Technical Erratic tickover7

[dunc391]

I have a 2010 Panda with 16000 miles on the clock. It was owned by an old lady who used it on e a week to go shopping. The car runs well. The problemis that with the aircon on its lowest setting the car cuts out. The aircon works as it should with no other problems. Its just when its on the LO setting. Do you think it could be the ICV that needs cleaning/ replacing? Thank you and sorry for the long post!

 

[koalar]

If you, at idle

But the blowers on full. Rear heated window. And main beam on

Does the car stall

Does it make any difference if the engine is hot or cold


Cable throttle body or flyby wire

 

[dunc391]

Thanks for your help. Blowers, main beam, heated rear window on the car dosent stall. No difference hot or cold. Its cable throttle. It only happens when the ac is set to lo.

 

[koalar]

ICV would appear to working properly

If you have a scan tool

You can look at expected Vs actual rpm

You can look at the amount of steps on the ICV

You can look at the A/C Pressure Switch data

I suspect the ECU is missing the 200 rpm bump up under heavy AC loads, to stop it bogging down or stalling, which was a software glitch fixed with an update on some pandas, unfortunately I have no way of checking service bulletins on older fiats

 

[dunc391]

ICV would appear to working properly

If you have a scan tool

You can look at expected Vs actual rpm

You can look at the amount of steps on the ICV

You can look at the A/C Pressure Switch data

I suspect the ECU is missing the 200 rpm bump up under heavy AC loads, to stop it bogging down or stalling, which was a software glitch fixed with an update on some pandas, unfortunately I have no way of checking service bulletins on older fiats

Thank you. I will get the codes read by a garage this week and will update. The EML does not come on when the stall occurs.

 

[koalar]

You can get to read the live data yourself for a few quid if you have a smart phone


It not that difficult, and the OBD2 reader can be used for other vehicles

 

[dunc391]

Thanks for that. Im looking at the Elm 327 Pro on Amazon.

 

[koalar]

Yep there's a lot elm327 about

Some work
Some don't

V1.5 and PIC18F25K80 seem the most reliable

I don't like recommending things I haven't tried myself

This seems like a good bet

The first review says it works with multiecuscan which can be a bit picky

DollaTek Car OBD II Diagnostic Tool Auto Scanner Code Reader WiFi bluetooth V1.5 : Amazon.co.uk: Automotive

Buy DollaTek Car OBD II Diagnostic Tool Auto Scanner Code Reader WiFi bluetooth V1.5 at Amazon UK. Free delivery on eligible orders.

www.amazon.co.uk

Which ever you get, the an app on Android that tests them

Fingers crossed

 

[dunc391]

Ive looked at videos of code readers and read all your excellent technical posts on the subject, but the technology goes way over my head! Iwill try to get a scan done at a garage. Thanks for all your help, much apreciated.

 

[koalar]

The one in the link above should do you it's £12 free delivery


And should be future proof as it works with iPhone as well

The description says it V1.5 and PIC18F25K80 so should work reliably

I am not vouch for it as it not the one I use, but everything seems good

The C reader 30001 is know to work
It's plug and play no software to set up and reads live data for under £20

Pretty sure this is just an update

https://ebay.us/m/nHZUioP

Cheap handheld is limited to only read engine, but are plug and play

Elm327 plus free car scanner software is more versatile, there's a couple of initial setup steps

If your starting a repair your own vehicle journey I start with the elm327, then if in the future you need to read one of the other models the only extra expense would possibly an adaptor canle

Cheap Scanners Known to Work | FIAT Panda (Mk3)

I see a few people asking about engine check light I thread with readers known to work might help others I see someone has had success with a C reader 30001 Which also does live data 👍 https://www.fiatforum.com/threads/fiat-diesel-garage-in-the-midlands.496210/ and in 2022 can be had for...

www.fiatforum.com

Either are basically free after the first use, not having to pay a garage

 

[dunc391]

Would a scanner show a fault when there is no Eml? Thanks again

 

[koalar]

Would a scanner show a fault when there is no Eml? Thanks again

No

But the live data will tell you if the icv is working properly

And tell you if the ECU expected rpm is moving up when the AC LO is selected normally it looking for 750 it should bump up to 850 or more expected and actual revs are normally slightly different, but pretty close each other

It will tell you how many steps are on the icv

I suspect the ICV is working properly and it's a common software glitch, it would be handy if we knew if it's always done this

You could try lowering and raising the windows when at idle. If the ICV is faulty in normally stalls or very close to

 

[dunc391]

I will definatly get a Code reader in the next few days delivered from Amazon. Thanks for your suggestions.