Cutting out when cold

[K10]

Doesn't that mean it might not be working tho?

<edit> Ignore me.. no it doesn't </edit>

Absolutely, it may not be working, but I presumed if it was disconnected the car would carry on regardless but would default to normal running (not warmup) mode.

Also, without a fault code I though it should be OK.

Plugs and wires replaced 8 months ago with T-belt.

[Steve]

Have you tried pulling out the leads and see if theres any moisture/oil on the ends? Maybe try reseating the leads on the coil. Prob won't help but its quick and easy.
<edit> nah, ignore that too </edit>

This thread is worth a read too :
http://forum.miata.net/vb/showthread.php?t=57415&page=1&pp=25

[K10]

Have you tried pulling out the leads and see if theres any moisture/oil on the ends? Maybe try reseating the leads on the coil. Prob won't help but its quick and easy.
<edit> nah, ignore that too </edit>

This thread is worth a read too :
http://forum.miata.net/vb/showthread.php?t=57415&page=1&pp=25

Thanks for that - tried it all, not the camshaft, luckily, and not the leads either. Reaching the end of my tether at this stage - going to sheck that the cam timing is OK, that it hasn't skipped a tooth, if not, then can anyone reccomend a decent mechanic for these in Cork?

[K10]

Thanks for that - tried it all, not the camshaft, luckily, and not the leads either. Reaching the end of my tether at this stage - going to sheck that the cam timing is OK, that it hasn't skipped a tooth, if not, then can anyone reccomend a decent mechanic for these in Cork?

Done - cam timing is fine. Dropped it to a mechanic today - his suspicion is the MAF sensor. Hopefully not, as they aint cheap.

Has anyone had a MAF issue where its replacement solved the problem, but it wasn't causing a fault code in the ECU?

[Fergus]

MAF.....do you mean AFM ?
You can borrow mine to try out if you want, I'm in Cork and won't be using my car for a few days.

[K10]

Fergus -

you're right, sorry, I meant AFM
I was just about to post up here about borrowing one from someone, you are a legend. I can meet you whenever suits you - just pm me - I'll send you my number.

Thanks,

[mx5ash]

If it does turn out to be that then i have one spare that i could be persuaded to let go off. Let me know how you get on.
Ash

[Fergus]

Well we've tested the car with my AFM & K&N, and the problem persists.
Even with the engine on and pulling the throttle cable in the engine bay it seems to be very slow responding (able to hear it sucking air into the AFM with the K&N on it and it's slow).
Seems like the engine isn't able to get what it needs.
Also, the throttle cable seems to be very loose.

[Steve]

Do ya reckon its the O2 sensor then? You say it sounds like its getting air so is it starved of fuel? Are all the rubber bungs on the intake manifold?

[Fergus]

Yeah manifold seems to be OK, when you tug on the throttle cable it takes about 1 second for the engine to suck air into the AFM. That delay is VERY long with a warm engine.
He's gonna change the fuel filter tomorrow and check the injector manifold.
That throttle cable REALLY needs to be tightened up though, there's about 2"s of slack on it

[leamyj]

I have a similar problem with my cable and I suspect the accelerator pedal mounting is not what it should be, just haven't got the time to check it out right now plus it's in a bloody awkward place.. I remember reading somewhere that this can be a problem with the 5 so will investigate further next week when I have a few days off, first days off since Christmas

John

[sspecdave]

Have you tried pulling out the leads and see if theres any moisture/oil on the ends? Maybe try reseating the leads on the coil. Prob won't help but its quick and easy.
<edit> nah, ignore that too </edit>

This thread is worth a read too :
http://forum.miata.net/vb/showthread.php?t=57415&page=1&pp=25

Thanks for that - tried it all, not the camshaft, luckily, and not the leads either. Reaching the end of my tether at this stage - going to sheck that the cam timing is OK, that it hasn't skipped a tooth, if not, then can anyone reccomend a decent mechanic for these in Cork?

Might be worth checking your coil pack aswell as had smiliar problem with a focus a while back and it turned out to be the coils.

Dave.

[K10]

Well we've tested the car with my AFM & K&N, and the problem persists.
Even with the engine on and pulling the throttle cable in the engine bay it seems to be very slow responding (able to hear it sucking air into the AFM with the K&N on it and it's slow).
Seems like the engine isn't able to get what it needs.
Also, the throttle cable seems to be very loose.

Cheers fergus for the help - much appreciated. I'm at a bit of a loss as to what the hell could be wrong now. Will try the O2 sensor I today. Hopefully...

[franksm]

I know you have had the cam-timing checked, but it still sounds like that is the problem. The car will be lethargic if it has skipped a tooth on the belt. The only way to check it is to remove the cam-cover and the plastic timing-belt covers - did your mechanic do that ?

Other than that, I would change the regular stuff (tech day fare) like sparkplugs, plug leads, fuel filter, oil. And then put a timing light on the thing just to 'make sure'.

You can read codes off the engine easily if it's an NA (see miata.net/garage), but an NB would need an OBDII reader (I think Anto or Diarmuid has one)

[K10]

I know you have had the cam-timing checked, but it still sounds like that is the problem. The car will be lethargic if it has skipped a tooth on the belt. The only way to check it is to remove the cam-cover and the plastic timing-belt covers - did your mechanic do that ?

Other than that, I would change the regular stuff (tech day fare) like sparkplugs, plug leads, fuel filter, oil. And then put a timing light on the thing just to 'make sure'.

You can read codes off the engine easily if it's an NA (see miata.net/garage), but an NB would need an OBDII reader (I think Anto or Diarmuid has one)

Cheers Frank - I checked the cam timing myself, and it is right, no doubt about it.

A timing light would be a good idea alright, changing the other bits today, will see what she behaves like then.

I have checked for codes - it's an NA, so just used an LED, nothing in there.