* If your Comanche has a 2.5L 4-cylinder engine: It likely *does not* have an EGR valve. Earlier models and smaller displacement engines were less likely to have them.
* If your Comanche has a 4.0L 6-cylinder engine: It *probably does* have an EGR valve. Larger engines were more likely to incorporate EGR systems to reduce emissions.
To know for certain, you need to:
1. Check your owner's manual: This is the best source of information specific to your vehicle.
2. Look under the hood: The EGR valve is typically a small, rectangular or cylindrical device near the intake manifold. It might have vacuum lines connected to it. However, visually identifying it without experience can be tricky. A diagram from a repair manual or online would help.
3. Check a parts catalog: Use your Vehicle Identification Number (VIN) to look up parts for your specific vehicle at a reputable online parts store (like AutoZone, Advance Auto Parts, or Napa Auto Parts). Searching for "EGR valve" will show if it's listed as a part for your Comanche.
Without knowing your engine size, it's impossible to definitively answer whether your 1986 Jeep Comanche has an EGR valve.
