Big missfire on my v6

[cheffy34]

Thank you for this thread, it has reminded me why I gave up on petrol engines 20 years ago.

bet it made ya smile scanner

[bigdaddycain]

I'm VERY surprized the dizzy took on water like that, i'm even more surprized that it isn't electronic injection! I always assumed that the v6 had leccy injection... (i know what they say about assumption)...

Sellophane bag with holes for the leads, tape the holes up afterwards. Treat the dizzy/air filter as you would were you to jetwash the engine....

Don't understand this bit of wisdom Ste - they do have multipoint injection but still need something to distribute a spark to ignite the fuel........................

I think bigdaddycain means "Distributerless Ignition", i.e. 1 coil per 2 cylinders, or later cars 1 coil per spark plug (No damp problems).

Yes, sorry, you are quite correct bongosailor, i was thinking along the lines of a coil pack.

[bigdaddycain]

ANYONE HAVE SIX FINGERS

Only if i chop off four of mine!

There is a notion niggling at the back of my mind telling me that sudden heat change, i.e. drenching a hot lambda probe in cold water, can in fact kill it...

Is it located on the manifold, or the downpipe? Are you sure that any heat shields/splash guards are in place?

Could always use the spare four for some new style valve caps BDC

Constantly dishing out four revolving middle fingers?!... What a concept! Nice one cheffy!

[The Great Pretender]

Ok Cheffy........long shot.
It maybe posible your ECU has gone into limp mode or just being a pain.
Have you looked for a fault code?
Have you tried disconecting the battery overnight to see if the ECU resets?

PS


Wanna buy some cheap veg oil....................

[cheffy34]

HA haaaa I've been waiting for your wise words, did disconnect it for an hourish and pumped the brake pedal a few times but to no avail will do it over night see what that chucks up Ya don't reckon my theory possible then, on my new shiney sensor gettin cooked with raw fuel being chucked down the exhaust GP if i trusted myself to look for a code i would involves a led somewhere in the plug don't it and to be honest bein xmas and all that, at work is a mare need van for daily commute no day off till xmas day me thinks, can't leave it at a garage for diags my mate hasn't got the rite lead either, the other gaff i know got the software but no lead takes him ages to get his act together and i daren't take it to mazda visous circle really on with the over night theory and may the force be with me i have a cunning plan at this point


Oh
ps take it you saw my comment on the other climate control thread

[The Great Pretender]

I dont think unburnt fuel will kill it, it will cool it and make the ECU think it is running lean and over fuel to compensate. You also needs a reference air taken from the outside of the sensor, if that was full of water it would misread. Did you use WD40 in the air intake? If so that can kill the sensor

[cheffy34]

GP this is the kind of info i need, where do you reckon it would take the outside temp from wise one would it be by anychance the plastic shroud that sit around the outside of the sensor I'd have thought it would have dryed out b now if that so, but it may explain why the ecu wouldn't reset it the next wet moring, must get on with the overnight theory and take another look at the sensor didn't shove any conbustables down the air intake wen't straight to plugs and dizzy it not the first time it happened when i've hit alot of standing water, there is a gap between the undertray and the front plastic bitty which i assume is there to let the scav fan do its job correctly, unfortunately any water goin up thru there in force is on a direct collision course with the dizzy cap stupid design, so im gonna get on and make a splash guard for it but first the sensor although i was cursing the van to be fair it the first time it not limped home and let me down coming up for two years on and the weather was the worst, and the road is a nightmare you come round a corner and it's to late your in it you cant go around it cos there usually traffic oncoming what peeved me i've only had it working a week


Dar

[The Great Pretender]

PM sent Cheffy

[apole]

Hi Cheffy,

Sorry to hear you are having more grief, I think you'll have to give up all this road surfing.

Anyway, I haven't had this problem (yet !!) and have had to go through quite a bit of standing water.

There is an O ring on the disty cap, probably worth checking that out as it could either not be fitting correctly, or it could just be past it. I'd also be tempted to do something to protect the cap more, maybe make up something from a sandwich box with grommets for the HT leads. A bag maybe quite hard to make properly as there are 7 wires coming off and all different angles. Failing that just a sheet of plastic to protect from the spray may help.

I'd also check out the engine cover etc, I have no sign of water on any part of my engine bay so you may have a bit missing or misfitted.

Regarding the air intake sensor, yes there is one, part number 18845 in lushprojects under sensors and relays.

The air intake cowel on the V6 is quite high up, I'd be surprised if this got filled with water and there were no other issues but it's well worth checking.

Hope you get to the bottom of it all.

[cheffy34]

Yip darne typical get it sorted for a week and shibang peeved to say the least apole:evil:
reckon the prob will be the o ring, in the fact that there aint one not that iv'e seen anyway, goin with tgp's overnight theory at this precise moment in time, gonna sort some kind of shroud to go infront of th dizzy, will look at the gasket of some description but something tells me the sensor is gonna b a mare to sort again' thought it was to easy first time round, reluctant to fork out for another one , TGP has had some good usefull ideas and info so on to be a bookworm


Dar

[cheffy34]

Didn't do anything TGP


Dar

[apole]

Hi Cheffy,

I'd just get a new O ring from Mazda, Hughes Mazda is good, and they will post directly to you.

I'm also wondering if maybe you have some naff HT leads you know. Appreciate if the disty cap is full of water that won't help but I'd also be suspicious that if they are on the way out and they get wet, that will cause problems. The ECU will throw up an error as a result.

Have you pulled your plug leads off and checked if water has filled up the spark plug recess?

On my smart car I had a damaged HT lead due to an idiot garage not removing them properly (why use a proper tool when you can just yank the wire !!) and if you put a big load on the engine on a damp day, it would shut down the pot with the duff lead and the engine light would come on. Are we sure the light means that the heat sensor is at fault here, it could just be something else.

If it were me I'd get the HT side sorted out, new O ring, shield etc as well, disconnect ECU overnight. Then I'd check all the sensors I can find to ensure the contacts are clean and dry (use a proper cleaner here). Pity you can't find a place that can use a diags scanner to find out any errors logged.

You can test HT leads with a multimeter (allegedly) to ensure the resistance is about the same. Maybe worth it whilst you are at it.

Keep at it, I'm sure you'll fix it and learn from it.

Also take some pics of your undertrays etc, I can take a look at mine later in the week if you like, mine never gets wet so there could be a bit missing or not fitted properly there too.

[scanner]

Thank you for this thread, it has reminded me why I gave up on petrol engines 20 years ago.

bet it made ya smile scanner

Ahh yes I remember ignition problems in the wet..........but not fondly.


Signed a former mini owner.

[cheffy34]

but i can't help wanting another one infact i'm just waiting for one to drop in my lap for a toy I still read miniworld mag when i see one in whs .

[The Great Pretender]

So it's out in the cold winter air with the multi meter then....................or can you teach the Wife how to use it. .........Remember mini adults could be viewing your response.................