I've got a 1994 3000 GT, bought it new. Been great for 22 years and used only in summer yielding 76,000 miles on it.

Asked by Mar 19, 2016 at 08:29 PM about the 1994 Mitsubishi 3000GT 2 Dr SL Hatchback

Question type: Maintenance & Repair

It's a manual trans. and sporatically the clutch will go limp, no pressure.  If I lift the clutch pedal manually back into position, it resumes proper pressure and works fine.  The clutch fluid it full. When I lift the pedal manually, it resumes proper pressure and works fine.  Any ideas what causes this?

2 Answers

10

You've got a dodgy cup in either the master cylinder (at the pedal end) or the slave cylinder (at the engine end). Internally, they are basically built like an old-school bike pump, with a rubber cup that slides inside a tube. As the cup is pressed down it squirts fluid out, into a metal tube and into the slave cylinder (which is then forced to open up). The opening slave cylinder runs your clutch (disengages drive). They often show a few signs of leaking when they are about to dog out (which yours certainly IS). Using a stethoscope (or just a rubber/plastic tube in your ear) you can sometimes hear them "squish" as they leak pressure, but unless you are going to attempt the repair yourself.... get thee to a mechanic ;)

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Sounds like master cylinder may need replacing. But at its age I would replace master cylinder, slave cylinder and the rubber hose that connects the slave cylinder to the firewall piping. Not that hard to do if you a little mech inclined.

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