engine dies and hard to crank

[kitkat]

when you say \"couldnt crank\" do you mean that there was absolutly no power? not even power to turn lights on?

if so ide suggest looking at the battery terminals and there connections.

[kitkat]

hmm only other things i can suggest is the Timing... maybe it may need to be advanced but im not sure how all that works on the NB.

Might need new Ignition leads, Spark Plugs or coil packs.

How does she sound when she's up and running?

[Russellb]

Dose the engine sort of slow down and then stop like pulling up at the light with out using the clutch?
How many K's has it done?
when it dose stop and you try to crank is the engine turning over slowly?

[Garry]

Check the fuel pump relay

[kitkat]

hmm well easiest way to think of it is...

you basically need 3 things for the engine to run.

Fuel (so maybe theres no pressure in the rail. dont know if it would work but when it happens, dissconect a fuel line and see if theres pressure there, might be a better way but i dunno.

Air So it could be to do with, TPS, AFM.

Spark Coils, Leads, Plugs.

Maybe someone can add to that if im missing things...

But basically try to narrow it down first.

[bigdog]

Where abouts are you Iam. If you're anywhere near one of the club and forum supporters like MX5 Mania etc then it would be quicker and simpler to get them to have a look for you and diagnose the problem. Most of the specialist shops will put their finger on the cause without you going through an extensive trial and error process.

[bigdog]

Mania are continually wrecking MX5s and have a good stock of s/h parts - give Simone a call.

[CT]

Could even be a CAS failing too. I wouldn't buy a new coil pack, just try either a second hand one or another CAS.

[JBT]

Could also be a simple case of a bad connection/loose wiring/plug going to CAS or coils.........or, as Kitkat suggested, plugs and leads.

[CT]

1.8 = back of exhaust camshaft.
1.6 = back of inlet camshaft.