Mazda Eunos (MX5) cutting out

Honest John Back Room » Technical matters
View Threaded
Sat 19 Jun 2004 19:05
Mazda Eunos (MX5) cutting out - MGspannerman
My wife's 1991 Eunos has recently developed an intermittent fault whereby it cuts out, but then readily restarts with no problem. There seems no obvious relationship to speed, conditions etc but may occur more when decelerating or stopped. It is so infrequent that it is difficult to see any pattern. The car is in excellent condition with only about 25k miles on the clock. I suspect some sort of relay problem, I had a similar thing on a Vauxhall once, but would be grateful for any thoughts or suggestions.

Many thanks MGs
Reply | Report as offensive | Link
Sat 19 Jun 2004 22:59
Mazda Eunos (MX5) cutting out - David G.I.Davies
Could be a problem with the crank angle sensor,but this is only a guess.I'd suggest you have the diagnostic codes read before replacing anything.An intermittent fault on the CAS would normally log a code 3.
Reply | Report as offensive | Link
Sun 20 Jun 2004 00:55
Mazda Eunos (MX5) cutting out - martint123
How to read diagnostics on the very cheap:-

www.mx5club.org.nz/maintenance/engine_diagnostics/

Fuel pump??, Air flow meter?? (one bit of this controls the fuel pump) you can short two pins of the diagnostic connector to force the fuel pump to run.
Depends how often it does it as to how easy to pin it down!

Martin
Reply | Report as offensive | Link
Sun 20 Jun 2004 10:30
Mazda Eunos (MX5) cutting out - MGspannerman
Thank you both for your suggestions, I will check out these points. The problem has only occured on a handful of occasions, and who knows may never recur. However SWMBO finds it somewhat disconcerting so I do need to have a go. Thanks!

MGs
Reply | Report as offensive | Link
Mon 21 Jun 2004 08:26
Mazda Eunos (MX5) cutting out - Andrew Moorey (Tune-Up)
A cutting out problem on an MX5 recently down to a faulty coolant temp sensor. This would be difficult to restart occasionally though.
The throttle body may need a good clean out, Remove the throttle body to do it and give the idle speed control valve a clean too.
Andrew


--
Simplicate and add lightness!!
Reply | Report as offensive | Link

Looking for a garage you can trust? Honest John's Good Garage Guide has thousands of reader recommended garages, plus how-to guides and tips on servicing.

The Good Garage Guide

From economical vans to those that have the largest payloads, we have a shortlist for everyone - click to find out which will suit your needs.

Undecided on which van to buy? Our Top 10 shortlists can help...