help drastically needed

[redmx3]

hi, i own an mx3 but just swapped a klze from a 6 in there
two problems really
first it was smoking really heavy and then started to missfire
further inspection revealed that the plugs had been chaged from the 1.8 into the 2.5
after a change of plugs and a oil filter and flush, the miss had gone the the smoke still remains
there is no lamba sensors and i was advised to check for oil in the IM, and there was,
so im stuck, any help would be so greatly apreciated
kindest regards
chris

[Oddball]

Hi Chris, I take it you are the person who contacted me on ebay

I am assuming you have used the original 1.8 exhaust manifolds and downpipes, you are running a ZE ECU and a JE50 VAF, and the original O2 sensors are still in place ?

Not using the O2 senors is going to cause the ecu to run rich, you will get oil residue in the inlet neck, its part of the crank breather system, but if you have puddles of oil in there, then you have a problem, it might be that you may have connected up some vac pipes incorrectly that is causing the smoke.

Pics if you can of the engine bay, (dont worry if the reply does nto show straight away, new member pics and urls need to be authorised by a mod), and as much info on the change as possible.

We have a lad on here with a ZE lump in his MX3, i'm sure he will have some answers for you if asked.

Paul.

[redmx3]

hi
ye i was the one who contacted you on ebay
no, no lambas at all
standard 1.8 ecu
xs power 3 branch 2.5 manifolds and no cat modified to fit
am running the vaf it came with
there arent really puddles in the IM, its just wet
gunna limp up to jap fest so you can see
and i dont think it says JE50 on the VAF, think it says KL 36
thats just a guess cant rember exactly
cheers chris

[windy_mx6]

I would have thought the ECU and Vaf were essential on a ZE swap, mainly to aviod issues like these.

I thought the ZE should run on an MX3 vaf tho so its only the ecu that may be an obvious issue.

[Oddball]

Ok Chris ..

Well there are plenty of diagrams and helpfull info available here.. i would start by ensuring you have the correct vaccum and breather pipes how they should be regarding the oil. If you are using the 1.8 ecu, the the vaf you have is ok. The XS headers are i guess the same as the hotshot copies that are about at the moment, and they have the O2 sensor ports on them. I would highly recommend you get some fitted and plugged in.
Where did you get the ZE engine from ? and does it smoke as soon as you start the car, or a little time afterwards ? Is it only on acceleration ? overrun ?

Again, pics if you can, and dont be shy of asking for any help or diagrams.

Paul.

[redmx3]

got the engine from a place in kent
so couldnt hear the engine running
the engine came with an ecu, but didnt plug into the same wiring loom i had,
2 large plugs on the 2.5
4 smaller pluges on my current one.......i think or the other way around

diagrams with regars to the breather system would be great
also the maifolds currently have bolts in them
smoke happens when you rev past idle and gets worse the more you rev, this happens at any point
alos where do i get l;ambas from
an on further inspection im starting to wonder if, infact the engine i have is infact a DE
hope this helps

[Oddball]

Ok,

Think you are goiung to have to speak to garfy regards the ecu and what he did, he may have swapped the loom out for a 2.5.

Look in the suppliers section of the UK forum for links to O2 sensor suppliers, prices range from £30 - £65 .. the cheaper ones require you to cut off the original plugs and solder/crimp onto new sensor lead.

Pics follow of breather pipes... Ensure the PCV valve is working correctly, shake it it should rattle, you should only be able to blow through it one way, towards the inlet manifold. You are interested in the RED, BLUE, GREY and BLACK pipes in the picture.

[mazdamatt]

yea im sure u need ecu and vaf the mx3 v6 1.8 is a je50 vaf anyway

[redmx3]

dont have the original plugs though
could you post a diagarm of where the lambas connect to, ie plug side, cheers
i know of a chap called JONO on uk mx3 and he didnt have the prob on the standard ecu, so dont think this is the problem

[Oddball]

here you go ..wiring loom and sensors..

your looking for 2 O2 sensors.. one in each downpipe/manifold.

[redmx3]

that clears up a few things
what im going to do, is sort the lambas out
then post a few pics of the bay
maybe someone would be able to help with the wiring
got a few loose plugs lol and
connected a couple of wores together and the smoking has CALMED down lol really confusuing, i mean really confusing
had a mechaninc look at iot and he rekons it could be the piston rings
any possibility??

[redmx3]

A few piccys as you can see breathers off all over the place
plugs missing,
some dodgey split wiring
i know ive got work to do but some indication as to where to start would be great
cheers
chris

[Oddball]

Ok .. well we are in a bit of a mess eh ...

Right .... here we go ...

Pic 1 - it looks like the PCV hose is going to the rear breather pipe, and not the connection in the inlet manifold.. basically, you have got two breather pipes coming off the front rocker cover, the one coming out of the top of it, shoud be connected to the port on the NECK of the inlet manifold just behind the throttle body. The other breather pipe starts at the front of the rocker cover above the exhaust manifold, works its way around in a metal pipe, then goes rubber again and then connects to another metal pipe just under the throttle body... from the looks of the picture, these two pipes are the wrong way round and will cause you a smoke problem.


Pic 2 - Looks like an O2 sensor and is in the right area.

Pic 3 - Same again

pic 4 - Earth Strap, Should be connected to one of the 2 big mount bolts in the picture, above and to the left of your thumb.

pic 5 - Looks like the same O2 sensor.

pic 6 - dont know without seeing where it is, in the engine bay.

pic 7 - Woah .. water temp sensors not connected... does your rad fan come on straight away when driving ? if so you need that second water temp sensor connected, that being the one in pic 9.

pic 8 - Picture of a std 2.5 engine.

pic 9 - water temp sensor.

pic 10 - right .. top left looks like the rear O2 sensor connector. The thick black pipe in the back ground looks like either the brake servo booster pipe or the BAC/IAC vac pipe (attached to the bottom of the throttle body). The 2 vac pipes you have hold of could be anything .. use the vacuum pic i will post as a guide.


You mention you bought the engine in Kent, do you live in kent then ? if so i'm in faversham, if your close by, feel free to trip over and we can see what we can do.

Paul.

[redmx3]

unfortunately i live in weston sure mare
the fan does come on very quick but dont have the plug, going to take some parts off of an mx3 tmomrrow so mite see if it will fit
told you it was a mess
so ive got my breathers the wrong way around have i??
gonna be at jap fest sataday so you could always pop over and say hi
and i take it u said a std 2.5 that i actually have a KLDE then???

[Oddball]

From the picture, yes it looks like your breather pipes are the wrong way round at the inlet manifold end..

Was the loom already in the car ? just wondering why the plugs are cut off ? in that pic you have 2 main water temps and your dash water temp guage sender. The dash sender wire is a simple single wire onto a brass sensor. Then you have a green and a black water sensor. One is for the fan (black) and one is for the ECU (Green). If the ECU is looking for a bacl sensor input and does not get one, it will fire in the fan as soon as the engine starts for safety.

From the picture, and looking at the inlet manifold, i would say you have a std 2.5 litre v6.. it might be that the previous owner used a std inlet manifold.. so .. look through no.4 and 6 inlet runners at the side of the rear head and you will see a stamp.. either KL-1A1 or KL31-1A1 ..

We shall see you at japfest, and get sorted what we can... You should hopefully notice the smoke settles down after putting those breather pipes on the right way around ..

Paul