An unusual description. get your head under the dash and take a good look at the steering column and pedals. Possible that there might be some wiring fouling perhaps? Look for any conflicts.

No more strange noises. The day was very hot; I'd parked in a multi-story car park. The floor was painted. I can only think the tyres were squeaking on the surface as I manoeuvred.

Setting up MultiECUScan. Software and interface driver installed.
USB serial port test passes ok. Interface lights flash when F11 'Scan' is pressed but when F10 'Connect' is pressed I get a 'Check your cable and serial port settings' Any ideas please?

Update: Scan vehicle works and shows what systems are on the vehicle but connect does not!

Update 2: Scan DTC is not active. What does that mean?
Neil

Now that the UK weather has cooled down the car is running very well. Wondering about fuel boil off or some other fuel related cause. Any thoughts?

Neil Ives said:

At the last service the mechanic changed one of the injectors because he said it was leaking petrol. When I cleaned them last week I noticed that the new one has only one nozzle, the others have six; is that likely to be significant?

Click to expand...

I've found two part numbers for injectors, one for models 04-09.
https://www.shop4parts.co.uk/?name=store&op=Details&ProdID=2778&sku=41093

And another for models 09-12.
https://www.shop4parts.co.uk/?name=store&op=Details&ProdID=9429&sku=185275

I wonder if your mechanic knew this?

Neil Ives said:

Now that the UK weather has cooled down the car is running very well. Wondering about fuel boil off or some other fuel related cause. Any thoughts?

Click to expand...

Hot weather - car is being a pig! Had to put the hazards on today while at a junction while the car farted and stuttered and did not have enough power to move away! After about a minute off she went like shyte off a shovel!
I have not had another chance to try the diagnostic equipment that I bought. Do you have any suggestions as to why I was unable to do anything with it? Software appears to be reading the cars set-up but refuses to 'Connect'.

Why can I not find an answer here to this question: "Why does my Panda Classic '61 reg misfire, only when it's very hot?" Surely other folks must have had the same fault. :worship:

Neil Ives said:

Why can I not find an answer here to this question: "Why does my Panda Classic '61 reg misfire, only when it's very hot?" Surely other folks must have had the same fault. :worship:

Click to expand...

Actually I can't think of anyone else who's had this problem specifically related to temperature.

My first thought would be vapour lock somewhere in the fuel system. Refineries change the volatility of the blend to suit seasons and markets; one easy thing you can try is to change the brand of fuel you buy. Some have said that premium fuels may be more stable in this regard.

One tool that might be useful when troubleshooting this problem is a bag of ice!

Also don't overfill the tank; modern fuel systems require a vapour space to operate properly. The handbook contains a warning not to refuel beyond the point at which the pump's auto shutoff operates and specifically prohibits dribbling fuel in to brim the tank.

Ok, maybe I can try this another way:
What symptoms would I have if the coil pack is faulty?
What about the various sensors?

When I'm at home I always fill up at Sainsburys. Since the misfire started I've been using their premium petrol. Could that be an issue; I have a vague recollection from years ago of certain supermarket fuels causing running problems?

Symptoms seem to me like might be temporary fuel starvation. Is there a filter or something in the throttle assembly that may cause trouble, (I do understand that this car does not have a carburettor)?

I recently took the plugs out soon after a misfring session. One plug was a little darker than the others but really nothing much. I swapped the injectors around to see if the odd injector, (only one jet, others have multiple jets) fitted by my mechanic was causing trouble. I'd go back to talk to the mechanic but he's off work sick at the moment.

My wife is currently afraid to use the car at the moment in case it lets her down!

Cool today with light rain: No trouble with the car! Perhaps I'll get rid of the car during the winter so next summer it's someone elses problem!

I wrote to the auther of MultiECUScan about my inability to 'Connect' to the car. He's suggested that as my car was first registered in 2001 I should select Panda '03. I can't recall which model I selected but when the rain stops I'll have another go.

By the way, I never get any warning lights when the little begger is playing up.

Neil Ives said:

Cool today with light rain: No trouble with the car! I wrote to the auther of MultiECUScan about my inability to 'Connect' to the car. He's suggested that as my car was first registered in 2001.

Click to expand...

That should have said 2011!

Just in case anyone want's to know I've sorted my Panda problem. I bought a used petrol injector of the correct type, (orange colour band, multi-jet ) and now all seems hunky dory.

I will be having a quiet word with my tame mechanic! Although he changed one injector last November and fitted the wrong type, (colour code blue, single jet) the engine only played up when the weather got hot.

In my mind :chin: I imagine the engine management system detecting an incorrect mixture and then affecting all of the injectors.

Neil Ives said:

Just in case anyone want's to know I've sorted my Panda problem. I bought a used petrol injector of the correct type, (orange colour band, multi-jet ) and now all seems hunky dory.

I will be having a quiet word with my tame mechanic! Although he changed one injector last November and fitted the wrong type, (colour code blue, single jet) the engine only played up when the weather got hot.

In my mind :chin: I imagine the engine management system detecting an incorrect mixture and then affecting all of the injectors.

Click to expand...

Thanks for update.
Well done fixing problem . Sensible course of action as you had an odd one.
Understand confusion that didn't cause fault straight away.
Hope your mechanic is well again and back at work.

If the new injector was smaller the O2 sensor would see excess oxygen in the exhaust gas. It would then over feed the system causing he other three to run slightly rich and the one with small injector to run a bit less weak. Hot weather would expose the rich mixture.

You should have seen it on your fuel consumption.