I missed answering your question. The rpm meter fluctuates up/down with the condition. Cheers Tony

 

I'm not too concerned that you moved past the relay, but can you confirm that you're seeing 38 psi when you have the fibrillation? You're dealing with an intermittent issue, so I would expect everything to look perfect when it's idling or not running with the ignition on. If there are identical relays elsewhere, it would be simple to swap them to eliminate it from suspicion (unless you're confirming you see the fuel pressure maintained during an episode, but even then TBH).

I'd also check out that ground from the ECU that's labeled "earthed via park/nuetral switch" based on the other issue you had. Wouldn't hurt to shine up all the connections there and make sure the switch is operating correctly.

 

Sorry for delay in responding.
Ok, regarding the fluctuation in rpm, how much when it's happening? Another question, does it only happen in 4th/TV lock-up or will it happen in 1-3?

 

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