need help urgently before my hair comes out

jordanmounfort · Post by **jordanmounfort** » Wed Aug 13, 2014 6:25 pm

hi every body i have recently bought an mx5 and i have fully serviced it including all filters plugs leads, however i am wanting to know why it is running like crap

the symtoms are in the cold morning it will take a few cranks till it starts not first pop. it has to think about its idle for a few seconds

but mainly has a flat spot just off idle and if you stall it sometimes it wont start for as long as 5 minutes and can be imbaressing if you give it full throttle it some times starts. i relize i may have more than 1 problem

any ideas or starting points on these

BRM · Post by **BRM** » Wed Aug 13, 2014 6:51 pm

Everything plugged in?

Angreal · Post by **Angreal** » Wed Aug 13, 2014 11:11 pm

After market ecu?

GRUVBB · Post by **GRUVBB** » Thu Aug 14, 2014 7:43 am

I had issues with stale fuel. Simple job to replace fuel filter and disconnect fuel line and then pump fuel out and replace.

PLSEME · Post by **PLSEME** » Thu Aug 14, 2014 8:35 am

Also worth checking tha CAS unit on the back of the head

bgg846 · Post by **bgg846** » Thu Aug 14, 2014 8:20 pm

Check your bypass hoses arent blocked. They control your idle air controll valve which im pretty sure has an automatic choke. It started. I had a similar problem and later in life it started overheating. after siezing my engine i found they were packed with old rusty water.

bgnz · Post by **bgnz** » Fri Aug 15, 2014 4:44 am

checked your diagnostics readout? http://www.miata.net/garage/Engine_Diagnostics.html

GRUVBB · Post by **GRUVBB** » Fri Aug 15, 2014 10:35 am

bgnz wrote:checked your diagnostics readout? http://www.miata.net/garage/Engine_Diagnostics.html

Excellant post/link BGNZ!!

SKREEE · Post by **SKREEE** » Fri Aug 15, 2014 5:52 pm

Have you noticed a increase in fuel use? if so check your o2 sensor/s depending on age of mx5.

I got some oil on mine a few months back and had similar problems just with mega fuel consumption and stuttering in the early rpm range.

I just cleaned mine with a singlet and all was fine after but they are cheapish and easy to swap out anyway.

4A-GE · Post by **4A-GE** » Sat Aug 16, 2014 8:49 am

I've been having similar issues. Suspect shitty battery or oxygen sensor. Plugs are 3000kms old. Guna pull them out today to see if they're covered in fucking rust again.

SLYDIT · Post by **SLYDIT** » Sat Aug 16, 2014 9:14 am

mate if i wasnt at home with the flu i would come around and have a look.

First thoughts are that the throttle body and idle valve need cleaning.
is the car totally stock or does it have after market stuff like extractors?

warrior · Post by **warrior** » Sat Aug 16, 2014 10:09 am

A crook battery can cause all sorts of problems, anyone wanting a cheap oxy sensor i have one that has done under 1000kms

warrior · Post by **warrior** » Sat Aug 16, 2014 10:12 am

Be very carefull cleaning the throttle body, mazda put a sealer in there against the butterfly and it can be rubbed off very easily. Go on ask me how i know

need help urgently before my hair comes out

need help urgently before my hair comes out

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