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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
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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....
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Mike² 1985 M491 |
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
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Anyone?
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Mike² 1985 M491 |
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Registered
Join Date: Dec 1999
Location: Novato, CA
Posts: 4,740
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Has your CHT sensor been updated?
Joe |
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
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No, CHT original.
Joe, Thanks for the response
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Mike² 1985 M491 |
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timeless beauty
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
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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?
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Bob 87 targa |
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timeless beauty
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
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Bob 87 targa |
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timeless beauty
Join Date: Oct 2004
Location: Cape Cod
Posts: 660
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Bob 87 targa |
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Registered
Join Date: Jun 2002
Posts: 893
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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. |
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Registered
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O2 sensor!!
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1972 Porsche 914 Project 2000 BMW M5 1973 Aermacchi 350 |
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
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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.
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Mike² 1985 M491 Last edited by NY65912; 10-02-2005 at 05:13 PM.. |
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Slippery Slope Victim
Join Date: Oct 2001
Location: Brooklyn, NY USA
Posts: 4,391
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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......... ![]()
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Mike² 1985 M491 |
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