2.0 TSI CCZA Fuel Injector Stuck Open. Advice Please.
Discussion
Chaps
I dropped a cylinder on the M4 yesterday, and managed to limp home. There was no smoke out the back until I got off the motorway and sat in traffic for a few mins.
Diagnostics said Cylinder 4 missfire, so I pulled the plug. It was soaking wet in there so I left it overnight to evaporate.
Put a compression tester in there tonight, and got 180PSI as the first reading. Took 2 more, and it jumped up 20PSI with each attempt to read it.
Pulled the compression tester and the cylinder was flooding with petrol, you could hear it pouring in. The injector appears to be stuck wide open.
The battery is now flat (separate issue, but caused from all the cranking yesterday/today) so I can't continue with my compression tests, but the first test of Cylinder 3 was 150PSI, but didn't get enough rotations to be sure, and hopefully it is more like 160PSI.
Anyway, once the fuel has evaporated again and I've done a compression test and I'm happy that all 4 cylinders are OK valve wise etc (will disconnect the fuel pump fuse for the next run)....I want to see about repairing this mess.
An injector is £110, which isn't too bad. Taking the inlet off doesn't look too tricky.
Apparently pulling the fuel rail could result in injectors coming out of the head and needing resealing - is this a big risk/big job? I'd need a resealing tool on hand if it happened, but would rather not buy one if I don't need it.
Could anything else be at play here? I.e. a reason for the injector to fail? Could it be a victim of something else? Interstingly on the 2 longest journeys I have done on this car, I have seen an ECU code about it running too rich. I do wonder if this has been occasionally sticking open at times and it's only just become terminal.
I will drop the oil, as there is so much petrol in the cylinder I would expect some of it to have watered the oil down by now.
Is there a resource/forum with helpful people lying around waiting to help with this engine?
Cheers
C
I dropped a cylinder on the M4 yesterday, and managed to limp home. There was no smoke out the back until I got off the motorway and sat in traffic for a few mins.
Diagnostics said Cylinder 4 missfire, so I pulled the plug. It was soaking wet in there so I left it overnight to evaporate.
Put a compression tester in there tonight, and got 180PSI as the first reading. Took 2 more, and it jumped up 20PSI with each attempt to read it.
Pulled the compression tester and the cylinder was flooding with petrol, you could hear it pouring in. The injector appears to be stuck wide open.
The battery is now flat (separate issue, but caused from all the cranking yesterday/today) so I can't continue with my compression tests, but the first test of Cylinder 3 was 150PSI, but didn't get enough rotations to be sure, and hopefully it is more like 160PSI.
Anyway, once the fuel has evaporated again and I've done a compression test and I'm happy that all 4 cylinders are OK valve wise etc (will disconnect the fuel pump fuse for the next run)....I want to see about repairing this mess.
An injector is £110, which isn't too bad. Taking the inlet off doesn't look too tricky.
Apparently pulling the fuel rail could result in injectors coming out of the head and needing resealing - is this a big risk/big job? I'd need a resealing tool on hand if it happened, but would rather not buy one if I don't need it.
Could anything else be at play here? I.e. a reason for the injector to fail? Could it be a victim of something else? Interstingly on the 2 longest journeys I have done on this car, I have seen an ECU code about it running too rich. I do wonder if this has been occasionally sticking open at times and it's only just become terminal.
I will drop the oil, as there is so much petrol in the cylinder I would expect some of it to have watered the oil down by now.
Is there a resource/forum with helpful people lying around waiting to help with this engine?
Cheers
C
Gassing Station | Audi, Seat, Skoda & VW | Top of Page | What's New | My Stuff