For owners of the classic 1984-1985 Toyota Celica Supra, encountering issues with the igniter is not uncommon. Finding direct replacement parts for these older vehicles can sometimes be challenging. However, a resourceful solution exists by utilizing igniters from the Toyota Cressida. This guide will walk you through the process of using a Cressida igniter in your 1984-1985 Celica Supra, ensuring your vehicle’s ignition system is back in top shape.
The original forum post highlights a practical workaround for Celica Supra owners facing a dead igniter. It explains that while direct swapping isn’t possible due to connector differences, adapting a Cressida igniter is a viable and cost-effective alternative. Let’s delve deeper into how this interchange works and what modifications are necessary.
Understanding Igniter Compatibility and Required Modifications
The key difference between the igniters lies in the cable attachments. The 1984-1985 Celica Supra utilizes an earlier style igniter with a round strain relief, whereas later models and Cressida igniters feature a rectangular strain relief. This means a simple plug-and-play replacement isn’t feasible.
View attachment 19248
Toyota Celica Supra Old Igniter Style with Round Strain Relief
To successfully use a Cressida igniter (typically from 1989-1992 Cressida or 1986-1993 N/A Supra models) in your 1984-1985 Celica Supra, you have a couple of options, both requiring some level of modification:
Option 1: Component Swapping
This method involves transplanting the electronic module from the newer Cressida/Supra igniter into your original Celica Supra igniter housing. Here’s a breakdown:
- Preserve Your Old Igniter Components: Carefully remove the black epoxied electronic module from the new (Cressida or later Supra) igniter.
- Transfer to Old Housing: Install this newer electronic module into your old, original Celica Supra igniter housing.
- Retain Original Parts: Keep all other components from your original igniter, including the heat sink, cable, and even the wires if needed.
This approach essentially keeps the external connections and mounting of your original igniter while upgrading the internal electronic module with a potentially more readily available and functional Cressida/later Supra component.
Option 2: Connector Splicing
Alternatively, for those comfortable with electrical work, you can modify the connectors:
- Cut Connectors: Carefully cut the connectors off your old, original Celica Supra igniter.
- Splice to New Igniter: Splice these original connectors onto the wiring of the new Cressida/Supra igniter.
This method allows you to use the complete Cressida/Supra igniter unit while ensuring electrical compatibility with your 1984-1985 Celica Supra wiring harness.
Important Considerations for Both Options:
- Heat Sink Compound is Crucial: Regardless of the method you choose, remember to apply new heat sink compound when reassembling the igniter. This is vital for proper heat dissipation and the longevity of the electronic module.
- Donor Igniter Models: Suitable donor igniters can be sourced from 1989-1992 Toyota Cressida or 1986-1993 Non-Turbo Supra models. These are often more readily available and can be found online or at auto recyclers.
View attachment 19247
Toyota Cressida and Later Model Supra Igniter Style with Rectangular Strain Relief
Why This Interchange Works
The fundamental functionality of the igniter remains consistent across these Toyota models. The Cressida and later Supra igniters are electrically compatible and designed to perform the same core ignition function. The modifications primarily address the physical connector and housing differences, allowing you to adapt a more common and potentially newer part to your classic Celica Supra.
Sourcing Replacement Igniters
Online marketplaces like eBay can be valuable resources for finding used Cressida or Supra igniters. When searching, look for terms like:
- “Toyota Supra Cressida Igniter”
- “89-92 Cressida Igniter”
- “86-93 Supra Igniter”
- “Ignition Coil Assembly Toyota” (as some listings may include both coil and igniter)
- “OEM Toyota Igniter”
Always verify the part numbers and images in the listings to ensure compatibility before purchasing. Part numbers like 89620-22480 or 90919-02154 are often associated with compatible igniters.
Conclusion
Replacing a faulty igniter in your 1984-1985 Toyota Celica Supra doesn’t have to be a major hurdle. By understanding the interchangeability with Toyota Cressida igniters and performing the necessary modifications, you can effectively restore your vehicle’s ignition system. Whether you choose to swap internal modules or splice connectors, this guide provides the essential information to get your Celica Supra back on the road. Remember to prioritize safety and consult repair manuals or professional mechanics if you are unsure about any step of the process.
References:
- Igniter Interchange – Cressida Igniter in a 1984-5 Supra: https://www.celicasupra.com/threads/igniter-interchange-cressida-igniter-in-a-1984-5-supra.122568/
- eBay TOYOTA 86-92 SUPRA 89-92 CRESSIDA OEM IGNITER COIL 89620-22480 DENSO: https://www.ebay.com/itm/274982478887
- eBay 89-92 Toyota Cressida Supra Ignitor Igniter Ignition Coil Assembly 90919-02154: https://www.ebay.com/itm/224890393811
