I was beatin on my car, 87 Turbo 2, and i deffinatly popped off a vacuum hose. It's on the back side of the upper intake manafold ( the side facing the trunk), there are 4 vacuum nipples going up and down, its the third one down from the top, wheres this hose supposed to go?? can someone please look on their car and tell me! thanks

 

if you have a FSM check out the vacuum hose routing diagram. page 4B-5

 

i cant find it on there =(. ugh this is so anoying

 

You may be taking your upper manifold to find that one.

 

I wanna say it goes to the vacuum spider for the oil injectors.

 

sweet ill check in the morning

 

If it's the largest nipple, then yeah it goes to the oil injectors, but the other 3 should be smaller (around 6mm vs. 4mm). It varies between US and JDM manifolds, but there will be one that runs to the secondary throttle actuator & another that goes to the LIM between the oil injectors (anti-afterburn I believe). I can't think of what the last one would be; my UIM only has 2 nipples.

 

ill take a picture

 

If you have four nipples, the large one is for the oil injector spider. The bottom one is the only one that has vacuum coming from it and goes, as already said, to the water thermovalve a few inches to the left.

One of the other two (either can be used of those two smaller nipples) goes to the fuel injector air bleed nipple in between the two oil injectors on the intake manifold.

The fourth nipple gets capped off.

 

actually i took a video. I did a compression test, got 30 in the front, and 75 in the rear. I fear i have broken seals. Which i dont understand because i never let the car go lean and im boostin 14psi. Ughh, well anyways heres a video of the idle and such. Let me know if you think its blown. thanks...

http://www.youtube.com/watch?v=CmqqMkk9E7E

 

Well the compression test speaks for itself. 2 or more apex seals are likely toast. What fuel setup are you running, and is this the stock turbo @ 14 PSI? Depending on what wideband AFR gauge you have, the true air fuel ratio can be .10 - 1.0 points off from what you're reading.

 

Looks/sounds like it's time for a rebuild.

 

if thats the case then its up for sale
80k on body
10k on rebuild
street port
koyo radiator
1600cc sec
520 primaries
greddy front mount
s5 front bumper
apexi afc
greddy bspec2 boost controller
greddy turbo timer
tocico slave cylinder
oil temp, coolant temp, oil pressure, boost, and volt gauge
stage 3 bnr turbo
17" exel rims
5mm spacers
860-705-5920 for question

 

is it possible for the engine to run like this if it had a big enough vacuum leak?

 

You didn't list a wideband gauge. How were you able to tell it wasn't leaning out? IMO, I'd think with a BNR Stage 3, you might lean out at 14psi with only an AFC to tune it. All it takes is one time to lean out and the engine is done.

 

Oh, sorry its a AEM wideband. And its tuned for saftey, AFR's never go higher than 11.9

 

what kindof apex seals did you use?? i've heards that atkins are not good for much higher then stock boost because of the softness of the metal, on the other hand, the harder seals could have eaten up seal seat in the rotor and messed up the seal. I'm thinking with the higher boost + softer seal = short life.

Mazda OE apex seals, hardend outer edge and softer back metal for where it rides in the rotor, FTW.

 

you've heards? i think you might want to do a little more research before making these assumptions.

 

regular stock seals, from mazdatrix.com