Lumpy Idle and Sluggish to Rev 1.8 Freelander

[Emeye]

Well I finally managed to get my freelander to a garage to replace the fuel filter along with some other jobs, but unfortunately whilst there have been some improvements the car is not 100%

It now starts without problem, but the idle is lumpy and the throttle response is sluggish, especially so from cold - when you press the throttle there is an initial delay before the revs shoot up and it always feels underpowered. I feel I have to rev it much harder than should be necessary to make reasonable progress!

Everyone seems stumped - coil, dizzy, rotor arms, leads, plugs, injectors and inlet manifold have all been changed as has the coolant temp sensor.

I have read that the aftermarket coolant temp sensors can be dodgy, but I'm reluctant to throw more money at the problem, especially to replace a new item!

Could I be sucking in air somewhere? Could it be the plastic throttle body?

Any suggestions?

Cheers.

[GKP]

I'd be looking at the Throttle Position Sensor (TPS) with a suspicious eye.

[Emeye]

GKP said:

I'd be looking at the Throttle Position Sensor (TPS) with a suspicious eye.

Well I have reset it using the std procedure. When I first got it last year I had a problem where the revs sometimes shot up, and the reset procedure cured it.