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Re: EGR valve, Wont pass Emissions ( says too much NOx) 90 golf GL 8v

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Discuss Re: EGR valve, Wont pass Emissions ( says too much NOx) 90 golf GL 8v in the Volkswagen forum.



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Bob Hetzel
 
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Default Re: EGR valve, Wont pass Emissions ( says too much NOx) 90 golf GL 8v - 07-01-2003 , 03:12 PM






High NO means it's probably running too hot. Ignition timing may be off, but
could also be a variety of more likely things... thermostat failing to open wide,
radiator not cooling properly, water pump not circulating properly, cam timing
off, coolant temp sensor, etc. What were the other test readings?

In article <zOtKa.5286$OE2.625454 (AT) news20 (DOT) bellglobal.com>,
Peter Cressman <cressmanp (AT) sympatico (DOT) ca> wrote:
Quote:
Try retarding your ignition timing and than retake the test. As well, ensure
that you have new spark plugs and air filter, as well as fresh gasoline. Run
the car for a little while at full throttle to get the engine good and hot.

- Peter

"dave" <vwdoc1 (AT) aol (DOT) comANTISPAM> wrote in message
news:20030625230631.21466.00001577 (AT) mb-m20 (DOT) aol.com...
From: totally (AT) xmission (DOT) com (Marc Smith)
Date: 6/25/03 3:27 PM Central Daylight Time
Message-id: <27043eb6.0306251227.6734575f (AT) posting (DOT) google.com

It wouldnt pass the 25mph Test, said too much NOx. The part they said
to replace was the EGR valve, its 300 + dollars at the dealer. Im not
paying tha tmuch for a car I paid 600 for.


Also seems that the hydraulic lifters are noisy as hell sometimes, and
not even a tad noisy. its intermittent. Is there an adjustment?



Hmmm
I have not personally seen a EGR valve on a 90 Golf.
What country did this Golf come from?
Did you take off the EGR valve and make sure it was free and not frozen
due to
carbon build up? Did you check vacuum to the valve also?
Sounds like the engine or the exhaust is running too hot. How is the CO
and
HC?
later,
dave
later,
dave
Reminder........
Before you criticize someone, you should walk a mile in their shoes. That
way,
when you criticize them, you are a mile away from them, and you have their
shoes. Frieda Norris





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