My husband drives a basic Panda 57 plate. It has been randomly juddering now for about 3 months. It does it when sitting idle and when travelling. At first we thought it was the cold weather but it has got slightly worse. It has been in the fiat dealers 3 times to be checked. The first two times they said they could find nothing wrong and the third time they have said it is the 'engine wiring harness' which will cost £400 to get fixed as it isn't covered under waranty. We absolutely do not trust this dealer though so was wondering if anyone has experienced this juddering problem and if so how did they rectify it? Thanks
Do you mean when the engine is just sat running that it slows down and speeds up quite quickly over and over?.. And you get the same sort of spluttering when driving.. where its feels like its not reving up the same as it should (lumpy)..
I'm not a mechanic but the last thing I would think would affect how the engine is running would be the wiring harness...
My guess is someone has tried to run a test with the computer gear and the readings aren't as they expect them to be so either it or them suggest its the harness.
(I had a home tester for my old car and it used to say things like throttle swtich faulty or wiring just because I didn't bother doing the throttle test when going through it)
Bad idling and hesitation when reving can be many many things - spark plugs need changing, blocked fuel lines/filter, blocked air filter, leaking manifold, and with modern cars could be any of the sensors playing up (often the one on the exhaust), could just be the HT wiring...
Your not the first person I've heard lately that has been told its the wiring harness.. ! My daughter drives a Clio and was told hers was the fault, took it in to the garage, they "did the work" and the car drove out of the gararge ok for about 1 mile... broke down and she then took it to another garage who found that they had tried to glue the fuel injector together (which was the real original fault) and it obviously didn't work for long !
Steve