New MX5 owner in Gold Coast

Flimbot · Postby **Flimbot** » Fri May 02, 2014 2:49 pm

It ran flawlessly yesterday and this morning. I thought I'd take it to work and let it sit in the rain, sure enough at lunch it ran rough. I ran it to Autobarn, and when I started it to come back it was fine. I'm pretty sure it smells much richer than usual when it's rough.

I'm thinking that it's something to do with moisture now, just hoping it's not some obscure wiring issue.

Let me know how you get on. Hopefully we can get both sorted!

DanielB · Postby **DanielB** » Sat May 03, 2014 9:12 am

So mine was a wiring issue.

Recently had the crank shaft pulley shear the bolts that hold it on clean off. As a result I replaced the pulley, timing plate behind it, and replaced the timing belt etc while it was all being done. The mechanic didn't secure the wiring for the crank angle sensor, and it was rubbing against the alternator belt... After one day it had worn through one of the wires completely. I soldered it back up, put heatshrink + electrical wire over it all to seal it back up and routed it up against the engine securing it along the way so there's no chance of this happening again. Pretty unimpressed with the workmanship of the mechanic.

Mr Morlock · Postby **Mr Morlock** » Sat May 03, 2014 1:05 pm

we all make mistakes- you should have gone back the the mechanic and at the very minimum told him what occurred. He would surely have rectified it - I have had work done and found a problem and still found an ongoing good business relationship

DanielB · Postby **DanielB** » Sat May 03, 2014 7:15 pm

I found it last night at 8pm, i don't think they'd still be hanging around :lol:

Flimbot · Postby **Flimbot** » Sat May 03, 2014 7:19 pm

Daniel, Glad you found your issue! Was it happening intermittently over the past week? I wouldn't even know where to start in finding bad wiring.

An update on mine: It happened a few times today, no moisture required.
I created a diagnostic led-resistor wire and hooked it up, but it only gave me one quick (half second maybe) flash when the ignition was switched. I thought it was supposed to go on for 5 seconds initially.

Last two times this has happened I disconnected the battery for a while, this has made it idle rough initially but once it's over that it runs fine for a while.

The saga continues...

Mr Morlock · Postby **Mr Morlock** » Sun May 04, 2014 1:53 pm

You guys should give up on the nonsense about 8B etc. The VIN tells you what the car is positively- if its a P2 it has VVT. If its runs rough or misfires it can be an number of things. You can just replace things or you can do swaps with a mate or if it can be reproduced in a workshop then a engine diagnostics guy can nail it.

DanielB · Postby **DanielB** » Tue May 13, 2014 2:23 pm

Sorry Mr Morlock? What was the need for that comment? You have your car listed as an NB8B too, so you obviously understand what it entails, whether it's the correct term or not. Obviously one can also look at the engine itself and tell if it's got VVT or not.