A 2.5 problem any help would be nice

Technical Area Engine, Transmission, Exhaust etc
1

Peeps I wonder if anyone has had this problem:-

So our 52 plate is now becoming a prob and we trial and race, so this is what my son and myself have done so far before I tell you the problem.

Cam and crank sensors
VVT Solenoide
Fuel pump
Fuel filter
Air Maf
Eng temp
Air temp
Throttle body

The car cuts out when you blip the throttle, cant start with re ignition but can when you turn key fully back and start any ideas please would be welcome, and it has been on a full diagnostic (car specific with a snap on unit which was clear) Grrrrrr :slight_smile: ty Stuart and Ollie

2

Possibly water ingress in the ecu. Take the ecu out take the cover off and look for corrosion. To dry it out use a hair dryer on a low setting so as not to heat it too much. Use electric contact cleaner on the loom connectors before re installing . Hope this helps.

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3

Hi
Not had a 2.5 MX but the symptoms sounds like a fuel pressure regulator.
Have you got a way of checking pressure on your fuel rail?

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4

Any fault OBD2 fault codes ?

5

Have you checked the base idle?

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6

Done that still problem! Ahhhhhh! lol

7

Good call new one fitted still the same Ahhhhhh! lol

8

All about the base? what do you mean please?

9

Maybe you could check the tps?

10

Hi all

We have now replaced ECU and TPS still got the same problem! any other ideas, was tempted to do the coil pack and alternator but all checked out ok?

Many thanks

Stu and Ol

11

Google MX-5 base idle and you’ll find all sorts of possibilities and help.

Did you replace your MAF with one marked F1SE, seems to be an important detail.