Good that you fixed it BUT keep in mind if anything similar happens remove the coils and sell them on feebay for any $ you can get. Then go genuine nothing beats genuine, fraud spend millions & millions of dollars on R&D so I assume they no what's good and what's sh*t

Good that it's fixed though.

Edited May 11, 201412 yr by Kosij

Except for diff bushes. They sure did f*ck up there

Edited May 11, 201412 yr by Phoon508

Ok, maybe not so fixed. Boost gauge is still on the blink. That said, I still think the new coils are good

Another possibility is that your battery is nearly stuffed or has a poor connection. I have a BF Typhoon, I had a couple of occasions years ago where weird things happened, including speedo & odo not working from startup, but if I stopped and restarted the car would come good again. Even though the battery was capable of starting the car, it's low voltage during start would cause the computers not to boot up properly. New battery and problem fixed. I don't recall this ever causing the boost gauge to stop working, but worth a thought. Easy enough to check the condition of your battery, and definitely time for a new one if it's becoming a bit slow to crank/start.

Good luck with it.

What sort of boost gauge? Pics?

Stock OEM typhoon gauge. Battery is approx 3 years old, has more CCA's than the manufacturers spec. It does seem a little hard to crank in the mornings? Today I had to go for the button twice in fact

That sounds about how mine was when it was causing issues. It never left me stranded but a bit slower to start. Another thing that may help but won't fix it is to wait til all the dash warning lights have cycled after turning the ignition on but before hitting the start button. I'm not normally patient like that - just turn the key and go straight for the start.

Relates back to the computers booting up properly, if they are up and running before the starter is engaged, they don't experience the voltage drop during the seemingly more critical boot-up phase.

Anyone able to help? I own a 03 Ba xr6 and the I have recently disconnected the battery and once I connected it back up my Speedo and rev count doesn’t work? Any ideas to why? 

Could be worth disconnecting and reconnecting again, and grabbing a multimeter to check all of your fuses.

Bit of an old thread here but I did find the coils assisted in fixing the issues.   I had also found a ground wire around the front of the bay which wasn't secured correctly, so after cleaning it & torquing it back down all has been well ever since.