Heya,
This is not exacly a fiat.... Or it is, but its branded as Ford KA, and i think from here i can found more expertise then in the ford section
So, its my wifes car, 2011, 1.2L 60 000km driven. Regulary serviced at the stealership, and 0 previous issues whit the car.
Last week, the winter decided to come over, and the temperature dropped to nice and comfy -27c. On the morging i got call from my wife that when she got to work, the car had realy shaky-hars-wobly and uneven idle. After a while of that uneven idle, that car stalls. When trying to restart it, it will not start unless you give it some gas while cranking.
Went to drop my car to her, and picked her car for inspection.
When the engine is cold, it runs just fine, no issues there. Then i hitted the highway, engine warmed up, got out of the highway, and the idle was all wrong. Also, what i noticed that there was engine knock in present. Sound bit like a bad tappets, but it goes away as soon as you ease on the throtle, and comes back as soon as you push the throttle.
Checked the fault codes, and there were non present.
I changed the sparkplugs: The tip of the plugs were looking ok, but the rest of the plugs were nearly snow white. (lean mix?) After changin the sparkplugs, the idlle was still the same, the knocking was still there, but it did not stall any more.
At this point, i pulled the plug from the first lambda (in order to get the check engine light on, and force the PCM to rich fail-safe-map)... As soon as i pulled the lambda, the idle was perfect and the knocking was gone.
Ok, so at this point i was like "ok, the lambda is broken".
I used the car for a day like this, and then the idle and the knocking came back.
At this point, i reconnected the lambda, and connected the IDS software and took it for a spin. From the livedata, everything seems to be just fine.
when coasting, the first lambda is constantly hopping between rich-lean-rich-lean-rich-lean, accelerating it stays rich, and engine braking it goes to lean.
The second lambda follows, but much "calmer" pace.
I assume that the engine knock is from pre-detonation caused by to lean mix, but now im kinda lost, since everything seems to work, but does not.
Thanks
Carl
This is not exacly a fiat.... Or it is, but its branded as Ford KA, and i think from here i can found more expertise then in the ford section
So, its my wifes car, 2011, 1.2L 60 000km driven. Regulary serviced at the stealership, and 0 previous issues whit the car.
Last week, the winter decided to come over, and the temperature dropped to nice and comfy -27c. On the morging i got call from my wife that when she got to work, the car had realy shaky-hars-wobly and uneven idle. After a while of that uneven idle, that car stalls. When trying to restart it, it will not start unless you give it some gas while cranking.
Went to drop my car to her, and picked her car for inspection.
When the engine is cold, it runs just fine, no issues there. Then i hitted the highway, engine warmed up, got out of the highway, and the idle was all wrong. Also, what i noticed that there was engine knock in present. Sound bit like a bad tappets, but it goes away as soon as you ease on the throtle, and comes back as soon as you push the throttle.
Checked the fault codes, and there were non present.
I changed the sparkplugs: The tip of the plugs were looking ok, but the rest of the plugs were nearly snow white. (lean mix?) After changin the sparkplugs, the idlle was still the same, the knocking was still there, but it did not stall any more.
At this point, i pulled the plug from the first lambda (in order to get the check engine light on, and force the PCM to rich fail-safe-map)... As soon as i pulled the lambda, the idle was perfect and the knocking was gone.
Ok, so at this point i was like "ok, the lambda is broken".
I used the car for a day like this, and then the idle and the knocking came back.
At this point, i reconnected the lambda, and connected the IDS software and took it for a spin. From the livedata, everything seems to be just fine.
when coasting, the first lambda is constantly hopping between rich-lean-rich-lean-rich-lean, accelerating it stays rich, and engine braking it goes to lean.
The second lambda follows, but much "calmer" pace.
I assume that the engine knock is from pre-detonation caused by to lean mix, but now im kinda lost, since everything seems to work, but does not.
Thanks
Carl
