996 TT Fuel Problem - 6speedonline.com Forums

Go Back   6speedonline.com Forums > Porsche (Present) > 996 Turbo / GT2
Sign in using an external account
Register Forgot Password?

996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.
Sponsored By Vivid Racing

996 TT Fuel Problem

Reply
 
 
 
 
Thread Tools Search this Thread Rate Thread Display Modes
  #1  
Old 10-05-2009, 06:54 AM
REELDEEP's Avatar
Registered User
 
Join Date: Mar 2009
Location: Fort Lauderdale
Posts: 40
Rep Power: 7
REELDEEP is on a distinguished road
Unhappy 996 TT Fuel Problem

Does anyone know of a fuel problem that occurs to the 996tt. I was driving on I-95 about 70mph, dropped the gear into 4th.... stepped on the throttle and about 90mph the engine let go... I lost all boost and the rpm went to zero. It seemed like an intake hose let loose, telling the engine to shut down.
Took it to the shop. Put it on the lift..Inspected all hoses and undercarriage...no damage found. Put the computer on, no codes reviled any problems. No catastrophic failures. The engine will start up but will only run for 1-2 sec. narrowed it down to a fuel problem....fuel pump quit-(inop). Changed out fuel pump with new. New pump is working but no pressure is reaching the intake side of the fuel filter located in the back. According to the fuel diagram the are no check valves or adjuncts between the fuel pump and filter.
It appears for some strange reason....we can't get fuel pressure into the engine.
I blame this all on the ETHENOL...the shop had two other cars in with fuel related problems.
Does anyone know????
Thanks Pete

Last edited by REELDEEP; 10-05-2009 at 06:56 AM.
Reply With Quote
  #2  
Old 10-05-2009, 09:56 AM
wross996TT's Avatar
Registered User
 
Join Date: Feb 2005
Location: Republic of Boulder
Posts: 4,572
Rep Power: 229
wross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond repute
yes...the fuel line inside your tank ruptured....so the pump keeps pumping the fuel back into the tank. It happened twice to me.

search is your friend
__________________
Statman
04 996TT Cab
Go Buffs!
Fight On!
Reply With Quote
  #3  
Old 10-05-2009, 10:02 AM
Mad Ness's Avatar
Registered User
 
Join Date: Sep 2009
Location: somewhere out there
Posts: 829
Rep Power: 54
Mad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant future
Quote:
Originally Posted by wross996TT View Post
yes...the fuel line inside your tank ruptured....so the pump keeps pumping the fuel back into the tank. It happened twice to me.

search is your friend
yikes. an independent P mech advised me he's seen a hand ful of failed fuel pumps rolling in. ruptured fuel line and failing pumps common on stock fuel systems?
__________________
01 996TT 6spd (RHD): QuaifeLSD, CMstge3, LWFW, Markski Exhaust, K2418G Turbos, 60lb inj, Softronics AP: Ypipe Custom 3" piping & Hoses / TBKit/ IC/ Fpipe & Diverters/ ShortShift/ DualIntake/ Headers/EVOMSTurboInlet/GT2slave, S.B.Links, WevoEngineMounts, KW V3, H&R SB, Mode, gt3 arms, full monoball bush, tarett caster F/R, AP dog bones, GMG F/R tie/steer rods, Brembo GT F/R15", DSS Level 5 drive shafts, VOLKTE3719"/Jongbloed18"
Reply With Quote
  #4  
Old 10-05-2009, 11:02 AM
wross996TT's Avatar
Registered User
 
Join Date: Feb 2005
Location: Republic of Boulder
Posts: 4,572
Rep Power: 229
wross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond repute
Quote:
Originally Posted by Mad Ness View Post
yikes. an independent P mech advised me he's seen a hand ful of failed fuel pumps rolling in. ruptured fuel line and failing pumps common on stock fuel systems?
fuel pumps have been a weak spot for Porsche....the fuel lines is a mystery. There is a hypothesis that Ethanol doesn't play well with the polymer used in the fuel lines...although if that were true fuel lines would be failing all over on all European cars (they use less ethanol in Europe). I thought it might be toluene as my lines failed when I was filling up with 100 octane....I called the VP of technology for VP fuels and he said the basic chemistry of pump fuel and VP 100 was the same....so who knows.
__________________
Statman
04 996TT Cab
Go Buffs!
Fight On!
Reply With Quote
  #5  
Old 10-05-2009, 01:00 PM
RacinTwinJason's Avatar
Registered User
 
