PONTIAC 337-05831B Am Throttle Body WWK77
fits model: Grand. make: Pontiac. year: 1994.
( Part Type: Throttle ), ( Ipn: 337-05831b ), ( Fitment Type: Direct Replacement ), ( Modified Item: No ), ( Manufacturer Warranty: Unspecified Length )
Review PONTIAC Am Throttle Body fits GRAND 1994
The **Pontiac 337-05831B 1994 AM Throttle Body (WWK77)** is a meticulously engineered component designed specifically for high-performance applications in select Pontiac vehicles from the early 1990s, particularly those equipped with the legendary **L98 7.0L V8 engine** or its variants. This throttle body is a critical part of the vehicle s fuel injection system, responsible for regulating airflow into the engine while working in tandem with the **Multi-Port Fuel Injection (MPFI)** setup. Crafted with precision, the **WWK77** designation indicates its compatibility with the **Automatic Throttle Control (ATC) system**, which was standard in many Pontiac models of the era, including the **GTO, Trans Am, Bonneville, and Firebird**. The throttle body features a **plastic housing with reinforced metal internals**, including a **throttle plate assembly** that ensures smooth operation and consistent throttle response, even under heavy loads. Its design incorporates a **throttle position sensor (TPS)** and **idle air control (IAC) valve**, both of which play a pivotal role in maintaining optimal engine performance, idle stability, and emissions compliance. This throttle body is particularly sought after by enthusiasts and restorers looking to preserve the authenticity of their classic Pontiacs, as it is a direct-fit replacement for the original equipment manufactured by **Delco Electronics**, a division of General Motors known for its reliability in automotive fuel systems. Whether used in a **street-ready muscle car** or a **showroom-quality restoration**, this throttle body ensures that the engine breathes efficiently while adhering to the strict emissions and performance standards of the time. Its durable construction and compatibility with aftermarket performance upgrades make it a versatile choice for both purists and tuners alike.
### **Analysis of Buying a 1994 Pontiac 337-05831B (Am Throttle Body, WWK77)**
#### **Overview**
The **Pontiac 337-05831B** is a throttle body (not a fuel injector) designed for **1994 Pontiac V8 engines**, specifically those with the **L31 (318ci) or L36 (350ci) code**, often found in trucks, SUVs, and some sedans. The **WWK77** designation refers to a specific variant of the throttle body, likely part of the **1994 model year updates** for emissions compliance. This part is critical for controlling airflow into the engine, influencing throttle response and emissions performance.
---
### **Pros of Buying This Throttle Body**
1. **Direct OEM Replacement**
- The **337-05831B** is an **original equipment (OEM) part**, meaning it is designed to fit perfectly without modifications. This ensures proper sealing, airflow, and throttle response, which is crucial for engine performance and emissions compliance.
2. **Compatibility with Common Engines**
- This throttle body is used on **1994 Pontiac V8s**, including the **L31 (318ci) and L36 (350ci)**, which were popular in:- **1994 Pontiac Grand Prix (V6/V8 models)**
- **1994 Pontiac Bonneville (V8 models)**
- **1994 Pontiac Firebird (V8 Trans Am, IROC-Z, etc.)**
- **1994 Pontiac Aztek (early models, though rare)**
- **1994 GMC/Sierra 1500/2500HD (V8 trucks)**
- **1994 Chevrolet/K5 Blazer (V8 models)**
- If your vehicle uses one of these engines, this is the **most reliable and easiest-to-find replacement**.
3. **Emissions Compliance**
- The **WWK77** variant was likely updated to meet **1994 emissions standards**, including **OBD-I (Onboard Diagnostics, first generation)** requirements. Using an OEM throttle body ensures the vehicle passes **smog checks** and avoids **check engine lights (CEL)** related to throttle position sensor (TPS) or airflow issues.
4. **Better Than Aftermarket Alternatives**
- Cheaper aftermarket throttle bodies may not fit as precisely, leading to **leaks, poor throttle response, or emissions failures**. The OEM part is **tested and calibrated** for the engine s airflow needs.
5. **Easier to Source Than Fuel Injectors**
- Unlike fuel injectors, throttle bodies are **less complex and more widely available** from:- **Pontiac dealers (used parts bins)**
- **eBay, RockAuto, or specialty auto parts stores**
- **Junkyards (if the engine is still in the vehicle)**
6. **Prevents Long-Term Engine Issues**
- A failing throttle body can cause:- **Stalling or rough idle**
- **Poor acceleration**
- **Increased fuel consumption**
- **Emissions failures**
- Replacing it early avoids **costlier repairs** down the line.
---
### **Cons of Buying This Throttle Body**
1. **Age and Wear of the Part**
- Being a **1994 part**, the throttle body may have:- **Worn-out seals** (leading to vacuum leaks)
- **Sticky throttle plates** (causing hesitation or stalling)
- **Dirty or carbon-built-up internals** (reducing airflow efficiency)
- If the part is **not cleaned or inspected**, it may not perform as well as new.
2. **Potential for Counterfeit or Mismatched Parts**
- Some sellers on **eBay or Facebook Marketplace** may sell **fake or mismatched throttle bodies**, especially if the part is not sourced from a reputable dealer.
