Only getting spring boost

[rynaqui]

You have an ignition miss. Assuming your plugs and coil-to-plug boots are in good shape, it is probably a POS channel is dieing.

Click on the N122/N127 label in this diagram and look for the POS diagnostic link in the POS info post:

http://members.shaw.ca/speedtek/UrS%...ice%20Map.html

Have thought about that, isn't always present. Let's see..my EFI coils are about 2 years old this August, in Malta's climate could be time for replacement? I have a spare set so may have a go, also looking at putting the new NGKs in once I've gapped them, will try that.

As for the boost issue, going to get the intake off anyway and putting new gasket on there and between the throttle body and intake since I need to get the injector seats done. Will also be refreshing a couple of sensors whilst under there.

Would the misfire be so bad that it could cause the car to stall?

[macspring]

My money is on one of the POS channels giving up.

When your inlet manifold is off, replace the white oil pressure switch down lower on the side of the block. Much easier to access with the inlet manifold or the radiator out of the way.

Let us know if the new injector inserts are a good / tight fit in your oem inlet manifold, as new oem plastic inserts weren't on my MTM copy inlet manifold.

Best wishes.

[UrS4boy]

AAN Intake Removal R&R (with injector insert replacement)

As for the boost issue, going to get the intake off anyway and putting new gasket on there and between the throttle body and intake since I need to get the injector seats done.

You don't tell us which EFI coilpacks you are running, the LS2 or the 1.8T style. Either way, they can go bad. You can figure out which one is bad by pulling the injector electrical connectors one by one (and reconnecting them before moving to the next cylinder). The problem coil pack will be the one that least impacts the rough idle when you disconnect the injector electrical connector.

As for injector inserts, etc., you might want to read this:

http://forums.quattroworld.com/s4s6/msgs/266127.phtml

[rynaqui]

You don't tell us which EFI coilpacks you are running, the LS2 or the 1.8T style. Either way, they can go bad. You can figure out which one is bad by pulling the injector electrical connectors one by one (and reconnecting them before moving to the next cylinder). The problem coil pack will be the one that least impacts the rough idle when you disconnect the injector electrical connector.

As for injector inserts, etc., you might want to read this:

http://forums.quattroworld.com/s4s6/msgs/266127.phtml

Thanks Dave, I am running 1.8T coils.

Looks like there's one or two more extra thing I might wanna buy before going ahead with this job such as that T style hose. Good time to replace that too!

Will keep you all updated, everything should be going down next month I hope..

[igor136]

wrong post

[UrS4boy]

Thanks Dave, I am running 1.8T coils.

They do die and your engine will then run like c**p. Easy to diagnose which one via the injector electrical connector disconnect/reconnect procedure.

[newsh]

At the risk of sounding like a broken record, have you tried cleaning the MAF connector?

[rynaqui]

At the risk of sounding like a broken record, have you tried cleaning the MAF connector?

Yep tried but no difference

They do die and your engine will then run like c**p. Easy to diagnose which one via the injector electrical connector disconnect/reconnect procedure.

Thanks Dave, hoping I can get it all sorted in time..