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 911 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Slippery Slope Victim
 
NY65912's Avatar
 
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
Failed Emissions....AFM????

Hey guys, took my baby in for the annual vehicle inspection here in NY State. Stock chip, new cat and still CO was WAY TOO HIGH, like off the chart high.

My wrench performed a minor miracle and I am on the road again. Wrench says that no matter how much he fudged with the screw on the Air Fuel Meter he could never get it within limits, he suggests that the AFM is bad, or possibly the DME is damaged.

The car runs RICH, but very strong and smooth and I get good mileage.

Any suggestions? Should I just change out the AFM and if so are any adjustments needed out of the box?

I'm baffled....sometimes I wish I had carbs....I need to go back to school for this fuel injection stuff.

Thanks in advance....

__________________
Mike²

1985 M491
Old 09-26-2005, 01:20 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Slippery Slope Victim
 
NY65912's Avatar
 
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
Anyone?
__________________
Mike²

1985 M491
Old 09-27-2005, 02:17 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered
 
Join Date: Dec 1999
Location: Novato, CA
Posts: 4,740
Has your CHT sensor been updated?

Joe
Old 09-27-2005, 01:45 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Slippery Slope Victim
 
NY65912's Avatar
 
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
No, CHT original.

Joe, Thanks for the response
__________________
Mike²

1985 M491
Old 09-27-2005, 05:57 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
timeless beauty
 
rcaradimos's Avatar
 
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
Hey Mike, regards from the Cape. Did you switch the CHT sensor yet? There is a good post on it http://forums.pelicanparts.com/show...sor+replacement
Hey you have any of those engine compartment clips left?
__________________
Bob

87 targa
Old 10-02-2005, 02:04 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
timeless beauty
 
rcaradimos's Avatar
 
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
http://www.pelicanparts.com/techarticles/911_cyl_head_temp_sensor/911_cyl_head_temp_sensor.htm
__________________
Bob

87 targa
Old 10-02-2005, 02:09 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
timeless beauty
 
rcaradimos's Avatar
 
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
Head Temperature Sensor Replacement
__________________
Bob

87 targa
Old 10-02-2005, 02:20 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered
 
Join Date: Jun 2002
Posts: 893
emission

Can you post your results and maybe we can pinpoint the problem without you spending money. You say that "CO is
way too high " but you say it runs RICH.
Old 10-02-2005, 02:51 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered
 
avendlerdp's Avatar
 
Join Date: Aug 2000
Location: Glendale, Ca. USA
Posts: 756
Garage
O2 sensor!!
__________________
1972 Porsche 914 Project
2000 BMW M5
1973 Aermacchi 350
Old 10-02-2005, 03:33 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Slippery Slope Victim
 
NY65912's Avatar
 
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
Avendlerdp...........Nix on the O² sensor......new.

Jess p.......Not to sound too dumb.....maybe it's HC's that are way high?

rcaradimos........Yep, Ive got a few clips in an envelope for you since the get together, but lost your card with your telephone #. My wife and I will be on the Cape in a few weeks for some R&R with the P-car. PM me with the info and I will mail right away.
Thanks for the links....I have little luck with searches, I guess I do not go deep enough.

I'm changing out the CHT in the next few days...hopefully this will help.

Regards to all.
__________________
Mike²

1985 M491

Last edited by NY65912; 10-02-2005 at 05:13 PM..
Old 10-02-2005, 05:10 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Slippery Slope Victim
 
NY65912's Avatar
 
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
QUOTE]Originally posted by NY65912


Completed the CHT install last evening. Car started right up and seemed to be smoother right out of the box.

After she got warm via some rigorous driving the exhaust smelled less rich for sure and car was smooth throughout rpm range with no hesitation.

The new CHT was 14mm as opposed to the original single wire unit. I had a DME connector with 2 wires alrerady so the new CHT connected right up.

I used plenty of lube on the grommets and they went in quick.

This is a definite DIY job and one that should be done if your over the 65k mark to be sure.

We shall see what the exhaust gas analyzer says, but I believe it to be sucessfull in lowering emissions.

I bought a cheap 14mm ¼" dr socket from Autozone and sliced out a section of the side with a Dremmel for installation....worked great. I also found a really good sparkplug socket tool with a t handle for $4.00 that is just right for a 911 engine. I'll post a pic later.

Best regards.........
[/QUOTE]

__________________
Mike²

1985 M491
Old 10-04-2005, 04:33 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Reply


 


All times are GMT -8. The time now is 09:37 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 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.