Matt E.

Ok, so there's no way to do an actual leak down test? I want to monitor fuel pressure after the engine is shut down. This is to see if the fuel is bleeding back into the tank and causing the hard start/long crank time issue.

Ok, so I was planning on doing a full pressure leak down test today but it doesn't look like there is a port to tap into, probably because of the high pressure pump. Obviously I can't do it with the scan tool because the if the ecm is powered up the electric pump is maintaining pressure. In your last post Steve you mentioned monitoring the pressure on a scan tool during startup. How do you do this? My scan tool takes a little time to connect to the vehicle. I would imagine that by the time it links up the pump will have overcome any pressure loss. Thanks again for all the help. Matt

Steve, I was leaning toward regulator or pump. Seems that they're similarly priced. I was hoping one was considerably cheaper and I'd try that first, but no luck. Have you ever heard of either of those two components causing a random misfire under load?

Ok, will do. Thanks

Yeah, the battery is good.

Ok, so I got my hands on an OBD11 and on VAG (I think that's what it was). They both, and my snap on scanner, show no active or inactive codes. I experienced the hard start problem today. I drove the car for about 10 minutes. Shut it down for maybe 10-20 minutes and when I tried to start it again it cranked for a cycle without starting. After a couple revs into the second attempt it fired up and ran fine. It seemed like the fuel line drained back but it only seems to happen when restarting after sitting for a short period. If the car sits overnight it starts fine.

Ok, thanks

Do you have a recommendation on what scan tool I should use? Or, does anyone have a recommendation for a reputable Audi shop in central New Jersey? I've dealt with a couple and was not very happy. Thanks

I am aware of that issue which is why I pointed out the type of scanner I was using. There is no check engine light, nor has there been. I have pulled misfire codes from this car before with that scanner (that time it just needed plugs and coils) and it is showing the misfires on the previous cycle. I think it just doesn't misfire enough times to trigger the code.

Thanks for the update

Have you figured out what's wrong yet? My son has a 2015 A3 2.0t premium plus and he is have the exact same issue.

Hi, I'm new to the forum. My son has a 2015 A3 2.0t premium plus. It has a random misfire under load. It's usually right after it shift into 2nd or 3rd around 2000rpm, give or take. It'll misfire a few times but go away if you continue to accelerate. I work on heavy trucks and have a heavy truck scanner. I was able to check codes with it and no active or inactive codes are set. When I look at the misfire parameters all four cylinders show 3 or 4 misfires on the last drive cycle. My son also said that intermittently he has a hard start condition (I have not experienced the hard start). It's very intermittent but seems like it only happens when the engine is warm. Has anyone had similar issues or any ideas what might be causing this? Thanks! Matt