petros_rx7

Hello guys i convert my 93 fd to 99 spec solenoid system with black box.
I have question about 99 spec uim.
There are 2 main nipples one is connecting to purge solenoid and the other to black box . Were the map sensor are connected ? In 93uim i have extra nipple who is connected but in 99 as i said is only 2.
Is connected to this nipple ?

billyboy

That lower one you have circled is for the map sensor. On that side of the manifold, the other nipple is for connection to the side of the black box....and there's the double throttle of course.

If there's some confusion, the purge was mounted to the manifold in the late cars. This might help with confusion https://www.rx7club.com/3rd-generati...folds-1152249/

petros_rx7

Thank you my friend you save me a lot of time.
Also i never imagine that the purge valve is going under the uim.

CREEPENJEEPEN

iTrader: (7)

It's possible to convert 93 rats nest to the 99 black box? Is it possible on USDM cars with a powerFC?

billyboy

I believe Petros has been doing that on an EU LHD over time, if the memory is accurate! Other than tidying up the area under the manifold with most of the check valves and solenoids now in one spot, functionally the new solenoids don't seem to offer a reliability advantage over the old style - and now the box itself introduces the potential for leaks, when exposed to temperature cycles over a few years.

j9fd3s

iTrader: (3)

connectors are different, all the brackets for things like the magic box, and the coils are different, its possible, Mazda did it, but its a lot of little stuff in addition to just the box

CREEPENJEEPEN

iTrader: (7)

Thanks for the response, everyone. It looks easier to maintain though. The heat issue can be addressed by ceramic coating your downpipe, or you could go a step further and ceramic coat the twin turbos as well. Anyway, I was checking to see if there was a write-up or something, but it looks like there isn't.

j9fd3s

iTrader: (3)

the "easy" button would be to buy everything off of the top of someone's engine, and run the 99+ wiring and ECU. then all you need to do is adapt the one plug from the ECU to the chassis harness.