Fuel pump replacement didn't help
11-10-2007, 02:02 AM
#16
Three Wheelin'
As for depressing the clutch, that won't tell you anything on an NA C4, it has the same basic hydraulic clutch circuit that is separate from the braking circuit (but shares a reservoir) as a C2. The 993TT has a hydraulically boosted clutch slave cylinder that uses pressure from the power steering pump, (this makes pedal really light and easy to depress, nice since pedal would be heavy otherwise, pressure plate has to hold 400+ lb/ft torque!) and has a separate accumulator for the clutch circuit mounted to the clutch slave cylinder. This goes bad often, BTW.
11-10-2007, 02:12 AM
#17
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11-10-2007, 11:43 AM
#18
Three Wheelin'
Thread Starter
Sounds like it's the electrohydraulic pump for the brakes like others have mentioned. Chris Walrod is right if it runs too much you might want to have the system checked and see if the accumulator is good, but 20 secs after starup and the shut off sounds ok. Should be able to push the brake pedal 20-30 times after you shut the ignition off and the pedal should be assisted before it goes hard. If you are using the brakes hard, might hear it running while driving.
As for depressing the clutch, that won't tell you anything on an NA C4, it has the same basic hydraulic clutch circuit that is separate from the braking circuit (but shares a reservoir) as a C2. The 993TT has a hydraulically boosted clutch slave cylinder that uses pressure from the power steering pump, (this makes pedal really light and easy to depress, nice since pedal would be heavy otherwise, pressure plate has to hold 400+ lb/ft torque!) and has a separate accumulator for the clutch circuit mounted to the clutch slave cylinder. This goes bad often, BTW.
As for depressing the clutch, that won't tell you anything on an NA C4, it has the same basic hydraulic clutch circuit that is separate from the braking circuit (but shares a reservoir) as a C2. The 993TT has a hydraulically boosted clutch slave cylinder that uses pressure from the power steering pump, (this makes pedal really light and easy to depress, nice since pedal would be heavy otherwise, pressure plate has to hold 400+ lb/ft torque!) and has a separate accumulator for the clutch circuit mounted to the clutch slave cylinder. This goes bad often, BTW.
Assuming that the fuel pump was the problem I didn't ask for the original part back
. I could have offered it to another Rennlister for just the shipping costs. Sorry folks.Once again many thanks.
