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[Dishevelled Den]

I suppose I can't complain as this is the first real trouble I’ve had with the car – Z22XE engine) in the 5 years (approx) of ownership

It happened the other day after I got past some nose pickers by using the modest acceleration that the car has.

I let the speed bleed off on a light throttle back to where it had been before, as the speed decreased there was a pronounced triple hesitation in quick succession from the engine setting off the emissions light.


My reader (thanks Nige) tells me that code P0004 is present – described as Cyl 4 misfire.  The car seems to start and drive normally and there has been no decrease in performance, no overheating, water loss or inappropriate smells.

I was able to clear the code and turn the light out but am of course wondering what has set the events in motion – plugs, coil pack (or whatever the equivalent is) or impending gasket failure.

I will be looking at the easier options shortly but am asking for some views on the possibilities.

[tunnie]

i'd start with fresh set of plugs!

[PhilRich]

As you already know Den, No.4 is nearest the scuttle & as such is 1st in line for any water ingress from a leaking scuttle joint, so the best thing to start with is remove the coil (dis) pack & check for either water or oil in the plug orifices especially No.4!  Also of course, check the condition of the rubber plug covers on the pack & the condition of the plugs themselves & if they've been fitted a good while it may be time for a change as Tunnie says
I hope it turns out to be something & nothing, but please keep us posted?

[TheBoy]

Check for water or evidence of water around the plug, and signs of damage to cp

[Dishevelled Den]

Thanks T, PR and TB,  I'll do the simple job first and report back.

[cem_devecioglu]

problem is likely to be electrical.. checking sockets, ignition components are first on the list.. but before anything I would check the condition of misfiring cylinders spark..

[Dishevelled Den]

problem is likely to be electrical.. checking sockets, ignition components are first on the list.. but before anything I would check the condition of misfiring cylinders spark..

Thanks cem, I be doing that tomorrow.

[Jimbob]

saw the title and thought wet plug, hows the weather been, and are you parked facing downhill?

[SJKOO01]

Zoo Lou,

If the rubber spark plug cover do look as they've had it, the break part in your fingers (brittle) and don't seem to be the usual rubber give in them as they should.  Then you can get a replacement kit from your local dealer (4cyl - 9195820), they also come with fresh plug springs to.

Hope that helps 

[Dishevelled Den]

Always on a level surface and the weather has been not too bad lately in terms of rain JB

Cheers GM.

[markfree]

I suppose I can't complain as this is the first real trouble I’ve had with the car – Z22XE engine) in the 5 years (approx) of ownership

It happened the other day after I got past some nose pickers by using the modest acceleration that the car has.

I let the speed bleed off on a light throttle back to where it had been before, as the speed decreased there was a pronounced triple hesitation in quick succession from the engine setting off the emissions light.


My reader (thanks Nige) tells me that code P0004 is present – described as Cyl 4 misfire.  The car seems to start and drive normally and there has been no decrease in performance, no overheating, water loss or inappropriate smells.

I was able to clear the code and turn the light out but am of course wondering what has set the events in motion – plugs, coil pack (or whatever the equivalent is) or impending gasket failure.

I will be looking at the easier options shortly but am asking for some views on the possibilities.

I'm afraid I'm guilty of the aforementioned crime.

My wife said it's a miracle I can get out of the car the amount of bogey's nose-pickings there are on the floor mat 

My monies on the plug leads/dis pack being duff.

[Dishevelled Den]

Had a quick fiddle this morning and found the following;

As the plugs were extracted;



Front;



Back;



No.4 well;





Front of pack;



Rear;



Water bead on the support pillar at the front of the pack;



The well saturated area above the rear of the coil pack;



I've installed new plugs and will monitor the situation over the coming days.  It would seem that there has been some water ingress into the coil pack well as I found some condensation both in the well and on some areas of the pack body.  Oxidation seems to have developed in the two rearmost plug wells with no.4 being worst affected.

[Kevin Wood]

Looks like it might be prudent to try and seal the scuttle cover a little better where the who halves join? Failing that, is water getting behind the windscreen seal and running down the underside of the scuttle cover?

Kevin

[Dishevelled Den]

Looks like it might be prudent to try and seal the scuttle cover a little better where the who halves join? Failing that, is water getting behind the windscreen seal and running down the underside of the scuttle cover?

Kevin

Yes I'll have to look at that K as I suspect it will cause further problems.

I'll dry out that foam insulating medium and get some black sealer into the area for a starter.

[Jimbob]

yup, same happened to ours, will worsen with the weather, seal the scuttle and all will be will