Whether you need exact original equipment specification parts or high-quality replacement parts, you can rely on ACDelco Emission components, Fuel Injection and Control Modules to deliver. With GM OE and Professional lines, your GM car, truck or SUV will run in tip-top form.
- ACDelco OE emission parts, fuel injectors and control modules earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditions
- Designed to meet rigorous OBD ll standards
Experiencing Acceleration or Idling Issues? It Might Not be the Throttle Body!
Poor acceleration, hesitation and other idling issues can be caused by failure of a variety of parts. Use the chart below to help determine which part is causing the problem.
| Part | System | Other Symptoms |
|---|
| Throttle Body | Fuel & Air | |
| Mass Air Flow Sensor | Exhaust & Emission | - Difficulty Starting or Turning Engine
|
| Air Filter | Fuel & Air | - Dark Filter Media
- Debris in Filter or Filter Box (Change every year!)
|
| Fuel Injector | Fuel & Air | |
| Vacuum Hose / Connector | Hoses / Lines & Clamps | - Hissing, Squealing or Sucking Sound from Cracked Connector or Hose (Use a Vacuum Tester)
|
|
Spark Plug or Spark Plug Wire or Ignition Coil
| Ignition | - Increase in Exhaust Emissions
- Visible Wire Damage
- Oil Leak
|
| Accelerator Pedal Position Sensor | Interior | - Limp Mode
- No / Delayed Pedal Response
|
 Installation Tips - Perform OEM Recommended idle relearn procedure. Some applications may require the use of an OBD Scan Tool while others may refer to the Owners Manual.
- A relearn of idle values can be forced by disconnecting the negative battery cable for several minutes in order to clear the electronic control module's memory.
- Several minutes of idling and highway driving may be necessary to relearn idle values. Electrical loads such as headlights, AC, radio, etc. should be turned off while relearning.
- Erratic idle or engine surging after installation of replacement unit may be resolved by putting a load on the engine. If idle evens out after shifting into gear, shift back into park and check idle RPM - perform relearn again if a drivability condition is present.
- Clean intake manifold mounting surface and replace Intake Manifold Gasket, if necessary.
- Inspect Air Cleaner Intake Hose for cracks and proper sealing - replace or repair with Multi-Purpose Sealant, if necessary.
- Check harness for broken wires and wiggle connector to try and reproduce the problem. Replace or clean Connector, if necessary.
- Clear all diagnostic trouble codes from vehicle computer prior to idle relearn.
ACDelco Quality ACDelco breaks down their premium portfolio of Original Equipment and Aftermarket parts into two tiers: GM Original Equipment and ACDelco Gold.
| GM ORIGINAL EQUIPMENT |
| GM Original Equipment parts are the true OE parts installed during production or validated by GM—designed, engineered, and tested to rigorous standards and backed by General Motors. |
| ACDELCO GOLD (PROFESSIONAL) |
| ACDelco Gold parts are the high-quality alternative to OE parts, manufactured to meet GM expectations for fit, form, and function and backed by General Motors. |
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