

The unit is designed for straightforward installation, typically requiring only basic tools. Since it is a direct replacement for the OEM unit, the wiring and mounting points should align without modification. This makes it an ideal DIY project for those comfortable with basic mechanical work.

While the price may vary, replacing a faulty fuel sending unit is generally more affordable than overhauling the fuel system or dealing with the consequences of a failing gauge (e.g., running out of fuel unexpectedly). It also prevents potential damage to the fuel pump or other components that could result from a faulty gauge leading to improper driving habits.

Replacing the sending unit proactively can prevent future issues, such as a complete failure of the fuel gauge or a malfunctioning fuel pump relay, which could be more costly to repair.

ACP parts often come with warranties, providing peace of mind in case the unit fails prematurely. Additionally, ACP has a reputation for customer support, which can be helpful if installation issues arise.

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As with many aftermarket parts, there is a risk of purchasing a counterfeit or low-quality imitation of the ACP A45004. Counterfeit parts may not fit correctly, function properly, or last as long as genuine ACP units. To mitigate this, always purchase from reputable dealers or authorized distributors and verify the part s authenticity.

While ACP is generally reliable, some owners report that the fuel sending unit may not last as long as they d like, especially in high-mileage vehicles or those driven in harsh conditions. If the original unit failed prematurely, it may indicate underlying issues (e.g., fuel contamination, electrical problems) that could affect the new unit s lifespan.

The cost of the ACP A45004 may be higher than some generic or no-name alternatives. While this is offset by the brand s reputation, budget-conscious buyers might hesitate if they perceive the price as excessive for a seemingly simple part.

In some cases, the fuel tank may be difficult to access due to rust, corrosion, or tight clearance in the vehicle s interior. If the tank is heavily corroded or the sending unit is stubborn to remove, additional labor or tools (e.g., a tank jack or rust penetrant) may be required, adding to the time and effort of the project.

If your Capri has aftermarket modifications (e.g., a modified fuel system, custom fuel gauge, or electronic fuel injection tuning), the ACP unit may not integrate seamlessly. In such cases, you might need to pair it with additional components (e.g., a compatible fuel gauge sender adapter) to ensure proper function.

While ACP parts are widely available, stock levels can vary depending on the region or distributor. In rare cases, you might encounter difficulty finding the exact part, especially if it s an older model. Always check availability before purchasing.

If the vehicle has existing electrical problems (e.g., corroded wiring, faulty relays, or a weak ground), the new fuel sending unit may not perform optimally. Diagnosing and fixing these issues beforehand is essential to ensure the unit works correctly.

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The ACP A45004 fuel sending unit is a strong choice for restoring accurate fuel level readings in your 1979-81 Mustang Capri, particularly if you value reliability, ease of installation, and brand reputation. Its direct fitment and compatibility with Ford V8 engines make it a practical solution for addressing a faulty gauge or preventing future issues. However, potential drawbacks such as the risk of counterfeit parts, mixed longevity reports, and installation challenges must be considered.

If you are confident in the part s authenticity, comfortable with basic installation, and willing to address any underlying electrical or mechanical issues, the ACP unit is highly recommended. For those on a tight budget or dealing with a highly modified vehicle, it may be prudent to research alternative brands or consult with a mechanic to ensure the best fit for your specific situation.

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1. **Verify Authenticity:** Purchase the ACP A45004 from a trusted dealer or an online retailer with a strong return policy (e.g., RockAuto, Summit Racing, or local Ford specialty shops). Check for authenticity markings or purchase from sellers with verified reviews.

2. **Inspect the Fuel Tank:** Before installation, inspect the fuel tank for rust, leaks, or damage. If the tank is compromised, address these issues first to prevent future problems.

3. **Test the Electrical System:** Use a multimeter to test the wiring and connections around the fuel sending unit. Clean corroded terminals and ensure proper grounding to avoid electrical issues post-installation.

4. **Follow Installation Guidelines:** Refer to the ACP installation manual or a reliable online guide (e.g., from a trusted automotive forum like Mustang Forum or Capri Club) to ensure proper installation. Pay close attention to wiring harness connections and sender float alignment.

5. **Monitor Performance:** After installation, monitor the fuel gauge for accurate readings and listen for any unusual noises or warning signs. If issues persist, double-check the installation or consult a professional.

6. **Consider a Backup Plan:** If you re unsure about the part s compatibility or your ability to install it correctly, consider having a mechanic perform the replacement, especially if your Capri has unique modifications or electrical quirks.

By taking these steps, you can maximize the benefits of the ACP A45004 and minimize the risks, ensuring a smooth and reliable upgrade for your Mustang Capri.

Details:

1979-81 Mustang Capri; Fuel Sending Unit; 6 Cyl. Comes with fuel sender filter screen gasket and float. Designed and manufactured to exact factory specifications this fuel sending unit will replace the original in both fit function. Comes complete with lock ring gasket and plastic float.

After years of use your fuel sending unit can wear out or stop working entirely. This 5/16 stainless steel sending unit will allow your fuel gauge to work properly provided the and wiring are in good working order. When that happens it can cause your fuel gauge not to register properly or even send incorrect readings. Ensure that you always know how much fuel actually have by replacing your worn out original with this quality reproduction sending unit.

specifications fueltanksysteme:

• for models: Mustang
• for years: 1979-81-1981
• brand: Acp
• mpn: A45004
• part type: Fuel Sending Unit
• item height: 22

general fueltanksysteme:

• condition: New
• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks

seller fueltanksysteme:

• rating: 99.6%
• city: Huntington Beach, California
• # reviews: 44923

returns fueltanksysteme:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

shipping fueltanksysteme:

• service: USPS Ground Advantage, UPS Ground, UPS 2nd Day Air, FedEx Ground / FedEx Home Delivery
• transit: 5-9 Days
• class: Standard, Expedited
• type: Calculated
• carrier: USPS, UPS, FedEx
• cost: $10.50

offer fueltanksysteme:

• started: February 15, 2026
• sold: 0
• quantity: 5
• availability: In Stock
• options: Ship-to-home

payments fueltanksysteme:

• credit card: Mastercard
• wallet: Apple-pay
• other

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