Parts Catalog Accessories Catalog Tech Info Tech Forums
 
  Search our site:    
 Cart  | Project List | Order Status | Help    



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

Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
930s rule the wasteland
 
h20cooled7's Avatar
 
Join Date: Dec 2006
Location: Spotsylvania ,Virginia
Posts: 1,195
Send a message via AIM to h20cooled7
Question hot restart problem? 80 930 turbo

car runs fine ,cut it off run in store 10 mins try to start just cranks
I let it sit for 20 mins it will pop then cut off it will do this for another 15 mins and then start and run. I can hear the fuel pumps running the whole time so the relay is good. when it 1st happend i tried letting the pump run for 30 seconds but it wouldnt hit. when it did fire it was misfiring but clears up after a minute. it will only do this if i cut it off for a few minute hot. otherwise it wont cut off while driving. should i start with the fuel accumulator 1st ? i do have spark off the coil and its not really humid outside. if any1 has the fix any input would be much appreciated
pete
__________________
1980 930 Turbo
1993 Corrado
1983 944
1984 944
2001 VW golf TDI
Old 02-17-2007, 12:21 PM
  Pelican Parts Technical Article Directory    Reply With Quote #1 (permalink)
sudo apt-get purge 930
 
equality72521's Avatar
 
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,841
Sounds like the accumulator. Put some gauges on and check residual pressure.
__________________
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 02-17-2007, 12:52 PM
  Pelican Parts Technical Article Directory    Reply With Quote #2 (permalink)
930s rule the wasteland
 
h20cooled7's Avatar
 
Join Date: Dec 2006
Location: Spotsylvania ,Virginia
Posts: 1,195
Send a message via AIM to h20cooled7
ok what if pressures dont bleed down, then where do i go?
__________________
1980 930 Turbo
1993 Corrado
1983 944
1984 944
2001 VW golf TDI
Old 02-17-2007, 01:06 PM
  Pelican Parts Technical Article Directory    Reply With Quote #3 (permalink)
sudo apt-get purge 930
 
equality72521's Avatar
 
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,841
I don't know, I had that exact problem and it was the 28 year old accumulator. Replaced it and problem solved, I never had to troubleshoot further. I'm sure the experts on here will chime in with useful info that I'm unaware of. I can only relate my experience. However, check your pressure to see if that's your problem. You have to start somewhere and that's the place I'd start.
__________________
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 02-17-2007, 01:15 PM
  Pelican Parts Technical Article Directory    Reply With Quote #4 (permalink)
A fellow Pelacanite
 
NathanUK's Avatar
 
Join Date: Nov 2006
Location: UK
Posts: 2,002
Garage
Agreed.
__________________
1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 02-17-2007, 01:23 PM
  Pelican Parts Technical Article Directory    Reply With Quote #5 (permalink)
930s rule the wasteland
 
h20cooled7's Avatar
 
Join Date: Dec 2006
Location: Spotsylvania ,Virginia
Posts: 1,195
Send a message via AIM to h20cooled7
can i ask a stupid question? if im losing pressure hot why will the car restart no problem cold? shouldnt i have no pressure cold too?
pete
__________________
1980 930 Turbo
1993 Corrado
1983 944
1984 944
2001 VW golf TDI
Old 02-17-2007, 04:23 PM
  Pelican Parts Technical Article Directory    Reply With Quote #6 (permalink)
930s rule the wasteland
 
h20cooled7's Avatar
 
Join Date: Dec 2006
Location: Spotsylvania ,Virginia
Posts: 1,195
Send a message via AIM to h20cooled7
you guys see injectors leak down on these motors?
__________________
1980 930 Turbo
1993 Corrado
1983 944
1984 944
2001 VW golf TDI
Old 02-17-2007, 04:25 PM
  Pelican Parts Technical Article Directory    Reply With Quote #7 (permalink)
Moderator
 
Porschephd's Avatar
 
Join Date: Aug 2002
Location: OverlandPark KS (Kansas City)
Posts: 521
Because the cold start injector will kick start the system. After 10 minutes the CS is off and the fuel plate pulls down and the fuel lets the car fire off. If the pressure bleeds off and the system is wihtout fuel hot is vapor locks the fuel head and takes some time to force fuel through it.

Check the rest system pressure 10 and 20 minutes rest.
__________________
Stephen
94 3.6Turbo 6-speed AWD
Old 02-17-2007, 06:28 PM
  Pelican Parts Technical Article Directory    Reply With Quote #8 (permalink)
sudo apt-get purge 930
 
equality72521's Avatar
 
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,841
Like Porschephd said, vapor lock. If you don't maintain fuel pressure it bleeds off and the remaining fuel in the line vaporizes when the engine is hot. When that happens your car is trying to start on fumes. After the engine cools the fuel condenses back to a liquid, albeit a low pressure liquid. Once you start the car, the pumps bring the pressure back up and will maintain liquid seal in the fuel lines until to shut it down and vapor lock occurs again. I'm betting it cranks over a few times before starting when cold, not a lot, but more than it should. Mine did as pressure built, after replacing the accumulator it fires almost immediately. Check your pressures, it's the most basic thing you NEED to do to insure a proper running car.
__________________
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 02-17-2007, 10:35 PM
  Pelican Parts Technical Article Directory    Reply With Quote #9 (permalink)
930s rule the wasteland
 
h20cooled7's Avatar
 
Join Date: Dec 2006
Location: Spotsylvania ,Virginia
Posts: 1,195
Send a message via AIM to h20cooled7
ahhhhhhh , ok makes sense. I'll pick up a fuel filter too and replace too while im in there. 1 more thing when you replace the valve on the pump is it on the 1 in front or the 1 in the rear? this is all good stuff and really appreciate the info
Pete
__________________
1980 930 Turbo
1993 Corrado
1983 944
1984 944
2001 VW golf TDI
Old 02-18-2007, 04:43 AM
  Pelican Parts Technical Article Directory    Reply With Quote #10 (permalink)
Moderator
 
Porschephd's Avatar
 
Join Date: Aug 2002
Location: OverlandPark KS (Kansas City)
Posts: 521
Nope, just one in the front. That is it.
__________________
Stephen
94 3.6Turbo 6-speed AWD
Old 02-18-2007, 06:24 AM
  Pelican Parts Technical Article Directory    Reply With Quote #11 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 10:57 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2016 Pelican Parts - 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.