mid rev range

this is doing my head in now i have changed the HT lead, plugs and fuel filter but still the same :-(

at low revs and high rev the car is fine as soon as it gets to mid rev's it will not pull at all

any ideas will really help as wife loves the car but will not drive it till i have fixed it

thank's Pete

Could may be the lambda sensor on its way out?

does it do it from cold if it does this rules out lambda cos it is open loop for quite some time until the car is warm

short of that it could be any sensor on the engine really

could be a problem with the throttle potentiometer also

could go to local garage and try different rmp's on an emissions tester and see if it's far away from were it should be

no it only when it warm's up

Pete

well go buy a new lambda sensor then

is it best to go back to fiat's or would an after market one be fine (ie from Halfords, motorworld etc)

Thank's
Pete

I would think your better going to Fiat than using an aftermarket one, http://www.shop4parts.co.uk/ they do the lambdas for under £60, also remember to reset your ecu once you replace the lambda..

how is that done ???

Pete

disconnect battery for a while, over night if you can to make sure, but few hours should be ok.

Thank's all

i will let you know how it gose

Pete

after you replace a lambda sensor and the engine has gone thou a warm up cycle it should automatically turn the light off but the fault will still remain in the ecu as an intermittent one only fiat examiner or some other code readers can clear this but it doesn't really matter what you care about is that the light is off

yea more likely a lambda as everyone says if only when warm ie lambda closed loop

cheap-o lambda sensors are a waste of time I haven't seen any last more than a couple of years also with the original part you don't need to mess with wiring it to the original wires you just get new one and plug in it's under the cover at the back of the engine