Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: HELP : MX5 mk2 SEI - No spark
Barkalarr
Contributor






Posts 940
Registered 14/3/12
Location Essex
Member Is Offline

Photo Archive Go!
Building: Caterham R300, Caterham Roadsport,Indy R1,Indy Zet

posted on 23/2/14 at 10:59 AM Reply With Quote
HELP : MX5 mk2 SEI - No spark

I have an MX5 mk2 SEI 1999 it will not start as there is no spark.
I have checked the coil pack and the 2 coils are both reading 9.54k ohms on the voltmeter (spec says 8.5 to 12.5).
I have also used the diagnostic diode to read faults but cannot find any code tables for the mk2, the codes I am reading are:-

1 long flash followed by 6 short flashes.
1 long flash followed by 2 short flashes.
1 long flash followed by 4 short flashes.
1 long flash followed by 1 short flash.

I have also changed the crank sensor and am about to replace the cam sensor when it arrives.
I have checked the location of the ECU and there is no dampness of any kind.
If anyone can help with the diagnostic readings It would be much appreciated as I am running out of ideas.

View User's Profile View All Posts By User U2U Member
rdodger

posted on 23/2/14 at 11:29 AM Reply With Quote
This may help.

http://www.miata.net/garage/Engine_Diagnostics.html


Code

Meaning


1

Ignition pulse


2

Ne signal


3

G signal


4

SGT signal (1.8L)


8

Airflow meter


9

Water thermistor


10

Intake air thermistor in airflow meter


12

Throttle position sensor


14

Atmospheric pressure sensor


15

Oxygen sensor (output too low)


16

EGR function sensor (1.8L)


17

Oxygen sensor (output not changing)


25

PRC solenoid valve (1.8L)


26

Solenoid valve (Evaporative canister purge)


27

EGR solenoid valve (vacuum)(1.8L)


28

EGR solenoid valve (vent)(1.8L)


34

34 Idle air control (1.8L)


36

Idle speed control valve

View User's Profile View All Posts By User U2U Member
dave

posted on 23/2/14 at 12:05 PM Reply With Quote
Dont know if this will help, but i had a similar problem with my MK2 and discovered that the crankshaft position sensor was too far away from the crank. I moved it closer and it work.
View User's Profile View All Posts By User U2U Member
Barkalarr
Contributor






Posts 940
Registered 14/3/12
Location Essex
Member Is Offline

Photo Archive Go!
Building: Caterham R300, Caterham Roadsport,Indy R1,Indy Zet

posted on 24/2/14 at 08:55 AM Reply With Quote
quote:
Originally posted by rdodger
This may help.

http://www.miata.net/garage/Engine_Diagnostics.html




Thanks, but at the top of this link it says "Note that this may not work for models newer than 1995 (OBD-II))"

Mine is a 99... any other ideas.... ?

View User's Profile View All Posts By User U2U Member
britishtrident

posted on 24/2/14 at 09:15 AM Reply With Quote
If it has an OBD2 port get the codes read with a scanner/dongle.

Coil packs faults will usually just give misfires and trying to test one with a multimeter usually is a waste of time.

The odds are it is either the crank sensor or an immobilisers type issue.


Crank sensors usually fail either due to broken internal or external connections or build of swarf crap on the business end
Older crank sensors were Vr sensors which you could test with voltmeter but if it is Hall-Effect it is more difficult.





[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]

View User's Profile View All Posts By User U2U Member
Barkalarr
Contributor






Posts 940
Registered 14/3/12
Location Essex
Member Is Offline

Photo Archive Go!
Building: Caterham R300, Caterham Roadsport,Indy R1,Indy Zet

posted on 24/2/14 at 11:15 AM Reply With Quote
All I've got is this diagnostic connector under the bonnet on the RHS (from the front)



Any more ideas?

View User's Profile View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content © 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [© 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.