Auto box problem

If the auto box is not slipping, and changing gear up and down like a good'un, and the fluid is clear, its most likely fine. These older Cit boxes are almost always totally reliable anyhow.

You dont mention if its a carb or FI engine, but I expect you to have a primary ignition problem such as the hall effect sensor, or crank angle sensor (when it gets abnormally hot), or some kind of slight flooding (especially if its a carb motor) / fuelling issue-- as depicted by your bouncing idle.

Tim..

the idle is far too fast, probably an air leak

The idle is obviously not correct so sort that first. If it's running weak at idle (which it sounds like as it's hunting), engaging drive and putting load on the engine is likely to result in it stalling.

First thing to look for is air leaks.

In news:1hp6b16.eykq0c1ad6y8sN% snipped-for-privacy@gmail.com, James Dore wittered on forthwith;

I really, really shouldn't read posts about CXs.. Where is it and how much do you want for it?

James Dore ( snipped-for-privacy@gmail.com) gurgled happily, sounding much like they were saying :

You lucky bastard...

Get thee onto snipped-for-privacy@yahoogroups.com and join the CCC

It's not the box. The 3HP22 in the CX rarely gives problems.

The corrugated air piping from AFM to plenum has got some small air leaks - as the engine moves, it's letting false unmetered air in. With the engine idling, give it a good wiggle - it'll probably falter.

Winding electrical tape around it will do as a short-term fix, replacing it is the proper fix.

Yep, changes fine and performs otherwise correctly. Phew!!

Whoops. It's an FI engine, with all electronic ignition.

I've got two votes for air leaks and one for sensors, which is very useful. I've been warned about the sensors by various CX and Cit club members, and am sourcing new ones this week. (The seller always carries a spare flywheel sensor in the glovebox of his own CX)

In the meantime, it's hunt-the-leak. Sounds like a welsh party game....

Cheers,

Which is exactly what happens :-) - and it gets worse when the engine gets hotter, which leads me to suspect that the air leak expands.

So, how does one go about tracking them down? I don't recall Haynes being too detailed, but I'll check again at lunchtime.

Cheers,

listen, with a tube if necessary, spray carb cleaner around suspect bits, like manifolds and pipes, when the engine changes note you have found the leak, repair as needed, as someone else said air pipes can crack in hard to spot places

Mrcheerful

Already in the CCC, that's how I found the CX Centre over in Cambs. Will join the yahoo group though.

Good, good.

This is just the sort of info I'm looking for, I'll give it a whirl at lunchtime.

Although just let me check - AFM = Air Flow Meter?

Cheers,

James Dore ( snipped-for-privacy@new.ox.ac.uk) gurgled happily, sounding much like they were saying :

Ah, OK - in that case, ask in the forums on the club website, too.

Good ol' Roger B.

Yup.

I had the impresson I was a young(ish) acolyte seeking an audience with the high priest...

Right, bingo. If the AFM is the big metal thing on top of the air filter box, just behind the drivers' side headlamp and has a large (2-3 inch) diameter rubber hose coming out the top, then that proved to be ok. What wasn't ok was the smaller hose sprouting off one of the unions on that large hose.

It had a split, almost half way round it, and was making a loud hissing noise. Sealing it up immediately smoothed out the idle, and it's now bound up with insulting tape.

Question now is, what's that hose called? And am I best off ordering a whole set, rather than one item? It didn't look perished from the outside, but I've had apparently good hoses fail on me before.

Cheers,

James Dore ( snipped-for-privacy@new.ox.ac.uk) gurgled happily, sounding much like they were saying :

Gotcha.

I can't picture the setup visually, but it's almost certainly nothing rocket-science. Where's it go to? Breather, possibly? It's probably just a standard size hose available from any decent factor. If there's enough slack, chop an inch off the end and walk it round a factor or two.

Andy says: That one!

Cheers,

James Dore ( snipped-for-privacy@new.ox.ac.uk) gurgled happily, sounding much like they were saying :

Where's the other end go to? It's six years since I sold my GTi Auto.

Yup.

The pipe itself is only about 4-5 inches long, and is jubilee-clipped to a valve, which then has a pipe that runs under the air inlet manifolds, and joins up with the other end of the big plastic box that has the four big air feeds to each cylender on it.

(Is there a detailed diagram of this system anywhere?)

Cool. My CX-Fu approaches level one!

Cheers,

James Dore ( snipped-for-privacy@new.ox.ac.uk) gurgled happily, sounding much like they were saying :

The plenum. Sounds like idle air bypass, then, which would fit with the turnyknobbything in the middle of it - adjustment for that.

It's bog standard Bosch L-Jetronic. There's plenty on the web about it, and plenty of people in either CX-L or on the CX forum on the CCC site who've done stuff with it.

Ah, righto. I got new pipe on the way home, and all is well again.

Interesting, that'll make for useful reading over christmas!!

Cheers all,

Safe. Somewhere safe :->