Join Date: Feb 2009
Location: L.A
Posts: 731
Rep Power: 98
RacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond repute
I'm actually putting the new pump in as we speak.. Same exact problem!!
__________________
EVOMS/957TT/
EVOMS/996TT
Reply With Quote
  #6  
Old 10-05-2009, 01:18 PM
Registered User
 
Join Date: Aug 2009
Location: Texas
Posts: 13
Rep Power: 0
dan2357 is on a distinguished road
Fuel Lines

Has anyone contacted Porsche directly for a response to this problem, no recalls?
Has anyone found a good fix to this situation??
Reply With Quote
  #7  
Old 10-05-2009, 02:09 PM
jjbravo's Avatar
Registered User
 
Join Date: Nov 2008
Location: Upstate, NY
Posts: 847
Rep Power: 107
jjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond reputejjbravo has a reputation beyond repute
Porsche knows. They've at least updated the parts when the EPA heard there was a fuel leak problem. Their response to the govt is that the leak is internal to the tank, and the bad parts have been removed from stock. The new p/n ends with -02.
Porsche pays nothing for those out of warranty.

Well I found a memo from Porsche to EPA because it is a fuel system problem stating that a bit over 8% of the newer 996TT's had pump failures but no release to atmosphere of fuel. The corrective action is a revised part and old parts pulled from shelf.
Huh. I wonder as this is a report on the "newer" 996TT's. I wonder what the failure rate of the old ones are given the longer exposure to ethynol.
Also, 8% were covered by warranty. I wonder if another 20-30% or more were out-of-pocket? Mine is going on it's second replacement pump on a 20k mile car and I'm a little hot about buying a $500+ pump that's known to be a problem. Hopefully the newest incarnation does the trick. Just wish Porsche would pick up the part, I'll eat the tow.

Here's a link to the memo.

http://www.regulations.gov/fdmspubli...ontentType=pdf
__________________
Sold... Great car: 03TT: Arctic Silver, Aerokit, EPL 16/16G's, PSS10's and Mode plates, Milltek, DCT steering wheel, Console delete, Rennline mats and extinguisher.

Last edited by jjbravo; 10-05-2009 at 02:20 PM.
Reply With Quote
  #8  
Old 10-05-2009, 02:52 PM
Registered User
 
Join Date: Aug 2009
Location: Texas
Posts: 13
Rep Power: 0
dan2357 is on a distinguished road
Fuel Lines

Thanks for the info; Im looking at it.
Reply With Quote
  #9  
Old 10-05-2009, 06:29 PM
RacinTwinJason's Avatar
Registered User
 
Join Date: Feb 2009
Location: L.A
Posts: 731
Rep Power: 98
RacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond repute
So just installed a brand new stock fuel pump. Did not fix my problem just put a dent $550. So the car still shuts off. It has the Evoms GT700 fuel lines. I don't know what else to check.
__________________
EVOMS/957TT/
EVOMS/996TT
Reply With Quote
  #10  
Old 10-05-2009, 07:24 PM
RacinTwinJason's Avatar
Registered User
 
Join Date: Feb 2009
Location: L.A
Posts: 731
Rep Power: 98
RacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond repute
Gt700 shutting off

what else should one look for?
__________________
EVOMS/957TT/
EVOMS/996TT
Reply With Quote
  #11  
Old 10-05-2009, 07:30 PM
wross996TT's Avatar
Registered User
 
