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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Too rich fuel/air with boost controller 700 1986

posted by  someone claiming to be riverol on  Sun Mar 10 02:25 CST 2002 [RELATED]

Please, help. Not long ago, car was running beautifully, smooth and powerful with clean plugs. Then, I put in a Dawes Device boost controller and had clouds of thick black smoke coming out of the exhaust pipe in direct relation to acceleration. Plugs were covered with black velvet like powdery soot. All hoses and most ignition and injection components were new and all checked out for speficied voltage and resistance parameters. O2 sensor, FPR and coil were not new, but still checked out OK. I have now put in new O2 sensor and FPR. Still, I get overly rich fuel/air with Dawes Device boost controller.

(1) What is telling ECU to enrich fuel/air?
(2) Can the cure be raised boost to also raise air/fuel, perhaps checked with air/fuel meter, until plugs burn clean?
(3) Can engine mechanically stand 12 psi of boost, perhaps a bit more, with 150,000 miles in original bottom end, and 60,000 miles in over five years old head and turbo, as long as air/fuel is not too lean?






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.