Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > 1- Porsche Technical Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Aug 2007
Location: Denver CO
Posts: 293
Car dies at stop lights

My car starting to die at stop lights today unless I kept my foot on the throttle a little. I suppose I could adjust my idle up a little but I don't know why all the sudden this started to happen. Any ideas?
__________________
1979 930 Euro
50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!!
Old 05-10-2008, 05:20 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
sudo apt-get purge 930
 
equality72521's Avatar
 
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,840
So you're saying the idle is dropping to the point of shut down? Is it hunting while doing this or is it simply dropping? Does the engine start popping? Try to describe exactly what happens from normal running to shutdown.
__________________
Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL***

"Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing"
--clutch-monkey
Old 05-11-2008, 03:11 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
Join Date: Aug 2007
Location: Denver CO
Posts: 293
It's wierd it doesn't happen at every stop but probably happened 4-5 times when I went for a 45 minute ride. It doesn't make any popping noises or surges just idles down till it dies. It is sorta like when you try to shut off a motorcyle or snowmobile by turning on the choke. But if I have my foot on the gas just the slightest it is fine. It never had any problem like this before, so I don;t think that just adjusting the idle screw is the right way to fix it..
__________________
1979 930 Euro
50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!!
Old 05-11-2008, 07:03 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
sudo apt-get purge 930
 
equality72521's Avatar
 
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,840
Sounds like possibly the air meter switch is bad or needs adjustment if that's possible. The switch is there to shut off the fuel pumps in the event of an accident (ignition on but engine off). It opens or closes (I can't remember which) when air is flowing past the meter plate and this lets the pumps run. If you had an accident and the engine shut off there would be no air flow past the meter plate and so the pumps would stop. It seems as if the sensor is sometimes thinking there is no air flow but as you press the accelerator a little it overcomes the open/closed (whichever it is) condition and allows it to keep running.
__________________
Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL***

"Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing"
--clutch-monkey
Old 05-11-2008, 01:04 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
Join Date: Apr 2008
Posts: 138
sounds like an airleak somewhere. had the same problem with my 3.3t, checked all the hoses but everything was tightened and in good condition. took the intercooler off finally just to discover that the throttle body o-ring was damaged. the car ran flawless while rolling, problem only occured at idle. also noticed that when i touched the throttle just slightly the car wont shut down. raising the idle wont help here at all. check all the hoses and if nothing helps take off the intercooler and inspect the o-ring.
Old 05-11-2008, 03:02 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
Join Date: Aug 2007
Location: Denver CO
Posts: 293
thanks will check that out.
__________________
1979 930 Euro
50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!!
Old 05-11-2008, 05:52 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered User
 
Join Date: Feb 2007
Location: Columbia, MD
Posts: 35
Send a message via AIM to dholling13
Sounds like the infamous orange o-ring that is seated on the throttle body where the intercooler connects.
__________________
1991 Zermat Silver 964 turbo w/ lots of goodies.
Old 05-12-2008, 04:19 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
Join Date: Aug 2007
Location: Denver CO
Posts: 293
Cool I have a new spare of that one too I can check with.
__________________
1979 930 Euro
50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!!
Old 05-12-2008, 06:11 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered User
 
Join Date: Aug 2007
Location: Denver CO
Posts: 293
Quote:
Originally Posted by equality72521 View Post
Sounds like possibly the air meter switch is bad or needs adjustment if that's possible. The switch is there to shut off the fuel pumps in the event of an accident (ignition on but engine off). It opens or closes (I can't remember which) when air is flowing past the meter plate and this lets the pumps run. If you had an accident and the engine shut off there would be no air flow past the meter plate and so the pumps would stop. It seems as if the sensor is sometimes thinking there is no air flow but as you press the accelerator a little it overcomes the open/closed (whichever it is) condition and allows it to keep running.

Ok Update took the intercooler on and off to check the oring. Still having the problem. It does not do it when its cold on after it is warmed up, also it won't do it in gear. It dies when I push in the clutch coming to a stop sign only it seems. Any other ideas? Can I check that air flow switch some how?
__________________
1979 930 Euro
50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!!
Old 05-17-2008, 04:14 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
"I wuz the liquor..."
 
sand_man's Avatar
 
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,487
I wonder if it's possible that your WUR (Warm Up Regulator) is out of spec? There is a spec for the cold pressure, the warm pressure, and full thottle enrichment pressure. I wonder if the warm pressure is out of wack? You would need a CIS pressure gauge to check it...the gauge is good to have anyway.
__________________
-jeff
back in the saddle: '95 993 - just another black C2
*SOLD*: '87 930 GP White - heroin would have been a cheaper addiction...
"Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP)
Old 05-18-2008, 02:47 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Registered User
 
Join Date: Aug 2007
Location: Denver CO
Posts: 293
sandman, thanks for the idea. i will try to get a cis gauge so i can check that
__________________
1979 930 Euro
50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!!
Old 05-18-2008, 11:50 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
Join Date: Aug 2007
Location: Denver CO
Posts: 293
Update-

Today I put on a new orange o ring even though I thought the one I have on was good. Started car, let idle for 5-10 mins and it was fine. Took it for a drive and it seemed good, thought it was fixed, then it started happening again when I got off the freeway. Pushed the clutch in to downshift on the off ramp and it died. Also I noticed that the ecu box underneath the seat clicks at the moment or right before it dies. When I got home I let it idle in nuetral for a bit and it was ok, little lower idle rpm then i remember it having before but it didn't die out right away like when I put the clutch in to stop. I wasn't able to find cis gauge today.
__________________
1979 930 Euro
50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!!
Old 05-18-2008, 02:00 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
sudo apt-get purge 930
 
equality72521's Avatar
 
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,840
You don't have an ECU in your car, I believe that is the O2 sensor module.
__________________
Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL***

"Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing"
--clutch-monkey
Old 05-18-2008, 02:45 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,427
Garage
The Lambda/O2 loop functions only at idle. This could be your culprit.
An off-spec lean idle would cause the engine to die.
__________________
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 05-18-2008, 05:44 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #14 (permalink)
Registered User
 
Join Date: Aug 2007
Location: Denver CO
Posts: 293
Quote:
Originally Posted by RarlyL8 View Post
The Lambda/O2 loop functions only at idle. This could be your culprit.
An off-spec lean idle would cause the engine to die.
So are you saying that 02 electric box could be bad? I didnt even think my car had a 02 sensor, i will have to go look.
__________________
1979 930 Euro
50k:Lindren Green:B&B Dual Out Pipes:K27:965 I/C: --SOLD!!
Old 05-18-2008, 05:50 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #15 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 01:52 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.