- **WWK77** is a specific code buying a **generic "Pontiac throttle body"** without verification could lead to **fitment issues**.
3. **Installation Challenges**
- If the **throttle position sensor (TPS) or wiring harness** is damaged, the replacement may not work correctly.
- Some **1994 Pontiacs** require **recalibration** of the **ECU (Engine Control Unit)** after throttle body replacement, though this is rare for simple swaps.
4. **Cost Compared to Newer Alternatives**
- A **new OEM throttle body** (if available) may cost **$100 $200**, while a **used one** can be found for **$30 $80**.
- If the engine is **high-mileage**, other components (like **fuel injectors, sensors, or intake manifold gaskets**) may also need replacement, increasing total repair costs.
5. **Limited Longevity if Engine is Neglected**
- If the **rest of the engine is worn** (e.g., **valvetrain issues, oil leaks, or failing sensors**), replacing just the throttle body will **not fix underlying problems** and may lead to **frequent failures**.
---
### **Key Considerations Before Purchase**
1. **Verify the Exact Engine Code**
- Confirm your vehicle has either:- **L31 (318ci)** or **L36 (350ci)** with the **WWK77 throttle body**.
- Check the **engine bay sticker** or **VIN** to ensure compatibility.
2. **Inspect the Throttle Body Before Buying**
- Look for:- **Visible carbon buildup** (may require cleaning)
- **Sticky or seized throttle plates**
- **Cracks or warping** (indicates damage)
- If possible, **test the throttle response** (if the engine is running).
3. **Check for Accompanying Issues**
- A **failing throttle body** often indicates:- **Dirty or failing MAF sensor**
- **Worn throttle cables (if mechanical)**
- **Vacuum leaks (hoses, intake manifold gaskets)**
- Addressing these **prevents future problems**.
4. **Source from a Trusted Supplier**
- **Best options:**- **Pontiac dealer parts department** (guaranteed OEM)
- **eBay (sold by verified sellers with return policies)**
- **RockAuto or Summit Racing (new or used, well-reviewed)**
- **Avoid:**- **Unknown sellers on Craigslist/Facebook** (risk of counterfeits)
- **Parts pulled from unknown vehicles** (may have hidden damage)
5. **Consider Cleaning vs. Replacing**
- If the throttle body is **cleanable** (no major wear), a **throttle body cleaner** (like **CRC or Gunk**) may restore it for **$20 $30**, making replacement unnecessary.
---
### **Conclusion & Recommendation**
#### **Should You Buy This Throttle Body?**
**Yes, if:**Your **1994 Pontiac V8 (L31/L36) has throttle response issues, stalling, or emissions failures**.
You **cannot find a cleanable or functional used throttle body** at a reasonable price.
You **source it from a reputable dealer** to ensure it s the **correct WWK77 variant**.
You **inspect it for damage** before purchasing (or have it tested if possible).
**No, if:**The **throttle body is already clean and functional** (cleaning may suffice).
You **cannot confirm the exact engine code** (risk of buying a wrong part).
The **rest of the engine is neglected** (replacing just the throttle body won t fix deeper issues).
You **find a better alternative** (e.g., a **new throttle body, a used engine swap, or a different model year part**).
---
### **Final Recommendation**
1. **Best Case Scenario:**- **Buy a used OEM 337-05831B WWK77 throttle body from a trusted dealer** (e.g., Pontiac parts store or a verified eBay seller).
- **Clean it thoroughly** (use throttle body cleaner and a **throttle body brush**).
- **Replace any accompanying worn parts** (hoses, gaskets, sensors).
- **Test drive the vehicle** to ensure proper throttle response and no emissions errors.
2. **Budget-Friendly Alternative:**- If the throttle body is **cleanable and functional**, **spend $20 $30 on a cleaner** instead of replacing it.
- If cleaning doesn t help, **buy a used throttle body** and **inspect it carefully** before installation.
3. **Long-Term Solution:** - If the **engine is high-mileage or unreliable**, consider:- **A full engine rebuild** (if the block is sound).
- **A used engine swap** (if the current one is failing).
- **Converting to a different throttle body** (if emissions laws allow, though this may void warranties).
Details:
Most electronic parts are not plug and play. Shipping is via USPS or UPS. Please also use the pictures to ensure a proper fit. This 1994 Pontiac GRAND AM Throttle Body is in overall good condition.
Compatible with.
part #: 337-05831b price
- $217.75
specifications throobo:
- for models: Grand
- for makes: Pontiac
- for years: 1994
- part type: Throttle
- ipn: 337-05831b
- fitment type: Direct Replacement
- modified item: No
- manufacturer warranty: Unspecified Length
payments throobo:
- wallet: Apple-pay
- other
- credit card: Diners-club
shipping throobo:
- service: Expedited
- cost: $0.00
- class: Expedited
- type: Fixed
- transit: 3-7 Days
returns throobo:
- policy: Returns Accepted
- time: 30 Days
- paid by: Seller
offer throobo:
- sold: 0
- availability: In Stock
- options: Ship-to-home
- started: April 27, 2026
- quantity: 1
seller throobo:
- rating: 99.4%
- # reviews: 85525
- city: Las Vegas, Nevada
general throobo:
- Car Truck Parts Accessories > Air Fuel Delivery > Throttle Bodies
- condition: Used
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