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EJ22 Ignition Relay Replacement Guide
Posted 14 June 2011 - 08:24 AM
After going down the very long and expensive road of troubleshooting of why my EJ22 would idle on 3 cylinders I found the issue to be the (infamous) Jideco ignition relay. Many hours of searching showed this as a common issue but the only resolution I've seen so far was to replace it with another used item of questionable condition or try and find a brand new one.
I have a solution for this which replaces the old Jideco relay with a pair of readily available aftermarket relays. Digging through some cars at a wrecking yard I found a common trend among ones with faulty ignition relays. Generally all pre 1992 models with AT seem to have this issue, in fact every one I have ever come across has shown signs of this problem. I own a manual pre 1992 model which does not have the idle issue. Among the few cars I saw in the wrecking yard, all series 2 AT models still had the original relay. If anyone can offer any more information on this please let me know.
Anyway, one can simply replace the Jideco relay with a pair of suitable aftermarket relays. I have used two Bosch 0 332 019 150 relays, these are 12V 30A relays and can be had for around $8 each. Just neatly make yourself a set of blade terminals and you can plug them straight into the caramel coloured factory relay plug.
I have been using this setup for almost two weeks and have had the benefit of testing it in various weather conditions and it's worked perfectly.
Relay Internal Diagram
Terminals, I just taped the relays together
Ignition Relay Plug Side
Posted 03 November 2015 - 04:50 PM
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