997.1 Power Issue After X-Pipe Install
Thread Starter
Advanced
Joined: Jun 2020
Posts: 91
Likes: 37
From: Colorado
I have the Fabspeed 200 cell X-pipe and none of these issues. Someone messed up something with the X-pipe install, probably related to the O2 sensors? Any CELs or codes? What are they?
The O2 sensors are color coded per side - blue on one side and grey on the other. The other thing I've seen people do is not disconnect them from the connection blocks at the rear of the engine compartment and jsut unscrew them with the connection end still connected and then rescrew them in - this is way too much twisting of the wires for them to survive, but people that don't know how easy they are to disconnect and reconnect do it the wrong way and damage them - they're not cheap!
The O2 sensors are color coded per side - blue on one side and grey on the other. The other thing I've seen people do is not disconnect them from the connection blocks at the rear of the engine compartment and jsut unscrew them with the connection end still connected and then rescrew them in - this is way too much twisting of the wires for them to survive, but people that don't know how easy they are to disconnect and reconnect do it the wrong way and damage them - they're not cheap!
RL Community Team
Rennlist Member
Rennlist Member
Joined: Oct 2007
Posts: 28,647
Likes: 8,436
From: Clemson, SC
Go to the back of the car and in each corner are the connection blocks for the O2 sensors. You lift the locking clip and the plugs just lift out. For starters, make sure they're connected to the correct ports and on the correct sides. If I recall, it is obvious which one should go where and the grey wire sensors go on the grey plugs side and the blue wire sensors on the blue plugs side.
Thread Starter
Advanced
Joined: Jun 2020
Posts: 91
Likes: 37
From: Colorado
Go to the back of the car and in each corner are the connection blocks for the O2 sensors. You lift the locking clip and the plugs just lift out. For starters, make sure they're connected to the correct ports and on the correct sides. If I recall, it is obvious which one should go where and the grey wire sensors go on the grey plugs side and the blue wire sensors on the blue plugs side.
Thread Starter
Advanced
Joined: Jun 2020
Posts: 91
Likes: 37
From: Colorado
Here are some scans from my car while at idle.
Car is still acting very strange. The hesitation is 100% reproducible. If I am driving at low speed, coasting, and blip the gas, it bottoms out and then downshifts. ALSO. If I do a 0-60 run, and step on the gas from 1st, the car hesitates, then wakes up and revs through the power band normally.
To recap:
997.1 S Tiptronic
GT3 Throttlebody
IPD Plenum
GIAC tune
No problems at all. Car was fast as ****.
THEN added Fabspeed X-pipe and new O2 sensors, and that’s when the trouble started. Shop says the O2 sensors are in correct order.
RL Community Team
Rennlist Member
Rennlist Member
Joined: Oct 2007
Posts: 28,647
Likes: 8,436
From: Clemson, SC
So the GT3 throttle body and ipd plenum were already installed prior to the X-pipe or done at the same time?
Your bank 1 and bank 2 long term fuel trim numbers look odd like you may have a vacuum leak, which is usually at the plenum when installed as it's tough to get the rubber ends on properly.
You have a smoke test machine?
Your bank 1 and bank 2 long term fuel trim numbers look odd like you may have a vacuum leak, which is usually at the plenum when installed as it's tough to get the rubber ends on properly.
You have a smoke test machine?
Thread Starter
Advanced
Joined: Jun 2020
Posts: 91
Likes: 37
From: Colorado
So the GT3 throttle body and ipd plenum were already installed prior to the X-pipe or done at the same time?
Your bank 1 and bank 2 long term fuel trim numbers look odd like you may have a vacuum leak, which is usually at the plenum when installed as it's tough to get the rubber ends on properly.
You have a smoke test machine?
Your bank 1 and bank 2 long term fuel trim numbers look odd like you may have a vacuum leak, which is usually at the plenum when installed as it's tough to get the rubber ends on properly.
You have a smoke test machine?
Thread Starter
Advanced
Joined: Jun 2020
Posts: 91
Likes: 37
From: Colorado
So the GT3 throttle body and ipd plenum were already installed prior to the X-pipe or done at the same time?
