I've checked around the wheels/connectors/master cylinder, but I still can not find any leaks. The resevor almost completely dries after 300~400 miles of driving. Any ideas?

1995 Eclipse RS

I'm new to DSMs, but on the face of it, if the fluid is not ending up on the ground somewhere, it sounds like it's making through the vacuum booster and getting burned up with the fuel. Like I said, I'm not sure if this would apply to DSMs, just pulled my first one home 50 some hours ago. So, maybe some of the pros here can shed a better light on it. But in the mean time, check the vacuum line to your brake booster and see if there's any fluid in it.

I've never heard of a master cylinder leaking into the booster, then into the intake... not to say it can't happen though! Probably see some weeping where the two meet, if the master cyl was bad. You've checked all your lines - even at the junction on the firewall under the intake?

/>

'95 GS w/ t3/t4b
FMIC, diy piping & RFL BOV
MS2-Extra Fuel&Spark
50 lb/hr Holley injectors w/ 1:1 RRFPR
JE 8.8:1 dish w/ Hastings Rings
Eagle Rods w/ ARP bolts
ARP Head studs
Mild port/polish head
3" custom DP/cat section, 3" PIT catback
dual MBC - 12 psi / 20psi

Do you have any pedal "feel" problems?

MB

Captain Caveman

96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq
97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq
98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats
99 OZ 5sp Stocker 15.856 @ 85.97
99 GS stocker auto 17.7@77mph!

wiki home page:http://www.2gnt.com/index.php?d=bullettdsm

1995 Eclipse RS

This smells of master cylinder. Be sure to pull back the rug inside, and look under the insulation for leaks. You are just losing so much fluid, I can't believe you can't see a puddle forming, lol.

MB

Captain Caveman

96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq
97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq
98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats
99 OZ 5sp Stocker 15.856 @ 85.97
99 GS stocker auto 17.7@77mph!

wiki home page:http://www.2gnt.com/index.php?d=bullettdsm

I know you had said you checked around the wheels, but check the bleeder valves on the calipers for any fluid, make sure the bleed valves are tight.

Tim Reed
76 Colt Galant coupe
77 Colt Galant Wagon
91 GVR4 1350/2000 (Scrapped)
99 Eclipse GS (sold)
89 Suburban 4x4

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician

But the boost mating area to the master cylinder isn't open to the diaphram to the intake... Just curious, I've seen/changed probably 30 master cylinders and a dozen or so boosters on fleet vehicles and haven't had that happen. If the secondary punches out it'll piss all down the front of the booster, but haven't had it suck through. Granted these are Chevy/Ford, but I'd assume the boosters are built similarly. Otherwise you could loosen you master cylinder and have a wicked vaccum leak...

/>

'95 GS w/ t3/t4b
FMIC, diy piping & RFL BOV
MS2-Extra Fuel&Spark
50 lb/hr Holley injectors w/ 1:1 RRFPR
JE 8.8:1 dish w/ Hastings Rings
Eagle Rods w/ ARP bolts
ARP Head studs
Mild port/polish head
3" custom DP/cat section, 3" PIT catback
dual MBC - 12 psi / 20psi

did you look to see if any of the lines were corroded?