no spark at plugs

[vipernut2270]

Hi guys,ive got a 1.6 mx5 turbo which usually starts first time,went to start it yesterday,its turning over but not firing,theres no spark at the plugs,do you think it could be the coil pack?,
grateful of any suggestions

[maser_spyder]

Going back to basics, spark is produced by coil and ignition system. Check the fuel cut-off too maybe? Not sure if that cuts out the ignition too?

Tried the distributor cap/rotor too?

[MX-5 Lazza]

maser_spyder said:

Going back to basics, spark is produced by coil and ignition system. Check the fuel cut-off too maybe? Not sure if that cuts out the ignition too?

Tried the distributor cap/rotor too?

Fuel cut only. No distributor on MX5.

It could be the coils but it could be a number of other things too. Failing coil pack usually results in misfire and/or running on 2 cylinders though that doesn't rule it out. CAS failure would result in no spark too. It's all just guesses though - probably something minor, it usually is.

[todd69]

Common failure on the MX5 with the coils, would be my starting point

[vipernut2270]

ive just tried the coil pack from my girlfriends mx5,still no good damn!
wheres this fuel cut off you mentioned?

[vipernut2270]

is the CAS easy to take off or would it be best done by a garage

[skinny]

cas is easy, it's the thing sticking out on the back of the left hand (as you look at the engine from the front) camshaft.

[vipernut2270]

is it just bolted on?

[DennisTheMenace]

Yes one 12mm bolt holds it in , and i would guess thats whats failed , I fitted the replacement engine in my 5 started it drove it 50 odd miles , parked it up and the next day it was dead ,Also get an led a paper clip and check your diagnostic codes
http://www.mx5oc.co.uk/forum/forums/t/204.aspx

[MX-5 Lazza]

Have you actually checked for a spark? i.e. Take out a spark plug, put the lead back on it then lay it on the head so the hex of the plug is in contact with the cam cover the turn the engine over to see if there is a spark.

[vipernut2270]

yes the AA guy checked and said theres no spark,when taking off the CAS,is it just a case of unbolt,remove and replace or do you have to line anything up,thanks for all the tips so far

[vipernut2270]

ok ive got the cam sensor out,is there any way of testing it?