Join Date: Feb 2005
Location: Republic of Boulder
Posts: 4,572
Rep Power: 229
wross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond reputewross996TT has a reputation beyond repute
I would contact EVOMS...
__________________
Statman
04 996TT Cab
Go Buffs!
Fight On!
Reply With Quote
  #12  
Old 10-05-2009, 07:40 PM
2fas4u's Avatar
Registered User
 
Join Date: Mar 2006
Location: north carolina
Age: 46
Posts: 173
Rep Power: 15
2fas4u is on a distinguished road
Lightbulb from pump to injectors

If your Pump is new and your lines are gt700 then check your fuel filter. Make sure your

getting gas that far and if so, check that fpr. Next the injectors if all is well and still no go.

Time to get drastic, would your hp require you to have an inline pump and or 5bar fpr, if you

don't have these already. However if you do then I would (and I know you're not me) spray

gas in the intake to know for sure that I had a fuel problem and not a computer problem. Just

my .02 I bet you know all this anyways, hope you get it fixed.
Reply With Quote
  #13  
Old 10-05-2009, 07:51 PM
RacinTwinJason's Avatar
Registered User
 
Join Date: Feb 2009
Location: L.A
Posts: 731
Rep Power: 98
RacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond reputeRacinTwinJason has a reputation beyond repute
Quote:
Originally Posted by 2fas4u View Post
If your Pump is new and your lines are gt700 then check your fuel filter. Make sure your

getting gas that far and if so, check that fpr. Next the injectors if all is well and still no go.

Time to get drastic, would your hp require you to have an inline pump and or 5bar fpr, if you

don't have these already. However if you do then I would (and I know you're not me) spray

gas in the intake to know for sure that I had a fuel problem and not a computer problem. Just

my .02 I bet you know all this anyways, hope you get it fixed.
On the Gt700 there is only the stock fuel pump, no additional pumps are needed at this level, anything higher it might. What's the best way to check injectors?
__________________
EVOMS/957TT/
EVOMS/996TT
Reply With Quote
  #14  
Old 10-05-2009, 09:37 PM
Mad Ness's Avatar
Registered User
 
Join Date: Sep 2009
Location: somewhere out there
Posts: 829
Rep Power: 54
Mad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant futureMad Ness has a brilliant future
thanks for the info. i hope you guys sort out the problem. no fuel in atmosphere but this could be catostrophic if failure occurs at WOT, time to do a search on aftermarket fuel pumps...
__________________
01 996TT 6spd (RHD): QuaifeLSD, CMstge3, LWFW, Markski Exhaust, K2418G Turbos, 60lb inj, Softronics AP: Ypipe Custom 3" piping & Hoses / TBKit/ IC/ Fpipe & Diverters/ ShortShift/ DualIntake/ Headers/EVOMSTurboInlet/GT2slave, S.B.Links, WevoEngineMounts, KW V3, H&R SB, Mode, gt3 arms, full monoball bush, tarett caster F/R, AP dog bones, GMG F/R tie/steer rods, Brembo GT F/R15", DSS Level 5 drive shafts, VOLKTE3719"/Jongbloed18"
Reply With Quote
  #15  
Old 10-06-2009, 02:48 AM
S4corrado996TT's Avatar
Registered User
 
Join Date: Apr 2007
Location: Taiwan
Posts: 575
Rep Power: 34
S4corrado996TT is just really niceS4corrado996TT is just really niceS4corrado996TT is just really niceS4corrado996TT is just really nice
Tks for sharing info!
__________________
2011 M-Benz GLK 300
2007 BMW E87 130i
2002 Protomotive PE600 K24/20G 996TT Lapis Blue
2001 Audi S4 widebody conversion AWE RSKO4 460hp
1992 VW Corrado G60
Reply With Quote
Old 10-06-2009, 02:48 AM
 
 
 
Reply

Tags
996, 996tt, broken, check, fuel, gas, issue, leak, line, porsche, problem, pump, rupture, turbo, valves


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Join 6SpeedOnline
Visit our Sponsors

All times are GMT -6. The time now is 06:04 PM.


Secure Backup