The O2 sensor, also known as a Lambda sensor, is a little gidget just under and behind the engine block sticking out the right hand side. Developed by the Bosch engineering group – they made my windscreen wipers you know! – it monitors the proportion of oxygen in the exhaust gases and sends a message [...]

As the onboard diagnostics for the Eunos is limited I bought a multimeter also known as a voltmeter to be able to test connections to various things. I’m all for a bit of guesswork, but aside from attaching myself to the battery and the suspect part, I thought a multimeter would be a far less [...]

There’s scant information around for the 1989 onwards Eunos as regards to tapping into the diagnostics system, so I thought I’d stick a post together on how use it. You won’t get as much information from it as you will from later cars with an ODBII connection but it can give you an idea of [...]

There is a little black box – one of many – in my car that is apparently called a throttle position sensor or TPS unit for short. A friendly mechanic who came for a look said he could narrow Maurice’s problem down to either the AFM or the TPS – as I’d already changed the [...]

Pretty much the same as it does in any other car! But, I find a simple title is always the best and I’m beginning to think that in all matters relating to cars these days, especially after the past couple of weeks. I’m steaming that my MX5 is still sat in the driveway and I [...]

I’m getting quite into this diagnostic thing with cars – I like a puzzle to work out, a problem to solve and something to scratch my head about, so I did a bit of researching and came up with a list of the top ten reasons why your car will lose performance. Green ticks indicate [...]

While I’m waiting for my service kit to be delivered – as Royal Mail are taking their time – I thought it would be a good idea not only to know what the ‘gubbins’ under the bonnet looks like, what it is and how to replace it but what it actually does. If I was [...]