couple of questions

[hongkongfuey]

When its started from cold, runs rough, has got a bigger cam, but this morning , i pumped the brake pedal and it raised the revs, is that ment to happen?

Also put the clutch pedal down and the revs picked up, gearbox is always stiff when cold, didnt think the gears would drag that much to slow the revs.

Whats best oil to put in, as standard oil is too thick?

[kam-325i]

Oil will be thicker when cold.......an oil that is thin when cold, will be like water when warm.

The best oil is the correct grade,

The vacum for the servo comes from the intake system, so pumping the brakes will have an effect.

[hongkongfuey]

I can understand it would make the revs move, but takes them 100 revs?

[kam-325i]

My old Honda would rise around 300 - 400 rpm when you dipped the clutch when cold.

[Brianmoooore]

If the revs go up, and stay up, when you push the brake pedal, it suggests there may be a leak in the servo diaphragm.
However much the gearbox/clutch/whatever drags the idle revs down or up, the ECU should detect it and correct the revs with the ICV.

[hongkongfuey]

Are servo's a ball ache to swap? Icv might be duff then

[Brianmoooore]

Servo complete with brake master cylinder isn't hard to remove, but TBH, I've never tried to swap an E30 servo without disconnecting the hydraulic lines. Depends if the brake pipes will allow the master to move out of the way far enough.
Some of the M50/52 converters may have tried to fit a Clio servo with the master still plumbed up, and might be able to give you an answer.
I'd be checking out the TPS operation , it's adjustment and the adjustment of the throttle stop before hunting for a fresh ICV.

[hongkongfuey]

ill see if i can borrow a volt meter over the weekend to check tps, can you remember off hand the readings and throttle gap? thanks

[Brianmoooore]

There's no specified throttle gap - AFAIK it's set up using a special fixed valve in place of the ICV, and adjusting the stop for a certain RPM. A method I've used is to remove the ICV, block it, replace it, and then adjust the stop for a very lumpy idle, just short of stalling.
Best method is not to touch it in the first place, and don't buy a car that has been messed with!
Two of the three TPS pins short be short circuit when the throttle is closed, and open immediately the throttle leaves its stop. One of those pins and the third should short circuit at half to three quarters throttle.

[hongkongfuey]

ive got a bbtb so its been messed with, i have 2 icv's , one humms and the othe sort of humms but vibrates too?

ill check tomorrow, thanks