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Shotgun Rider

Original Poster:

735 posts

55 months

[news] 
Friday 23rd December 2011 quote quote all
The idle on my car has been very erratic recently, fluctuating from 1200rpm to almost stalling at times though it never does actually stall.

The engine management light came on today and after connecting it to a fault code reader it gave me error code P0172, Fuel rich too high bank 1.

Any ideas on what could be causing this?

Ok, just realised this is half a bloody post!

It's a 2002 UK Spec 1.8 Sport!

Edited by Shotgun Rider on Friday 23 December 17:29

Shotgun Rider

Original Poster:

735 posts

55 months

[news] 
Sunday 5th February 2012 quote quote all
Can anyone help me on this?

seany87

430 posts

55 months

[news] 
Tuesday 7th February 2012 quote quote all
Could this be a MAF or 02 sensor??

Had this on my old Golf. Used to idle terrible and often cut out, and stank of fuel when cold. Changed both of the above and that cured it.

Shotgun Rider

Original Poster:

735 posts

55 months

[news] 
Tuesday 7th February 2012 quote quote all
Had it looked at today and was told that the O2 sensor is on the way out, so will replace that. He recommended that I get a genuine Mazda one, £200 at mx5parts!

My exhaust is blowing a bit too so I need to get that checked out too as he thought that could be an issue depending on where the leak is.

MX-5 Lazza

7,161 posts

104 months

[news] 
Wednesday 8th February 2012 quote quote all
I'd agree that you should use a genuine Mazda sensor but I'd get a know good used one from Autolink or MX5 Heaven.
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lynseywales

4 posts

31 months

[news] 
Wednesday 8th February 2012 quote quote all
I am currently experiencing exactly the same problem.
It started a few days after it's service. I took it to a different mechanic thinking it had somthing to do with the service.
It was thought that it had been given the wrong grade of oil, but it is still stalling when idling and feels rather jumpy.
Got it booked back in for further investigation but any ideas or tips would be great :-)

MX-5 Lazza

7,161 posts

104 months

[news] 
Wednesday 8th February 2012 quote quote all
I'd suggest the same as the other 2 i.e. plug leads.
The wrong grade of oil will not cause running problem. Do not take the car back to whoever suggested that nugget!!!

lynseywales

4 posts

31 months

[news] 
Wednesday 8th February 2012 quote quote all
Thanks for the info. I'm less than an but know it was fine before it was serviced.
Could this problem have anything to do with any interference when it was serviced?


stevensdrs

546 posts

85 months

[news] 
Wednesday 8th February 2012 quote quote all
lynseywales said:
Thanks for the info. I'm less than an but know it was fine before it was serviced.
Could this problem have anything to do with any interference when it was serviced?
Yes it could. Was the air filter changed? Could be the MAF sensor connection is loose or broken wire or the sensor is fubar.

lynseywales

4 posts

31 months

[news] 
Wednesday 8th February 2012 quote quote all
I hope they did! I've just trusted that they did everything on the invoice, but don't know to be honest. I'll give your suggestions to the guy on saturday.

MX-5 Lazza

7,161 posts

104 months

[news] 
Thursday 9th February 2012 quote quote all
Hi again.
I've posted your problem to the Mazda-member forum. It's a collective of knowledgeable people all over the country with good working knowledge of MX5 engines that has been set up for exactly this sort of thing. There might even be someone local enough to take a look for you.

The thread is here...

Shotgun Rider

Original Poster:

735 posts

55 months

[news] 
Thursday 9th February 2012 quote quote all
I e-mailed mx5heaven about the O2 sensor but got no reply as yet so I've opted for a new one from MX5parts. I just want to get it sorted now!

lynseywales

4 posts

31 months

[news] 
Thursday 16th February 2012 quote quote all
I have the verdict on mine.

The air mass meter had burnt out. My mechanic believes it could have received a blast of dirt at its service which contaminated the element, leading to an eventual burn out.
It's running beautifully now, so I'm in love with my car again.

I was quite pricey though!

MX-5 Lazza

7,161 posts

104 months

[news] 
Friday 17th February 2012 quote quote all
How pricey?

Shotgun Rider

Original Poster:

735 posts

55 months

[news] 
Thursday 23rd February 2012 quote quote all
I'm going to change my MAF sensor next to see if that will make a difference as the O2 sensor did diddly squat. The ECU light came on this morning again!

I've seen MAF sensor with different coding on their labels, are they specific to each model? Mine is FS1E. Does any other Mazda model share this MAF sensor?
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