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View Full Version : 1999 miata keeps dying issue???



slammedyatta
04-03-2015, 01:13 PM
I have a 99 miata and its sometimes hard to start, yesterday it died at a stop light and wouldn't stay running after that. Tried driving it home and every time I let it get down to idle speed it would just die, is this is a fuel filter issue or a can sensor issue?

BoBo
04-03-2015, 03:45 PM
It could also be dirty egr or vacuum leak due to stale hoses around the intake manifold.

slammedyatta
04-03-2015, 05:07 PM
All the hoses are like brand new so dont thnk its that, whheres the egr located? Back towards firewall correct?

BoBo
04-03-2015, 05:27 PM
Yeah, at-least mine is located on the intake manifold near the firewall. You could just clean it with a q-tip and some solvent, but before you do all of that try a bottle of Techron fuel system cleaner if you can still manage to drive the car. It might just be a dirty injector assuming your spark-plugs & wires are in decent condition. When was the last time you replaced the fuel filter? hows your fuel pressure regulator doing?

slammedyatta
04-03-2015, 07:33 PM
Update: car started and ran fine, drove it to oreilleys up the road and scanned it and got a "p0134" code. Code definition: Heated Oxygen sensor (bank 1 sensor 1) lack of activity, I'm assuming its a o2 sensor?

Phatmiata
04-03-2015, 10:13 PM
Sounds like it.

BoBo
04-03-2015, 11:18 PM
I'm surprised a cel didn't pop up at the dash before you had it scanned for codes, but at least you found the problem. I recently replaced my 02 and my gas efficiency improved I'm sure yours will too.