Chevrolet Caprice Carburetor Guide for 1980-1990 Models
If your classic Caprice is running rough, stalling, or getting poor gas mileage, a failing carburetor is a likely culprit.
- First, identify if your Caprice has the computer-controlled E4ME Quadrajet by looking for electrical plugs.
- For computer-controlled cars, a remanufactured Uremco carburetor is the most direct replacement.
- For non-computer cars, an Edelbrock 1406 is a reliable and user-friendly upgrade.
- If you install a square bore Edelbrock or Holley carb, you will need a spread bore adapter plate for the stock intake manifold.
Is Your Caprice's Carburetor Failing?
A bad carburetor can cause a lot of headaches. The symptoms often start small but get worse over time. If you notice a few of these issues, it might be time for a replacement.
- Rough Idling and Stalling: The engine may shake, sputter, or stall completely when you're stopped at a light. This is especially common on hot engines with original-style Quadrajets.
- Hard Starts: Difficulty starting the engine, particularly when it's cold, can point to a carburetor problem like a faulty choke. If the car is hard to start after sitting for several days, the fuel bowl may be leaking empty.
- Hesitation or Sluggish Acceleration: When you press the gas pedal, the car might stumble or feel very slow to respond.
- Black Exhaust Smoke: Thick, dark smoke from the tailpipe means the engine is running too rich, burning too much fuel. This can be caused by a carburetor that is leaking fuel internally.
- Poor Fuel Economy: If you're filling up the gas tank more often than you used to, a failing carburetor could be wasting fuel.
- Strong Gas Smell: A noticeable smell of gasoline around the car, especially after it's been running, can indicate a fuel leak from the carburetor.
Choosing the Right Aftermarket Carburetor
Before you buy, you must identify what kind of carburetor your Caprice has. This is the most important step.
Critical: Computer-Controlled vs. Non-Computer Carburetors
Many 1981-1990 Caprice models use a Rochester E4ME, a computer-controlled carburetor. You can identify it by the blue two-wire electrical connector for the mixture control solenoid and a three-wire connector for the throttle position sensor. If you have this system, your simplest replacement option is a remanufactured E4ME. Installing a non-computer carburetor like an Edelbrock or Holley will require significant modifications, including a new distributor and abandoning the car's computer controls.
🎬 Watch: Step-by-step guide for swapping a Quadrajet to an EdelbrockBrand Options for Your Caprice
Your choice depends on whether you need a direct replacement for a computer-controlled system or if you have an older, non-computer model.
Tier 1: Remanufactured (Uremco)
For owners of a Caprice with the electronic E4ME carburetor, a remanufactured unit is the most straightforward choice. Uremco is a well-known supplier of these parts. This allows you to keep your car's original computer system functioning. The quality of remanufactured parts can sometimes be inconsistent; some users report success while others have had issues with units leaking out of the box. However, it is often the only option for a direct, bolt-on replacement for computer-controlled models.
Tier 2: Aftermarket Performance (Edelbrock, Holley)
If you have an older, non-computer Caprice, or are willing to convert your later model, brands like Edelbrock and Holley are excellent choices. These are new carburetors, not remanufactured.
- Edelbrock: Known for being very user-friendly and reliable for daily driving. An Edelbrock Performer series carb, like the 1406 (600 CFM with electric choke), is a popular choice for the Chevy 305 engine and is easy to tune.
- Holley: Often seen as the standard for performance and racing, offering a high degree of tunability for maximum power. They can be more complex for a beginner to tune compared to an Edelbrock.
Cost of Replacing a 1980-1990 Chevrolet Caprice Carburetor
The total cost will depend on the brand you choose and whether you do the work yourself or hire a professional.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Edelbrock, Holley) | $415 - $605 |
| Remanufactured (Uremco) | $280 - $450 |
| Shop Labor | $200 - $400 |
| Total Professional Replacement | $480 - $1005 |
Frequently Asked Questions
How do I know if I have a computer-controlled carburetor?
Look for electrical connectors on the carburetor body. The most obvious is a blue, two-wire plug on the top for the mixture control solenoid. 🎬 See how to calibrate the electronic Quadrajet on the car You will also find a three-wire plug for the throttle position sensor. If you see these, you have an electronic E4ME Quadrajet.
Can I replace my computer-controlled carb with a simpler one?
Yes, but it is not a simple swap. You will also need to replace the distributor with a non-computerized version (with vacuum and mechanical advance) and abandon the check engine light and computer functions. For most owners seeking a simple repair, sticking with a remanufactured electronic carb is the easier path.
What does CFM mean and what do I need for my Caprice?
CFM stands for Cubic Feet per Minute and measures how much air the carburetor can flow. For a stock or mildly modified 305 V8 engine, a carburetor in the 500-600 CFM range is ideal. A carb that is too large can hurt performance and fuel economy.
Should I choose an electric choke or a manual choke?
Most carburetors for this era, including the original E4ME, use an electric choke. An electric choke automatically adjusts for cold starts, making the car easier to live with. A manual choke requires you to pull a cable inside the car. For a street-driven vehicle, an electric choke is highly recommended.
Were there any recalls on the 1980-1990 Caprice carburetor?
No, searches of the NHTSA database did not find any safety recalls or technical service bulletins (TSBs) specifically for the carburetor on the 1980-1990 Chevrolet Caprice. Recalls found were for much newer model years and different components.
Helpful Videos
Technical Specifications
OEM Part Numbers: 17086004 17085004 17084004 17087124
Original carburetor is typically a Rochester Quadrajet 4-barrel with a spread bore mounting flange. Later models are computer-controlled (E4ME). Common engines include the 4.4L, 5.0L (305ci), and 5.7L (350ci) V8s.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Chevrolet Caprice:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Caprice's Carburetor Failing?
- Choosing the Right Aftermarket Carburetor
- Critical: Computer-Controlled vs. Non-Computer Carburetors
- Brand Options for Your Caprice
- Cost of Replacing a 1980-1990 Chevrolet Caprice Carburetor
- Frequently Asked Questions
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