The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Emission test fail - high NOx. Remedy? 700 1990

posted by  kallsop on  Mon Nov 21 11:16 CST 2011
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat Apr 28 13:44 CST 2012
[RELATED]

1990 740 Turbo Intercooler Wagon, 234K miles.

HC limit 130, measured 101
CO limit 0.70, measured 0.51
Nox limit 1522, measured 2168 <-- FAIL

The car has new plugs, plug wires, air filter, oil and oil filter changed. Had 1/2 can of Seafoam treatment, sucked into the brake booster hose and tons of smoke came out the exhaust. Now what?

I didn't notice until after the test, but what I think is a part of the cruise control system, a rubber boot like vaccuum contraption, has a big hole in it. Would that be enough to cause such a huge NOx exceedance or there are other common sources of this failure for this Volvo? Time to bite the bullet and get a new cat converter?





USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.