Random misfire

[Topgeartom]

As of yesterday my ph1 has developed an odd fault.

Theres an intermittant misfire happening, its pretty random but slightly more common on very low throttle inputs. Power is completely cut very sharply for around half a second, then jolts back in again.

Ive changed the leads, coilpack and crank sensor and its still doing it. The plugs were changed under a year ago.

What are the other culprits?

Cheers
Tom

 

[Topgeartom]

Just to add, it has also cut out a few times when stationary, in a similar way as when the power cuts whilst moving, the same thing happens at idle, and the car dies.

 

[Topgeartom]

Would the MAP sensor have anything to do with this?

 

[gothy]

Did you sort this problem , mine is displaying similar symptoms.

 

[DTM]

Mine does the same, still not figured it out, and I've changed everything, including injectors, and no fault codes just a random misfire at low revs but when accelerating.

 

[Topgeartom]

This was a while ago but from memory it was a bad map sensor.

 

[hattie21]

mine did the same for about 2 months after i first bought it, then just randomly sorted itself. However didn't drive it again for about 2 weeks last month and the first few times it started doing this again so not sure whether it sitting idle for any time could have something to do with it as well

 

[Mike@Rentech]

Change plugs again and inspect plug leads for any signs of white on them.
if not it's injectors.