slimwynn

hi all i'v just brought a 1990 xr3i and i'm having a few problem when it's cold.i'v put this down to the last onwers bodges take a look at these photo's if u would and see if u could see anything wrong cheers



this is on there when it's cold the car runs like a bag of poo and cuts out take this off and it runs fine




allso take a look at this bodge whats going on with this bolt

SafeChav

The top picture is as they leave the factory! That small connection should be blanked off!

Where does the large breather pipe go? Just venting to atmosphere?

slimwynn

to the bottom of the filter box

slimwynn

i'v just been out init and i'v noticed that drives like a rs turbo mfi with a dump valve

SafeChav

you what

slimwynn

u know when lift off the pedal in a rs turbo and the car jurks

SafeChav

Ah ok......i cant say ive ever had it THAT noticeable but yea.......

So you say that large breather is conencted to the air box?

slimwynn

yes this pipe u mean

SafeChav

Correct.

It looks like its had the air box replaced, im sure only the early cars with a remote ISCV have that connection, they have a pipe off the side of the inlet, to the ISCV, and then it recirculates back into the top of the airbox.

That bolt in there isn't pretty, but its doing its job! Look elsewhere i'd say.

First port of call, remove the ISCV and flush it out with brake cleaner, they tend to stick

slimwynn

ok m8 cheers for that i'll give it ago

slimwynn

bit of a problem here ISCV is missing

slimwynn

looks like someone as put the wrong air box on as i have found the wire for the ISCV

SafeChav

No you plank

Its on the side of the inlet manifold i can see it in the picture above LOL

slimwynn

oh dear

slimwynn

right i'll have another go

SafeChav

I'm noticing that very bling parcel string holding the airbox together

What year is the car? Because thats an 89 cast top half of the airbox, im pretty sure thats been changed!

slimwynn

bit of a bodge init the car is a 1990

SafeChav

Look for the part number on the lower half, you'll probably find its a 90 cast mark

slimwynn

havent come back with the air box part but.i think the tick over is good now i took off the ISCV like u said gave it a good clean,put it back together, started it up,it was a little better then i noticed the pipe going to it it was basicly sucking it self to death so nothing could get through does this make any sense?? would this cause a problem ?? it's changed now anyway the real test will be when it's cold i would think

SafeChav

I did notice the kink in the pipe! Meant to say about that.

See how it goes now.

One thing at a time

mentalasanything

Another pipe that gets blocked on the CVH is the crank case breather (The one that goes from the rocker cover on the right hand side down to the block) this can cause other pipes to "suck themselves to death". If you pull the oil filler cap off while the engine is running does it feel like it's sucking it back on, or pushing it off?

SafeChav

Suck themselves to death!

More like build up pressure! - it normally blows the oil cap off!

mentalasanything

That's what I was getting at, if it was pushing the cap off, even slightly, I was going to suggest cleaning the crank case breather pipe to help with the problems when cold. There's obviously a breathin gproblem here isn't there

SafeChav

no no no no no no you plank

You said blocked breathers can cause pipes to suck themselves to death.

I argued the point - a blocked breather will result in crankcase pressure, usually resulting in blowing the oil cap off or whatever lets go first (oil seals, gaskets, etc)

slimwynn

still having problems from cold m8 seems like the automatic choke is'nt working.it reminds me of the days of my 1.6 carb when my choke cable broke.stalling and splutering until warm

SafeChav

No choke on EFI mate, the ECU should adjust the fuelling and idle compensation.

Going to be a process of trial and error!

A compression test might eb worthwhile aswell, old CVH engines do tend to suffer.

iansoutham

Not completely self-adjustable. There is a base-setting on the CO which is the potentionmeter by the battery on the n/s wing. This is known to break internally, and the only solution is replacement, about Ł22 from Ford.

It is quite common, as it is next to the shock absorber turret, and can find itself suffering a lot of vibration, especially if the car is lowered / stiffened.

Check the CO, you will probably find that it is either way too high or way too low. Worth the time if it avoids you changing all the bits and pieces around it to no avail.

In relation to the airbox, there were 2 types of airbox fitted, hitachi valve (in the airbox) and the later ones like you have. You have had the wrong airbox retro-fitted. 1990 XR3i EFi MK4 Escorts had the ISCV on the inlet manifold, the XR2i normally had the ISCV fitted in the airbox. (unless anyone wants to correct me).

SafeChav

Thats a good point actually......

With respect to the ISCV's, theres 3 variations, i've not seen a Weber on a 3i, so i cant guarantee if webers were fitted to early 3i's or not.....

Very early EFI's had a Weber mounted on the airbox, as said.

The Webers proved very unreliable and changed over to remote mounted Hitachi items, on a 3i it was on the inner wing forward of the fuse box, on a 2i it was on the bulk head next to the EDIS etc (also changed to remote locations on cars that had Weber ISCV's are we re-called)

And finally the inlet manifold was changed and the Hitachi ISCV's were bolted directly to it.

slimwynn

the thing is when it's warm it runs ok

SafeChav

Could be your brake servo fucked!

slimwynn

could i just block the pipe off for the servo just to see if it's that??

SafeChav

Indeed!

I wouldnt try and drive it though

iansoutham

This was the official recall if the customer complained of "obtrusive variation of idle speed and comfort".

Strange though how many cars actually have had the "modified" ones fitted with the valve on the inlet manifold.

iansoutham

CO could still be out.

My other halfs 2000e Sierra is the same. Runs like a bag of dogs remains when cold, but is fine when warm. The CO is set @ 2.35V which equates to well over 1.5% standard

SafeChav

You lost me there mate what you've written seems to condradict itself (to me anyway lol )

iansoutham

Early cars had the ISCV on the airbox, but with all the extra pipes and extra distance involved, Ford actually made a "recall" which if a customer complained, involved putting a different manifold on and relocating the ISCV to the inlet manifold. Hence the different types of location. All later ones had the ISCV on the inlet manifold on later cars.

SafeChav

Yea.......but as ive said, the Weber was remotely mounted ont he airbox, and then ive seen 2i's AND 3i's with remotely mounted hitachi's aswell.............

iansoutham

All I remember is that the "remote" ones, i.e. airbox and wing mounted ones were replaced by the manifold ones.

We are talking on the same lines, I'm just explaining it badly

SafeChav

Yea, but im pretty sure the eaely cars with webers were re-called and had remote hitachi's fitted, as it was cheaper than changing the inlet!

iansoutham

Yeah, but they did not always cure the problem. In those instances, the revised manifold was fitted.