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Old 19-06-2017   #16
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Re: Petrol Injector question

Quote Originally Posted by g8rpi View Post
The injector difference sounds very suspicious. Did you note the part numbers? Was the fault there before the last service? If not I'd be talking to the garage who changed the injector.
Robert G8RPI.
Didn't look for part numbers.

Before the injector change the car was running well. I had noticed some petrol smells so when the mechanic said an injector was leaking I was not suprised.
The recent problem did not start imediately after the injector change which was last November. The other injectors are the originals; I've had the car from new.
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Old 20-06-2017   #17
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Re: Petrol Injector question

Quote Originally Posted by jackwhoo View Post
worthwhile check is the HT leads and coils ...because symptoms are classic weak spark failing under load.
While waiting for the lead set to use with MultiECUscan:
The symptoms are, engine not wanting to run on start up especially when hot. Then when the engine starts it's only running on three cylinders. This clears after about a minute. Smells of unburnt fuel! The car then runs as well as ever; top speed is good; acceleration is good. When climbing steep hills the engine sometimes shows signs of misfiring, (I guess that might indicate breaking down under load). Do you still think weak spark could be the issue?
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Old 20-06-2017   #18
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Re: Petrol Injector question

If you want to look at something before MES you could pull the spark plug , keep note of which plug is from which cylinder , compare the looks of the firing ends for differences (particularly the one with odd injector)
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Old 20-06-2017   #19
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Re: Petrol Injector question

Injectors should all be the same, so worth querying with the fitting garage. Possibly an aftermarket one, listed for multiple engines, but there's a difference the manufacturer has not caught up with.

Plugs hopefully will give a clue as to which cylinder is misfiring.

Once you have MES, plug it in and see the readings before starting the engine, then as started, watch them and see if they change as expected. Duff temp senders or other sensors can give acceptable, but wrong, readings, so ECU does not realise they are wrong.
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Old 20-06-2017   #20
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Re: Petrol Injector question

Something new today. Started the car, with the current reluctance. When I started to manoeuvre there was a strange rubbing, squeezing feel as I turned the steering wheel. I had to have a look underneath the car to see if something was caught. The sounds cleared when I started to drive. Electric power steering problem maybe? Could this be connected to the misfire problem; I'm imagining a faulty ECU causing mayhem?
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Old 20-06-2017   #21
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Re: Petrol Injector question

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.
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Old 22-06-2017   #22
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Re: Petrol Injector question

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.
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Old 26-06-2017   #23
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Re: Petrol Injector question

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?
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Last edited by Neil Ives; 26-06-2017 at 10:26. Reason: Updates
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Old 27-06-2017   #24
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Re: Petrol Injector question

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?
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Old 29-06-2017   #25
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Re: Petrol Injector question

Quote Originally Posted by Neil Ives View Post
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?
I've found two part numbers for injectors, one for models 04-09.
https://www.shop4parts.co.uk/?name=s...2778&sku=41093

And another for models 09-12.
https://www.shop4parts.co.uk/?name=s...429&sku=185275

I wonder if your mechanic knew this?
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Old 09-07-2017   #26
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Re: Petrol Injector question

Quote Originally Posted by Neil Ives View Post
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?
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.
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Old 09-07-2017   #27
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Re: Petrol Injector question

Quote Originally Posted by Neil Ives View Post
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.
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.
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Last edited by jrkitching; 09-07-2017 at 18:28.
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Old 10-07-2017   #28
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Re: Petrol Injector question

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!
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Old 11-07-2017   #29
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Re: Petrol Injector question

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.
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Old 4 Weeks Ago   #30
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Re: Petrol Injector question

Quote Originally Posted by Neil Ives View Post
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.
That should have said 2011!
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