Would be more like an endoscopy, no?

 

More like laparoscopy, yes?

 

If that picture is accurate why would they even use DFI? With valve open, wouldn't it make sense to use port injection?

 

Just need a longer hose!

 

The assumption by some is that if other designs of DI engines have issues then Porsche has to also. Is it possible that the Boxter design engine (horizontal) prevents this issue?

 

It's been a while and they were exceptionally vague about what they did. I think the CEL was going off due to a misfire. They addressed that (may have changed coils/plugs or something obvious, like I said, I don't really remember and the service records are archived). The car ran fine for about a week and the CEL went off again (misfire). This time they kept it for a week and tried something else; drained the fuel tank and did a few more tweaks. Get the car back and about two weeks later the CEL goes off again. Back to Audi and it's in the shop for another week, this time waiting for the area rep to look at it. They accuse us of using cheap gas but I have every VISA receipt for the past ten years (correlated with the appropriate charge on a spreadsheet) and dug out all the gas purchases for the car (premium but the 91 crap we get in CA). Got the car back, and this time they didn't really say what they did - adjusted this and that, etc. Three weeks later, CEL again. This time it's in the shop for two weeks and they expose the valves and find a pretty significant carbon buildup. They called the area rep, clean off the build-up and give us back the car. Soon thereafter the CEL comes on again and this time we initiated the lawsuit. I remember reading the deposition of the area rep (or some Audi official familiar with the issue) and it was particularly vague and he talked around any specifics of what was causing the problem. Interestingly, it was soon after that deposition that they settled. At no time, other the CEL being on did the car run rough or have any problems.

After we settled the CEL would go on and off intermittently and during a service it was reported that there was throwing misfire codes. It is probably still misfiring but the CEL doesn't go off anymore (it was on and off so much the bulb probably blew out!). It's a third car for errands/hauling now and seldom ever gets driven more than 40 miles at a time so, considering the
what we paid for it after the settlement, it fits that role pretty well.

 

No....

 

the dfi engine on our cars do not have a problem. Porsche knew the problem from previous issues by the other manufacturers. they incorporated a design where the first spritz of the fuel hits the open intake valve and then the main spritz for the power. no worries for dfi owners. same basic architecture still used in the new cars. after almost 4 years no real documented evidence. all i know is as my car ages if feel it actually gaining strenght!! everything to be flowing more freely. and recently with an air filter change i hear her growl some more.