UrS4 - misfire

[PRY4SNO]

Car misfires at idle & under throttle. Improves when warm. Pulled 2312, and replaced the G62 sensor.

Then I soldered a new 2-pin plug onto the engine harness because the old one broke apart when I touched it.

Still misfires.

Where should I look next?

[EDIGREG]

If OE coils, look to the power output stages. You can swap them from a handful of other Audi/VW motors

[loxxrider]

Yep, only time I've had misfire at idle it's been because of coils.

[PRY4SNO]

Good tip guys, thanks. I'll hit up a buddy for spares.

[loxxrider]

That being said, usually I've experienced coils getting worse with heat... Could be vac leak if the car is still on MAF.

[themagellan]

I too have a weird misfire but mine is only at low throttle after hard cornering… I think it may be related to blow by… (thread jack)

[PRY4SNO]

Dave K. on QW recommended to pull the red ECU power fuse to clear the codes... so I'll try that first then look into the POS & coils or injectors. Thanks guys!

I too have a weird misfire but mine is only at low throttle after hard cornering… I think it may be related to blow by… (thread jack)

No worries! Nice to keeps solutions to a common issue handy in one tidy location.

[PRY4SNO]

Reset the ECU, ran perfect first time I ran the car. Misfires again as soon as I cranked her over the next time tho.

Will try the injectors and POS tonight when I meet up with a buddy who has a urs6.

[morris400]

I'll try to get my POS off the fire wall tomorrow. If I can you can swap to see if it helps. They did not want to budge last time I tried lol