Hi all knowledge people, especially deckshair and yellowstilo.
I'm having this problem for some time now, car cuts out in stop and go situations
sporadicaly when it feel like
And this is most happening while engine is warm and on working temperature.

It happends like this stoping and when clutch in rpm drops under normal 700 to
something like 500 rpm and sometimes it return to 700 and sometimes it just cuts off completely. I can instantly restart car and continue driving.

So far i did following:
1. Rechecked and redone timing belt (so finally got intake pressure on idle in his normal state something about 330 mb on 700 rpm which is normal as i read on this forum) car is little quieter but problem remains
2. Changed crank sensor but problem remains
3. Cleaned whole trottle body several times also done relearn procedures (manual ones ignition on 60 sec ignition off 60 sec ... also done relearn over diagnostic software FES ) problem remains
4. Inspected wires all i could, cleaned D4, cleaned fuse box under hood (it was not dirty at all) problem remains
5. MAP sensor to ECU I seen something strange with its wiring concretly map pin for signal of pressure to ecu pin 31 i havent found circuit there BUT fes is giving normal reading of pressure changing while hitting acc pedal. So my question for this is
Is it possible that diagrams are wrong and MAP pin is not going to pin 31 on ECU B connector?

6. Please give us some advices what to do i'm loosing my hair with this car. I'm afraid to drive my family in it.

Would love to know the cause of this mine does this also, very annoying when at a roundabout. Funny how every time I take it to the garage it doesn't do it for them

Lots of info available on here with a search, most commonly seems to be a failing engine ECU which will either need replacing with a new one or specialist repair.

is it fine when it is cold? I know a 1.6 petrol wont stay cold for long, but if it is ok when cold, then I would also consider the CKP sensor as they are quite cheap, but have a garage confirm this if you can, or do it yourself to keep the costs down.

Clivvy said:

is it fine when it is cold? I know a 1.6 petrol wont stay cold for long, but if it is ok when cold, then I would also consider the CKP sensor as they are quite cheap, but have a garage confirm this if you can, or do it yourself to keep the costs down.

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Thanks for sugestion but I allready changed Crankshaft position sensor and nothing changed. Problem remains. Yes it was cheap even here in Serbia about 11 Euros.

Did you set the ckp sensor.

bri1232 said:

Did you set the ckp sensor.

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Yes, I set it as close as possible.
But old sensor also was good.
That was just shooting in dark changing it.
But was cheap try

If there is someone who experienced similiar problem on Stilo please
give some advice what to do.

And more info.
ECU is alternativily mounted to battery box. So its not overheating with engine etc...

Belgrade79 said:

If there is someone who experienced similiar problem on Stilo please
give some advice what to do.

And more info.
ECU is alternativily mounted to battery box. So its not overheating with engine etc...

Click to expand...

https://www.fiatforum.com/search.php

Lots of information about it. A chap called James managed to fix it about 18 months ago with a replacement ECU iirc.

Most Easterly Pandas said:

https://www.fiatforum.com/search.php

Lots of information about it. A chap called James managed to fix it about 18 months ago with a replacement ECU iirc.

Click to expand...

With all do respect, ECU is last thing ill will try since its werry expensive here in Serbia 200-250 Euros. But considering our sallaries 300-350 euros a month
its too much money. And there is no single warranty it is ECU.

Also its not my primary suspect because i never had those scary errors on display like ASR loose connection, Car security etc

So please give some constructive advices or from someones experince other then just ECU replacing. I think there is more suspicious parts in thins car then just engine ecu.

It sounds like Ecu problem can you get it tested as they are prone to failure ( heat issues poor Ecu location ) I had similar problems only thing that sorted this was new Ecu.

Belgrade79 said:

With all do respect, ECU is last thing ill will try since its werry expensive here in Serbia 200-250 Euros. But considering our sallaries 300-350 euros a month
its too much money. And there is no single warranty it is ECU.

Also its not my primary suspect because i never had those scary errors on display like ASR loose connection, Car security etc

So please give some constructive advices or from someones experince other then just ECU replacing. I think there is more suspicious parts in thins car then just engine ecu.

Click to expand...

Thats fair enough, however you can waste lots of money on small possibilities, but then it'll cost more in the long run if it turns out to be the ECU. As mentioned above should be able to get it tested for less.

no disrespect, but the ECU advice is constructive and well worth factoring into your diagnostics now, though I appreciate the possible costs are very off putting, the ECU failure is VERY common on the 1.6 petrol Stilo.


as for some more tips, I would get checking the HT leads and spark plugs. ALso check the accelerator pedal and sensors/plugs/wiring and clean (probably OK, as FES would have picked up the position if it was wrong), still, if you don't want to get the ECU checked, id check the above.


also, consider your fuel filter, fuel pipes and make sure there are no holes in them, again they are probably fine but air in the pipes can cause loss of power and so on plus its easy to check you just need a torch.

you might try to change the T9 relay in the engine bay with an similar relay from another location but my guess would also be a faulty ecu....
Unfortunately this is rather common on the Stilo 1.6 , the stupid location on the hot vibrating engine is the cause of these faults.
You will need a revirginised ecu, when you can't find one you can send me a PM.

Clivvy said:

no disrespect, but the ECU advice is constructive and well worth factoring into your diagnostics now, though I appreciate the possible costs are very off putting, the ECU failure is VERY common on the 1.6 petrol Stilo.


as for some more tips, I would get checking the HT leads and spark plugs. ALso check the accelerator pedal and sensors/plugs/wiring and clean (probably OK, as FES would have picked up the position if it was wrong), still, if you don't want to get the ECU checked, id check the above.


also, consider your fuel filter, fuel pipes and make sure there are no holes in them, again they are probably fine but air in the pipes can cause loss of power and so on plus its easy to check you just need a torch.

Click to expand...

Hi Clivvy,
Spark plugs are new ones, but i tried old ones also. Problem remains
HT Coils didnt checked I was thinking about investing in one and change it from 1 to 4 cilinder(drive a while in all four cilinders with that new one)
inform all when do this Coil swaping
Acc pedal checked, manual method pushing slowly and looking at RPM it raise contiuonusly so I think its ok.

Fuel filter i dont have as my observation. Em I wrong about this? Where is it if I'm wrong?
For fuel pipes i dont know because I have LPG system and problem is occuring on both gasoline and LPG.

Anyone have idea why i didnt find circuit of MAP sensor signal wire to ECU pin 31? I have wrong diagram maybe?

hey,

may be it is not that relevant, however where in UK ECU can be tested?

Thanks

ok, heres a thought - check the fuel cut off switch.

Clivvy said:

ok, heres a thought - check the fuel cut off switch.

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Well its happening both on petrol and LPG so I think its not conected over fuel cut off switch? If it is how do I check it?

Thanks

Update:
In one garage they sugested that coil charge time
is wrong
its something about 1900-1968ms
but it should be 1550ms

any ideas?

Thanks

My one coil charge time is 1.570 is it a problem? Others are 1.550.