GTSpec
Member
Hi all,
I’m after some advice from the FSI experts. Back in August I bought a 96,000 mile FSI for recently retired father. The car was in great cosmetic condition but mechanically it had a few issues however the service history was extensive.
I noticed the car had a lumpy idle when I drove it back home which I put down to dirty injectors and possibly the wrong fuel being used recently.
I wanted to get the engine as reliable as possible for him so as a preventative measure I got the injectors professionally cleaned and serviced on an Asnu machine, cleaned the intake valves and lower intake manifold (flaps work perfectly), replaced the oil separator, all for coils for Bosch items and an engine service using NGK 4 electrode plugs. I also carried out a compression check and all cylinders showed 11 to 12 bar.
The engine has always had a lumpy idle which was down to random misfires on cylinder 2. This has got progressively worse and now it misfires constantly. I have checked for spark which is there and I have run a new earth strap.
Earlier I checked the in-take lift pump and it delivered 760ml of fuel in 15 seconds at 12.55v. I got 2.5 bar of pressure at the low pressure side of the fuel rail using a cheap eBay fuel pressure gauge. The injectors are all reading 1.6/1.7 ohms back to the ECU connectors. I rechecked the cylinder compression readings and they haven’t changed since August.
VCDS is giving codes 16686 and 16684.
One thing I would say is that it runs a lot rougher when the engine warms up.
Any suggestions based on experience? It is driving me mad now.
Cheers.
I’m after some advice from the FSI experts. Back in August I bought a 96,000 mile FSI for recently retired father. The car was in great cosmetic condition but mechanically it had a few issues however the service history was extensive.
I noticed the car had a lumpy idle when I drove it back home which I put down to dirty injectors and possibly the wrong fuel being used recently.
I wanted to get the engine as reliable as possible for him so as a preventative measure I got the injectors professionally cleaned and serviced on an Asnu machine, cleaned the intake valves and lower intake manifold (flaps work perfectly), replaced the oil separator, all for coils for Bosch items and an engine service using NGK 4 electrode plugs. I also carried out a compression check and all cylinders showed 11 to 12 bar.
The engine has always had a lumpy idle which was down to random misfires on cylinder 2. This has got progressively worse and now it misfires constantly. I have checked for spark which is there and I have run a new earth strap.
Earlier I checked the in-take lift pump and it delivered 760ml of fuel in 15 seconds at 12.55v. I got 2.5 bar of pressure at the low pressure side of the fuel rail using a cheap eBay fuel pressure gauge. The injectors are all reading 1.6/1.7 ohms back to the ECU connectors. I rechecked the cylinder compression readings and they haven’t changed since August.
VCDS is giving codes 16686 and 16684.
One thing I would say is that it runs a lot rougher when the engine warms up.
Any suggestions based on experience? It is driving me mad now.
Cheers.