UK-POLOS.NET - THE VW Polo Forum

Hi, I have a problem with my high milage Polo I can't fathom. I have very poor starting, hot or cold. It's had a new EGR valve and a fuel filter. It's regularly serviced by me and faults fixed as they occur. It will crank for ages when it, finally, fires it runs lumpy, feels like it's running on 2 cylinders. this smooths as it gets warm but "misfires" continue intermittently. At revs over 1200, it smooths out a bit with no real issues under load, I have no obvious loss of power.

I suspect a failing injector. I've had no MIL light and the only faults I've logged are crank speed sensor, I believe from long cranking without firing. Cleared it did not return. I've just bought VCDS, officially, with a license and everything! Believing it's an injector I've logged blocks 13, 18 and 23. a print is attached.

Anybody got any good ideas, I'm stumped.

Having similar issue, although mine starts fine, it just runs lumpy.

I'm getting the same output (2.99) on cylinder 2, which it my suspected faulty injector. I just wanted to know if people have changed the wiring loom and its solved the issue.

I suspect it will need a new injector.

Mine didn't have the EML light on, its only come on today after a few days of intermittently running rough.

I cant really see if anyone else has just changed the loom and its solved their issue. The output reading on injector 2 suggests its faulty so I think I'm going to bite the bullet and replace the injector.

Just for reference here are the bits I'm going to order and cost:

1) Injector - currently on offer for£75.89
https://www.ebay.co.uk/itm/176603824119

2) Injector wiring loom, would prefer original or a reputable brand but the cost difference suggests other wise - £15.86
https://www.ebay.co.uk/itm/184588947071

3) Rocker cover gasket - £14.10
https://www.ebay.co.uk/itm/315796447945