Your bank 1 and bank 2 long term fuel trim numbers look odd like you may have a vacuum leak, which is usually at the plenum when installed as it's tough to get the rubber ends on properly.
You have a smoke test machine?
Your bank 1 and bank 2 long term fuel trim numbers look odd like you may have a vacuum leak, which is usually at the plenum when installed as it's tough to get the rubber ends on properly.
You have a smoke test machine?
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Joined: Mar 2017
Posts: 2,805
Likes: 771
From: Philadelphia, Pennsylvania
Regardless, I am more than happy to help you work through it. Shoot me an email so we can connect - Service@Fabspeed.com
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Porsche's Top 5 Most Questionable Naming Decisions
Verdad Gallardo
Pogea Racing's 964 Porsche 911 Reimagination Stands Out in a Crowded Field
Verdad Gallardo
6 Convertible Top MYTHS Most People Don't Understand!
Michael S. Palmer
2026 Porsche 911 Club Coupe is Spectacular, And Everything Wrong with the Porsche Market
Joe Kucinski
Talos Takes Your 991 Porsche 911 GT3 to the Next Level for a Cool $1.13 Million
Verdad Gallardo
9 Vehicles Porsche Helped Engineer that Aren't Porsches
Verdad Gallardo
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Thread Starter
Advanced
Joined: Jun 2020
Posts: 91
Likes: 37
From: Colorado
Extremely unlikely that it would be related to the X-pipe, it wouldn't cause those codes. Typically only P430/420 for Cat inefficiency.
Regardless, I am more than happy to help you work through it. Shoot me an email so we can connect - Service@Fabspeed.com
Regardless, I am more than happy to help you work through it. Shoot me an email so we can connect - Service@Fabspeed.com
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Joined: Mar 2017
Posts: 2,805
Likes: 771
From: Philadelphia, Pennsylvania
The only reason I point to the x-pipe is that the issue started IMMEDIATELY after the x-pipe was installed. Before the x-pipe, the car was running flawlessly. The only thing that changed were sensors and the x-pipe. The sensors have been completely replaced, a second time, still an issue.
My reason for thinking it is unrelated to the X-pipe, and just a coincidence, is that the only portion of the X that has the potential to cause codes is the cats themselves. Which do not seem to be relevant to the codes you're showing. regardless all our products carry lifetime warranties, so you're more than welcome to send it in for testing as well!
Thread Starter
Advanced
Joined: Jun 2020
Posts: 91
Likes: 37
From: Colorado
I understand your frustrations completely, that is why I want to connect and see if our Engineers cant work to find a solution for you!
My reason for thinking it is unrelated to the X-pipe, and just a coincidence, is that the only portion of the X that has the potential to cause codes is the cats themselves. Which do not seem to be relevant to the codes you're showing. regardless all our products carry lifetime warranties, so you're more than welcome to send it in for testing as well!
My reason for thinking it is unrelated to the X-pipe, and just a coincidence, is that the only portion of the X that has the potential to cause codes is the cats themselves. Which do not seem to be relevant to the codes you're showing. regardless all our products carry lifetime warranties, so you're more than welcome to send it in for testing as well!
Instructor
Joined: Mar 2012
Posts: 135
Likes: 26
From: North Shore, MA
To me it sounds like a vacuum leak on a intake plenum boot. Is it possible that when you did the IPD that a boot clamp might have been loose or sealed incorrectly and just cooincidently just lost vacuum at same time you did the X-Pipe?
Thread Starter
Advanced
Joined: Jun 2020
Posts: 91
Likes: 37
From: Colorado
I talked to the shop today. My car is staying over the weekend. They have tested, tested and tested, and it seems to be coming back to the Fabspeed x-pipe. Fabspeed wants them to pressure test the x-pipe. At this point, I am ready to throw the x-pipe in the river and put my old cats back on. The car was perfect before the x-pipe went on, and now it is 100% reproducible on the brink of stalling.
