Technical Cinquecento Sporting hesitant at low revs

[blu73]

i've had parts from all them brands before, would avoid the mapco one thats got plastic housing - bosch, mann and mahle are all good quality products

And to not mess it up, look on the filter and it will have a arrow to indicate direction of flow

 

[frodovic]

i've had parts from all them brands before, would avoid the mapco one thats got plastic housing - bosch, mann and mahle are all good quality products

And to not mess it up, look on the filter and it will have a arrow to indicate direction of flow

Perfect

Thanks a lot

 

[frodovic]

Just an update on this one

- New radiator, heater matrix, tubes and coolant (the good stuff) in. No over heating now YEY

- New MAP, Idle Control Valve and Temperature Sensor fitted. The car idles a lot better now, specially when cold

- Found a problem with one of the spark plug leads (corrected with a used one, ordered all 4 new).

The engine is now working a lot better, with a "rounder" noise, revving quickly and making around 7 liters of gas to 100 kms.

There are still 2 problems tough, I still have the lambda sensor error on the ECU and now I cant even clear ir (it shows in ACTIVE state). While looking into this problem I found some wiring problems (copper can be seen it the lambda sensor plug and one of the coils at least) so in the next few days it will be in an electrician.

In the last 500 kms or so it only failed 1 time after a long stretch of 100 kms ...

Keep you fingers crossed

 

[frodovic]

Hello guys,

My mechanic and I were playing around with IAW Scan this afternoon and found something suspicious. The air temp is showing at 50º C which he told me migth be too high.

Do you guys know the normal air temperature for a hot engine on this car ??

Thanks in advance

 

[cc1]

NTC Thermistors don't change their characteristics, they go open circuit at temperature changes if faulty.
50 DEG C sounds about right for a hot engine at idle.
To test its range, you would need a multi-meter, an ice cube and a hair drier.

 

[frodovic]

Ok guys. Lets not leave this opened.

We finally found the issue.

After purchasing an USB extension and doing some testing with a co-pilot investigating the values with the car actually running we came to a conclusion and fixed the problem: man, that ECU scan is a spectacular piece of software !!!!

After some time running at a constant speed the misfire/power loss ocurred and the lambda sensor correction went to the minimum (0,66) indicating that the mixture was too rich. So if there was gas, we were missing spark ... So we started with some new leads which reduced the problem a lot but after very long journeys it still misfired. So I bougth new coils and this problem is fixed. Went for about 5000 kms since I have the new coils without the car failing on me.

Now Im struggling with another electrical problems with the car: when I turn the ligths on the dashboard ligth and the ligths in back dont turn on immediately, only after about 5 minutes with the car running they come to life (go figure), the radio ilumination after some time goes off and If I try to climb a steep ramp in first gear I get the ECU ligth on and a "Short to Vcc on Coil 2" error on the log. We already verified the masses and took the cable that connects the alternator to the coils out and it seems to be fine. Since I hear a loud whistle past the 4000 rpms we think the bearing from the alternator is gone so Im trying to find one (even used) to test if the problem is the alternator itself ...

Thanks a lot for you help guys. Your input is appreciated on the new problems too ...