1. Safety First:
* Park the vehicle on a level surface, engage the parking brake firmly, and turn off the engine.
* Do not attempt any repairs while the engine is running.
2. Identify the Cause:
Carefully inspect the gas pedal assembly. Look for:
* Debris: Check for anything lodged under the pedal, such as leaves, rocks, or debris from the floor mat. Remove anything you find.
* Worn or Damaged Pedal Return Spring: The spring that returns the pedal to its idle position might be broken, weak, or disconnected. This is a common cause. Inspect the spring carefully and determine if it's functioning correctly.
* Binding or Sticking Linkage: The linkage connecting the pedal to the throttle body can become corroded, seized, or bind due to wear. Look for any rust, dirt, or obstructions along the linkage. Try gently moving the linkage to feel for resistance.
* Throttle Cable Issues: On some vehicles, a throttle cable connects the pedal to the throttle body. Inspect this cable for kinks, fraying, or binding.
* Vacuum Leaks: While less common for a sticking pedal, a large vacuum leak can cause the throttle plate to stick open, creating a similar effect. This is less likely to cause the pedal to physically stick, but would result in sustained high RPM.
* Throttle Body Issues: A problem with the throttle body itself (sticking butterfly valve) could mimic a sticking gas pedal. This usually results in elevated idle rather than a pedal sticking.
3. Attempt Simple Fixes (ONLY if you're comfortable with basic car repair):
* Remove and clean debris: This is the easiest fix.
* Lubricate the linkage: If the linkage is stiff, carefully apply a lubricant (like WD-40 or a specialized cable lubricant) to the moving parts of the linkage. Do not over-lubricate.
* Inspect and replace the return spring: If the spring is broken or weak, you'll need to replace it. You might be able to find a replacement at an auto parts store, but this usually requires some disassembly.
4. When to Seek Professional Help:
If the problem persists after checking these items, or if you're not comfortable performing these repairs yourself:
* Take your vehicle to a qualified mechanic immediately. A sticking gas pedal is a serious safety concern that requires professional attention. They have the tools and expertise to diagnose the issue accurately and perform the necessary repairs safely.
Important Considerations:
* Safety is paramount: Do not drive the vehicle with a sticking gas pedal.
* Proper repair is crucial: Improperly fixing a sticking gas pedal can lead to more serious problems and potentially dangerous situations.
* Consult a repair manual: A repair manual specific to your 1994 Isuzu Rodeo will provide detailed diagrams and instructions for accessing and repairing the gas pedal assembly and related components.
This information is for guidance only. Always prioritize safety and seek professional help if you're unsure about any repair procedure.
