What is wrong with my MX-5? [NC Power loss]

Technical Area Engine, Transmission, Exhaust etc
1
  1. My model of MX-5 is: Series 3
  2. I’m based near: Oxford
  3. I’m looking for technical help or recommendations on: Dreadful power delivery.

If my MX-5 had a carburettor I would be pulling out the accelerator jet. I was pulling on to the A34 into a small gap and so had to accelerate rapidly. Was up to about 5k revs in 2nd and changed into third…nothing! No power at all. After 4 or 5 seconds it started to pick up and I got more and more power with no change to the pedal position and then all of a sudden I got bags of power and had to back off the accelerator.
At other times I can be driving along at a steady rate and then if a try to accelerate to overtake the power just dies. It’s really quite unsafe.
I have checked the air filter with is clean. Any ideas where to go next?

2

Have you read the fault codes?

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3

Could be sticky inlet gubbins or as suggested pull codes and see what it says

4

Unfortunately I don’t have a fault code reader.

5

They are very cheap and a good (small) investment for the future.

:heart:

6

Might be ignition. Get an obd reader. Good investment.

7

MAF sensor may need cleaning. Also, look at the spark plugs but it does sound like a fueling problem

8

Dodgy throttle position switch? Or poor connections on it, try unplugging and replugging the connection a couple of times.

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