224 replies to this topic

[pete l]

Yes, good call, worth a try.

[tmsmini]

yes, the purge valve has caused issues for other people.

[leepol83]

Unless the engine manages to get air from the carbon canister or rocker cover / oil filler cap.

Which makes me think it'd be worth blocking those off to see if they might be the source of the problem.

Thanks Chaps more food for thought
How would I block them off?

Edited by leepol83, 17 December 2020 - 10:51 PM.

[leepol83]

yes, the purge valve has caused issues for other people.

Sorry which one is The purge valve and what’s it do ?

[tmsmini]

This is a diagram from the workshop manual.

It is available in the pinned thread or used to be.

 MPi Engine Bay.JPG   66.62K   6 downloads

 

It is number 9.

 

Manuals:

https://www.theminif...-perhaps/page-3

Edited by tmsmini, 18 December 2020 - 02:17 AM.

[leepol83]

This is a diagram from the workshop manual.
It is available in the pinned thread or used to be.

MPi Engine Bay.JPG

It is number 9.

Manuals:
https://www.theminif...-perhaps/page-3

Brilliant that’s great Thank you
Is there a a way to test it’s operation or the purge valve ?
So if I clamp off or remove the small pipe that goes it to the purge valve and check running is that correct as that may be stuck open drawing in air ?

[pete l]

Yes, block off the pipes that go to the purge valve and the engine breathers. Do this on the inlet manifold, in case there are leaks in your rubber pipes. 

[leepol83]

Yes, block off the pipes that go to the purge valve and the engine breathers. Do this on the inlet manifold, in case there are leaks in your rubber pipes.

Looks like just one that goes to the purge valve ? Or do I need to block both ends I.e the one on the purge trace it back to inlet and clamp that aswell so both ends same on breather ?

[pete l]

I can't remember how many there are, but just the inlet maniflod end.

[pete l]

So, there are 3 to block off, 2 at the front and the brake servo pipe input

 

https://www.worthpoi...-mini-247486682

[pete l]

And carefully check the small pipe from the fuel regulator to inlet manifold too.

[tmsmini]

For testing the purge valve, I would just make one change at a time.

All the hoses should be checked and in good condition.

You can block off the purge valve output by pinching the hose or capping it at the manifold end.

[leepol83]

Ok had a play today again
Unplugged the purge valve no change
Tuck the pipe that goes to the purge valve off and sucks like mad in that pipe?
Blocked off all breather hoses no change
Did notice if I take if the pipe that goes from the IACV elbow upto the throttle body itself off the throttle body end and put my finger over it settles down and the revs are fine, still no steps showing thow through out all these tests.
Today I’m going to admit defeat I really have no idea what I’m doing and it’s really getting me down now, we tried
Thanks all for the help really appreciate it.
Lee.

[leepol83]

Had a little drive In the car today seemed ok and pulls nice, occasionally it reved up if I come to halt quick and does hold the revs up a little but does settle, I’ve been told that apparently the ECU is a self learning one so needs to be driven, I told him I wouldn’t have thought so as someone in the forum surely would have said this, is he right or talking nonsense?
Just to note this is the first time I’ve actually driven the car since the restoration.
Cheers
Lee

[tmsmini]

The ECU is self-learning to a certain extent.

All the sensors and adjustments need to be within spec for it to do this with no air leaks.

Terry

Edited by tmsmini, 19 December 2020 - 07:15 PM.