Clutch slip or solenoid problem?
11 February 2007, 07:10 PM
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Clutch slip or solenoid problem?
Have posted this in drivetrain, but I am not sure that it is a clutch problem as I first suspected. 
Last night, I thought that I felt my clutch slip (have felt it before in an mr2 turbo). It happened when I was on the motorway and applied full throttle in 4th at 3000rpm. I drove carefully after that as I had a further 20 miles to do. Got home, parked up and went to bed.
Just been out for a 15mile round trip to make sure its the clutch.
After the first 10 miles, I starting applying full throttle in 4th at 3000rpm. No slip.
A little confused, I continued this technique another 20 or so times in 3rd, 4th and 5th. I also tried 2 'through the gear' runs. Didn't slip once. The only thing I did notice however (once only), was that when the turbo was at full boost at 3200-3400rpm in 4th, I felt a very slight dip in power and then it went back to normal. When this happened, the speed at which the revs increased, slowed down momentarilly and then continued to rise at the normal speed. (no sudden cut)
I think that when I suspected the clutch yesterday, I only felt the momentary drop in power and didn't see what was happening on the rev counter. As I said, it only happened once out 20-30 attempts.
The car is a MY UK Turbo running 280bhp/270lb/ft. It has a tek 2 map, full decat, sti 5 intercooler and alloys piping, green panel filter, original clutch and has done 56000miles.
Ever since I fitted the sti intercooler and piping a month ago, max boost
has risen from 15psi to 17psi. So I am wondering if it may be something to do with the wastegate or boost solenoid having to work harder/differently?
The car is running spot on other than that.
Just passed its mot aswell.
It is frustrating as I can't replicate the problem, if there actually is one!
Any help will be greatly appreciated!
Last night, I thought that I felt my clutch slip (have felt it before in an mr2 turbo). It happened when I was on the motorway and applied full throttle in 4th at 3000rpm. I drove carefully after that as I had a further 20 miles to do. Got home, parked up and went to bed.
Just been out for a 15mile round trip to make sure its the clutch.
After the first 10 miles, I starting applying full throttle in 4th at 3000rpm. No slip.
A little confused, I continued this technique another 20 or so times in 3rd, 4th and 5th. I also tried 2 'through the gear' runs. Didn't slip once. The only thing I did notice however (once only), was that when the turbo was at full boost at 3200-3400rpm in 4th, I felt a very slight dip in power and then it went back to normal. When this happened, the speed at which the revs increased, slowed down momentarilly and then continued to rise at the normal speed. (no sudden cut)
I think that when I suspected the clutch yesterday, I only felt the momentary drop in power and didn't see what was happening on the rev counter. As I said, it only happened once out 20-30 attempts.
The car is a MY UK Turbo running 280bhp/270lb/ft. It has a tek 2 map, full decat, sti 5 intercooler and alloys piping, green panel filter, original clutch and has done 56000miles.
Ever since I fitted the sti intercooler and piping a month ago, max boost
has risen from 15psi to 17psi. So I am wondering if it may be something to do with the wastegate or boost solenoid having to work harder/differently?
The car is running spot on other than that.
Just passed its mot aswell.
It is frustrating as I can't replicate the problem, if there actually is one!
Any help will be greatly appreciated!
Last edited by Gear Head; 11 February 2007 at 11:25 PM.
11 February 2007, 08:01 PM
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if you wan to test the Clutch, 30mph in 5th gear full throttle and when you get close to Peak boost (most strain on clutch) revs may increse but no gain in speed 
Clutch is or soon will be US IMHO
Tony
Clutch is or soon will be US IMHOTony
Last edited by T5NYW; 11 February 2007 at 08:51 PM.
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