As tends to be with this particular failure, the story is rather convoluted. As many of you know, I was dyno tuning my car with the help of Rob of Robtuned, and suffered the dreaded intake cam sleeve spin.

https://www.6speedonline.com/forums/...o-warning.html

Anyway, I left the car in the good hands of Topspeed in Alpharetta, Ga which happens to be just a couple miles down the road from where I grew up. Topspeed was in the midst of getting ready to build some 15 extremely high horsepower GTRs to take to Tx2k, and asked if I minded if they had the work done by a local Porsche enthusiast and mechanic Sean Freed of Freed Performance. I knew of him and his work, and he is well regarded in the area, so off it went.

Sean was exemplary to work with. He completed the work in a timely fashion, and always made time to chat with me and answer any questions I had. The work was completed quickly and the car returned. It felt great, but there were some weird readings in the logs that ultimately came down to my aftermarket 3 bar map sensor being replaced with the stock 2.5 bar. After correcting that, there was an issue with the actual intake cam sprocket spinning on the snout of the cam. Sean took the car back and worked extremely hard on getting everything back to normal. It took a couple of tries, and finally a new intake cam actuator/sprocket...but we got there!

I got the car home and started to open it up. Car felt soft, and a bit lethargic. Logs were once again weird. I'm a pretty good diagnostician when it comes to datalogs and it appeared there was some sort of intake restriction. Called up Sean to discuss and within 20 minutes we decided it must be one of the diverter valve signal lines. Bingo, jacked the car up and that was exactly what it was! Threw it back on there and zip tied it back on. Good as new.

Just got back from logging. The car RIPS, and the logs are 100% back to normal. I am so, SO happy to finally have the car back and good as new after a 3.5 month ordeal. One pull through all of second and third gear at full power made it all worth it. I love this car to death!

Huge props to both Topspeed and Freed performance of Alpharetta, Ga for working hard with me and on my car. Both are an asset to the enthusiast community, and Sean Freed is now my go-to guy for any Porsche work I may need in the future.

Many thanks to Rob of Robtuned, Dzenno of PTF, and Mitch of Cobb for the helpful discussion! These guys are also crucial to us and are responsible for much of the advancement 997 tuning scene. Support them as much as you can.

 

Great post! Super happy for you!

 

Thanks Sam. You are also an asset. I haven't gotten a chance to be a customer of yours yet, but I will when I get my 991 turbo one day

 

If you don't mind me asking....why did you go with 1k cc injectors as opposed to 1.3k?

 

1.3k weren't available yet when I did the upgrade and I wasn't planning on running bigger turbos anyway. With the silicon intake pipes, it isn't nearly as hard to swap injectors if the need ever arises.

 

I just picked up a 997 turbo, I hope that this doesn't happen to me.

 

Which error did you get, the P0021??

 

Hey! I've been following your original post and feel for you! I had a question for you and the board.

I have an EVT700 E85 997.1. The car RIPS! I love it! In single gear pulls, the car is flawless. It does appear pretty consistent that if I do multi-gear pulls, the car seems to hesitate or accelerate soft when I shift into the next gear too quickly. I'll give an example.

2nd gear pull -> shift quickly into 3rd and immediately lay on the throttle, the car seems to be hesitant and accelerate cautiously, but then eases into full boost. As apposed to 2nd gear -> soft shift, ease into throttle and then WOT, the car is fine. Does this sound like the diverter valve issue you posted just above? Seems like the cure is to give it a slow paced shift, then WOT the next gear and all is well. If I shift quckly, the car doesn't have the initial boost of power. Just seems as if when WOT in the previous gear, and I let off quickly, it just doesn't have enough time to get into boost right away, but doesn't make total sense. Thanks for reading!

 

Very happy to hear its worked out and your enjoying her now!

 

Thanks John! I look forward to reading your posts around here in the future as well

 

Are you using Cobb for tuning? If so go take some logs and post up the links using datazap.me

Do a single third gear pull, and then a second to third gear run where it feels soft after the shift if you don't mind.

 

I've been following your thread, very happy that you have everything back and running the way it should. The 2 thing that are not fun about this platform is the coolant pipes and spun cam sleeve. One is only a matter of time and the other still seems to have very little information on what the cause is other than possible assembly / design flaw.

Nothing like getting your car back and hitting good clean boost after a few months!

 

Really glad you got this sorted after all the mess and the car's running like a champ again especially since it is still the undisputed 60-130mph stock VTG record holder on both pump gas and E85! (need a better variety of emoticons on here damn it! heh)

Dzenno@PTF

 

Sure thing! Here are 2 different logs:

http://datazap.me/u/997turboguy/log-...5?log=0&data=1


http://datazap.me/u/997turboguy/2nd-...l?log=0&data=1

If I did that wrong, here are the .csv files.

https://www.dropbox.com/sh/ls0yp9vm8...qSq4UaCpa?dl=0

Thanks,

Justin

 

Logs aren't terribly helpful. You need to add boost pressure as a logged variable (nevermind, brain fart, I'm used to looking at boost corrected with my 3 bar map sensor). Get rid of ignition angle for torque intervention. At first glance, your fueling is all over the place and your post shift timing into 3rd gear is way, way lower than in second without any timing pull...likely related to EXTREMELY conservative timing advance as the load increases with the gears.

For a third gear log, go out and put the car in 3rd gear. Slow down until rpm are at 2k and then completely floor it to 7k.

For the second to third gear pass, same thing. Floor it all the way from 2k rpm in second and shift at 7k, stay at wide open throttle to 7k in 3rd.

Make sure you find a safe place to do this, speeds are around 100 mph at 7k in third gear.