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 > Porsche Forums > Porsche 924/944/968 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Jun 2004
Location: NY
Posts: 845
Send a message via AIM to bluebullet
Engine Diesels

I had the car idling for a bit and and I go to shut it off and it died, knocked a few times and shut off. I read in the manual that it says check either that the motor is running hot (which its not) or something with the DEE system. Now what would cause the motor to diesel? Im guessing a bad fuel pump relay the car starts no problem and drives perfectly fine, its just when u shut it off it shakes up a storm cuse the fuel pump isnt quitting. Would bad gas cause it too?
__________________
1985 944 / 2007 335i / 1987 325is / 1985 535i / 1999 528iT / 2006 X5
Old 07-24-2004, 03:09 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
Join Date: Mar 2000
Location: Riverdale, GA
Posts: 363
Send a message via Yahoo to Cebu
Low octane fuel in the tank.
__________________
85.5 944na
Automatic
V-65 Magna
94 Impala SS
Old 07-24-2004, 03:40 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
Join Date: Jun 2004
Location: NY
Posts: 845
Send a message via AIM to bluebullet
bastids....i got bad gas from there before and I didnt even realize it...didnt know it would make that much of a difference...
__________________
1985 944 / 2007 335i / 1987 325is / 1985 535i / 1999 528iT / 2006 X5
Old 07-25-2004, 06:31 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Ornery Bastard
 
Join Date: Sep 2001
Location: Bellevue, WA
Posts: 2,872
All dieseling is, is pre-ignition. If you go to that station again, get premium just to try to make sure that it's not going to be too low of octane.
__________________
Shifting is an art. Learn it, love it, live it.
---------
Silver 1998 Volvo S70 T5 <- Daily (Anja)
Guards Red 1986 951 <- Seattle car (Gretchen)
White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei)
Old 07-25-2004, 08:58 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Burn the fire.
 
Brando's Avatar
 
Join Date: May 2003
Location: Orange County, CA
Posts: 5,998
Garage
i thought the DME would auto-adjust the timing for the low octane stuff. You can run 87 and wont have too many probs. only run 91 from a trusted source, also use some fuel injector cleaner every 6 months.
__________________
[x] Working | [_] Broken: 2017 Victory Octane
[x] Working | [_] Broken: 2005 Ram 1500 SLT w/5.7L Hemi

"Drive it like you stole it."
Old 07-25-2004, 01:37 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
Join Date: Jun 2004
Location: NY
Posts: 845
Send a message via AIM to bluebullet
Yeah I always put 93 in the car (i live in NY), but i got 2 gallons of gas at a different station when i was driving her around and i never had this problem. And what makes me more suspicious of the gas is that my friend went to go fill his truck up with diesel (he has an F-350) and the truck was running like an absolute piece of crap. He drained the tank and sent a sample of it to his buddy who deals with race fuels, and it turns out he had kerosene in it.....apparently they used to store it there, and never bothered to clean the tank out when they switched over....
__________________
1985 944 / 2007 335i / 1987 325is / 1985 535i / 1999 528iT / 2006 X5
Old 07-25-2004, 01:58 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Ornery Bastard
 
Join Date: Sep 2001
Location: Bellevue, WA
Posts: 2,872
Quote:
Originally posted by Brando
i thought the DME would auto-adjust the timing for the low octane stuff. You can run 87 and wont have too many probs. only run 91 from a trusted source, also use some fuel injector cleaner every 6 months.
When the engine is off, the DME can't do anything.

"Dieseling" is when you shut off the ignition (i.e. no more spark) and the engine continues to run (usually very roughly) because the gasoline is self-igniting.

Generally the engine needs to be _really_ hot or the gasoline has to be _really_ bad for that to happen.
__________________
Shifting is an art. Learn it, love it, live it.
---------
Silver 1998 Volvo S70 T5 <- Daily (Anja)
Guards Red 1986 951 <- Seattle car (Gretchen)
White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei)
Old 07-25-2004, 03:34 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
Join Date: Jun 2004
Location: NY
Posts: 845
Send a message via AIM to bluebullet
well im gonna shoot for that it has to be bad gas....because the temp gauge doesnt climb and it doesnt leak antifreeze..and its about as hot under the hood as any other car.

Come to think of it...I should pull the plugs and see what the heck is goin on with them..if hes got those crappy bosch platinums..they could be glowing after i shut the car off and igniting the left over fuel. Or maybe one step too hot....
__________________
1985 944 / 2007 335i / 1987 325is / 1985 535i / 1999 528iT / 2006 X5
Old 07-25-2004, 06:30 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 02:01 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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.