Notices
993 Turbo Forum 1995-1998

Help missfire

Thread Tools
 
Search this Thread
 
Old May 11, 2015 | 10:27 AM
  #1  
ian 993gt2's Avatar
ian 993gt2
Thread Starter
Rennlist Member
 
Joined: Mar 2011
Posts: 139
Likes: 0
From: spain
Default Help missfire

Car will run fine for about a 45 seconds when cold then starts to missfire real bad but after 5 mins will run ok turbo gauge read .2 at tick over when misfiring but works fine when misfire stops. Cel on and sometimes flashing
Faults codes are as follows
Multiple misfire
Misfire 1/3/5/6/4
And this little beauty. P1585 missfire low fuel in tank , or something like that, I can't remember the actual verbiage
Any ideas???

Ian
Reply
Old May 11, 2015 | 10:49 AM
  #2  
Quadcammer's Avatar
Quadcammer
Race Director
15 Year Member
 
Joined: Nov 2006
Posts: 15,860
Likes: 1,629
From: Clifton, NJ
Default

I'm assuming you've looked at the typical suspects like distributor cap, loose wires, funky coil connection, clogged fuel filter, etc.
Reply
Old May 11, 2015 | 11:06 AM
  #3  
ian 993gt2's Avatar
ian 993gt2
Thread Starter
Rennlist Member
 
Joined: Mar 2011
Posts: 139
Likes: 0
From: spain
Default

Yep to the above Checked everything that is obvious but trying to find out what p1585 is the porsche description is a bit silly. ( missfire. with no fuel in the tank)
Reply
Old May 11, 2015 | 11:08 AM
  #4  
ian 993gt2's Avatar
ian 993gt2
Thread Starter
Rennlist Member
 
Joined: Mar 2011
Posts: 139
Likes: 0
From: spain
Default

Once the car has had its little tantrum after about 5 mins runs perfect
Reply
Old May 11, 2015 | 02:09 PM
  #5  
OverBoosted28's Avatar
OverBoosted28
Rennlist Member
 
Joined: Nov 2010
Posts: 3,484
Likes: 20
From: Central California
Default

CEL flashing means to stop car immediately! Since you've checked ignition system, next is (and obvious with code) fuel. Fuel filter, fuel pump, injector health. So only cylinder 2 is not misfiring? Change fuel filter first if it hasn't been done in a while. Assure you have good gas and ONLY good gas. Then check pressure at rail. I would not drive it. Multiple, continuous misfires can do some damage. After you have resolved fuel issue, then replace plugs, dist/rotor caps. They'll take a beating from continuous misfires.
Looked at that code and it also involves "vehicle idle control", so make sure your IAC valve is clean also. Maybe do that first, since it's easiest to attack, then fuel filter if it's been in there a long time.
Reply
Old May 11, 2015 | 04:13 PM
  #6  
ian 993gt2's Avatar
ian 993gt2
Thread Starter
Rennlist Member
 
Joined: Mar 2011
Posts: 139
Likes: 0
From: spain
Default

i was thinking O2 sensors eg. After it warms up it sorts itself out but that would give a fault code I think Why would the iac cause a misfire?
Reply
Old May 11, 2015 | 04:15 PM
  #7  
ian 993gt2's Avatar
ian 993gt2
Thread Starter
Rennlist Member
 
Joined: Mar 2011
Posts: 139
Likes: 0
From: spain
Default

Where did you find info on p1585 I looked all over the Internet and found nothing useful

Last edited by ian 993gt2; May 11, 2015 at 04:15 PM. Reason: Spelling
Reply
Old May 11, 2015 | 10:41 PM
  #8  
OverBoosted28's Avatar
OverBoosted28
Rennlist Member
 
Joined: Nov 2010
Posts: 3,484
Likes: 20
From: Central California
Default

Googled itimage.jpg
Reply
Rennlist Stories

The Best Porsche Posts for Porsche Enthusiasts

story-0

9 Vehicles Porsche Helped Engineer that Aren't Porsches

 Verdad Gallardo
story-1

9 Features and Characteristics That Only Porsche People Understand

 Verdad Gallardo
story-2

I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way

 Joe Kucinski
story-3

10 Most Unnecessary Porsches Ever Built (And Why We Love Them)

 Verdad Gallardo
story-4

Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner

 Joe Kucinski
story-5

This Builder Is Turning Heads With Its Slantnose 911 Creation

 Verdad Gallardo
story-6

Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

 Verdad Gallardo
story-7

Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

 Verdad Gallardo
story-8

10 Porsche Colors That Have More Personality Than Most People

 Verdad Gallardo
story-9

Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

 Verdad Gallardo
Old May 11, 2015 | 10:42 PM
  #9  
OverBoosted28's Avatar
OverBoosted28
Rennlist Member
 
Joined: Nov 2010
Posts: 3,484
Likes: 20
From: Central California
Default

image.jpg
Reply




All times are GMT -3. The time now is 05:32 PM.

story-0
9 Vehicles Porsche Helped Engineer that Aren't Porsches

Slideshow: Long before engineering consulting became trendy, Porsche was quietly helping other automakers build everything from supercars to economy hatchbacks.

By Verdad Gallardo | 2026-05-15 12:44:44


VIEW MORE
story-1
9 Features and Characteristics That Only Porsche People Understand

Slideshow: Some brands build cars. Porsche builds traditions, obsessions, and a few habits that stopped making sense decades ago but somehow became part of the charm.

By Verdad Gallardo | 2026-05-13 18:46:13


VIEW MORE
story-2
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way

Slideshow: Six years and 500 Rennlist articles later, these are the biggest changes at Porsche.

By Joe Kucinski | 2026-05-11 09:52:55


VIEW MORE
story-3
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)

Slideshow: Some Porsches exist for very specific reasons-others feel like they were built just to see if anyone would notice.

By Verdad Gallardo | 2026-05-06 18:00:32


VIEW MORE
story-4
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner

Slideshow: Choosing between the 911 GT3 S/C and 718 Spyder RS in 10 key categories to determine one surprising winner.

By Joe Kucinski | 2026-05-05 12:51:46


VIEW MORE
story-5
This Builder Is Turning Heads With Its Slantnose 911 Creation

Slideshow: A small Polish tuner has reimagined the Porsche 911 Slantnose for the modern era, blending 1980s nostalgia with widebody tuning culture and serious performance upgrades.

By Verdad Gallardo | 2026-05-01 10:49:43


VIEW MORE
story-6
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

Slideshow: Porsche has created a Japan-only 911 GT3 Artisan Edition that blends track-ready hardware with design cues inspired by traditional Japanese craftsmanship.

By Verdad Gallardo | 2026-04-28 19:37:40


VIEW MORE
story-7
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

Slideshow: Porsche's latest electric Cayenne Coupe blends dramatic styling with supercar acceleration, turning the brand's midsize SUV into a 1,139-horsepower flagship.

By Verdad Gallardo | 2026-04-27 19:39:30


VIEW MORE
story-8
10 Porsche Colors That Have More Personality Than Most People

Slideshow: Porsche's wildest paint colors aren't just shades-they're full-blown personalities on four wheels.

By Verdad Gallardo | 2026-04-27 19:38:13


VIEW MORE
story-9
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

Slideshow: The last of the Speedsters doesn't just close a chapter, it makes quite the bold, air-cooled statement.

By Verdad Gallardo | 2026-04-22 17:55:04


VIEW MORE