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Bomber

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  • Carnage on the Garage Floor
  • Donating Members
  • Member For: 14y 6m 15d
  • Gender: Male
  • Location: Gold Coast

Well, my young fella got me a new creeper for Father's Day so I jacked the car up with the intention to take the dump off and have a look. Before I got that far, I checked the actuator. Straight away, I noticed I could wiggle the shaft forward and back slightly with bugger all resistance so I was thinking no preload. Then I looked a bit harder. Pulled the shaft forward to simulate operation and found the problem. The back nut on the rod had come either come loose or hadn't been locked off. It was fouling internally on the fkn actuator bracket. Pushed it sideways and bit by hand and clunk, back to stop. Can you fkn believe it! Yeeessss!!!

Took it for a quick run and as expected I've got all my bottom end back. Obviously, the 'two stage' boost thinghy which I always suspected was mechanical, was when it was catching and didn't quite return to stop. It got worse with the new housing because the OEM connection is on the inside of the lever arm, not outside as MTA does them. The shaft had been offset a little to accommodate this but it meant the nut ran even closer to the inside hole on the bracket. When it was catching fully, it meant the depth of the nut (approx 4mm) was keeping the flapper open by presumably a similar amount. No wonder it wouldn't build boost.

Can't describe the level of relief guys. Bit hard to fix on the ground plus the preload will need to be checked so it will be done at the shop tomorrow.

So, there you have it. A fkn piss ant 20c nut was the root of all evil.

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  • Member
  • Member For: 18y 9m 13d
  • Gender: Male
  • Location: Brisbane

Im going to be the first - was this checked prior to retunes and dyno time? I would be pissed off if I had paid money to find a problem then work it out myself...

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  • Carnage on the Garage Floor
  • Donating Members
  • Member For: 14y 6m 15d
  • Gender: Male
  • Location: Gold Coast

Car only had a slight tweak after the housing swap. I think it's a classic case of not looking for the obvious first. I'm a loyal customer and the boys do right by me. I don't expect it will be any different this time around.

It was my decision to do the housing swap. True in the end there was nothing technically wrong with the MTA one, but I still don't regret swapping it.

I've learnt as I get older that doing your block when mistakes are made sometimes isn't in the best interests long term. I'm just totally relived that I will finally get to enjoy the car running spot on once the little fix tomorrow is done.

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