When diagnosing such odd computer/electronics issues, it is just a common and good diagnosis procedure to go to a default and known state on all parts. It may not be the flashed ECU, but they want to eliminate that as the possible source of the problem.

Something has gone awry and that needs to be addressed. Once that is solved and the cause found, then you can always reflash it again.

 

It's over at Sonnen in Marin. They are awaiting the CPU at Sharkwerks and Dan said they will be fast turn around. Thanks Dan. So, now we wait. Heck, I had the Rennline front screen put in while I'm waiting.

 

Update. They sent the ecu to Sharkwerks who unflashed the computer and sent it back. Meanwhile they Sonnen upgraded the software on the Pdk. Guess what now one is not talking with the other. What the ****. This is starting to bug me a bit cause the car drove in their problem free....hey, maybe they will give me a new 911. Yeah right, anyhow still driving the boat panamera. Only good that has come of this.....would not but a Panamera.

 

Well, that means the flash of the ECU wasn't the issue, there is a different problem in the system that they need to resolve. Its a problem that occurred from them fiddling with it. Maybe some basic computer handshake/setting they needed to do after the service they had performed that they forgot?

 

I agree so do the Sharkwerks guys. I hope they get it straight soon..cause I miss my baby. If all else fails I hear they will just put in a new Ecu. It's obvious that the tech made a mistake. But, as long as they rectify it and my car runs great like it did...with some kind of something in it for me for having my car for so long....geeze it was just to switch out the fuel pump after all.

 

Update, new CPU being installed tomorrow. Hopefully this will solve the mystery. We shall see tomorrow.

 

I also had problems when my previously running fine 09c2s had the HPFP recall done. Got the car home and it was leaking coolant all over. They crushed a gasket on the water pump during the recall work. Flatbed back to dealer. What ticked me off is the aluminum tube that goes into water pump was all wrenched up. Looked like a vise grip job. Anyway, since getting it back, it struggled upon cold start, time and time again. I was planning on taking it in, but 2 weeks ago I did a track session and ever since, the car starts like it used to. Still leaves me with zero confidence that today's auto tech can diagnose and fix anything. They simply read the computer read out and replace parts these days. And they never did replace that wrenched up tube, even though I requested it to be. I need to find a good Indy.

 

They put in a new computer now the car starts. The PDK needs to talk to the ecu. So, hopefully they get that fixed. I will be looking at the "wrench job," ugh I hope it does not happen to me. You are so right the techies are not up to snuff these days.

 

I got my car back. Yippppieeeee! So, they put in a new ecu and I have new Pdk software. So, what was the problem? It was the tech machine. It was skipping over code and could not update the ecu properly. So, during the process it fried the ecu. So, the tech from Porsche main office came in saw the problem in fifteen minutes. Now the bad news my flash is gone. Damn, what a difference the flash made in feel, power, acceleration. But, if I get it reflashed which the boys at Sharkwerks said they would do...my warranty would be in jeopardy. Before the shop told me know problem flash it. Now, that they had to replace some parts they stated if I reflashed I'd be on my own. God, what a predicament. Good news is my car is back after two weeks and I added a new mod...I got the Rennline front grill. Wil post pics of that tommorrow.

 

Had mine replaced a few months ago. No problem since.

I hear you guys say you have problems with "cold starts". I know what a cold start is, but what would you consider a problem? My car generally takes 1-1.5 sec to fire. Being my first Porsche <modern> I asked my sales guy about it as it was not the instant on like my Honda Accord. He said it was totally normal and that the high compression engine almost always takes a second or two to turn and fire. Would you guys agree?

 

Never seen that. Mine fires up right away.

 

I hear ya, it's not that there is a real delay in my car starting it's more of wondering how long those who were having a hard time cold starting would take. Is it like crank crank crank...nothing....crank crank crank....fire. Mine fires up fine <it's never not fired up in the first second>I'm just wondering how long those having problems takes to actually fire. Honesty, I saw 0 change from the way my car started and ran before the HPFP change out to after. I actually had to look and see they actually changed it out lol.

 

The pre-pump in the tank has to build up the fuel to the main pump which needs to build up the fuel pressure to run the high pressure fuel system before it injects fuel, I expect, so there maybe be a few cranks of the engine by the starter before the fuel shows up and the thing fires... does that sound likely?

 

I noticed mine starts just about half a beat slower after the replacement.
Nothing horrible. But definitely not the same as before.
Maybe it resolves after a while. I just picked up the car last Saturday.

 

I was wondering how long this would take.