Need some help.

May 13, 2025
1
0
Afternoon, I really need some help if possible. I've got a 2014 Seat Ibiza 1.4 Toca. I've had about 9 years.

Long and story short I barely used it last year did about 4000 miles and it was sat a bit. Also neglected to service for 2 years. Neglect aside. I now have the following problem.

The car has a rough idle. If I have the air con it sites about 750 - 800 rpm with a slight judder like it's misfiring.

If I don't have the air con it sits about 600 - 650 rpm and the engine runs like a sack of potatoes at idle.

Soon as you are driving and at a speed aside from a wheel bearing whine I am aware off. I pulls along lovely.

If on a cold engine the car will start and sit at about 1000rpm sometimes but soon as you drive it a little or turn the engine off it then has trouble starting and the rough idle remains.

So far I've done the following with a friend who is also a mechanic.

  • Changed the Throttle Body and done alignment.
  • Changed the Injectors
  • Tested the Coil Packs and swapped out each one. Made no difference
  • Had the Cambelt tensioner and pulleys done and the belt has been shown to be in time.
  • Changed the fuel filter.
  • Changed the Spark Plugs
  • Oil Filter and Oil change. Mechanic chose to put 10w60 in as a thicker lubricant. I know the car normally takes 5w40
  • Tried the EVAP Purge Valve seems to be okay.
  • Done a compression test on the cylinders all coming out at about 275
  • Tried a Camshaft Sensor.
  • Had a new battery
  • Ran some Redex through it.
Things that haven't been done or tried yet
  • EGR Valve
  • Fuel Pump
  • Crankshaft Sensor
  • Lambda O2 Sensor
Don't think it's the starter motor or the alternator as the alternator is charging the battery absolutely fine.

I've probably spent upwards now of up to £400 - £500 trying to repair this thing and I am at a loss. We've run an ODB2 through it and that reports no faults. Not had VAG com reader on it yet as I need to take my car into a Seat Dealer and update the owner details to get the engine code for my VIN Number before they will even speak to me. Plus I don't really want to pay their prices.

Just wondering if anyone else has had problems with this model Seat? If there is something I am missing?

Any help would be greatly appreciated.

I have videos.

Many thanks,

Damien
 
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