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



 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Cam Positioning Sensor? 850 1993

posted by  Rule 308 on  Tue May 3 13:50 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Tue May 8 09:20 CST 2012
[RELATED]

Yes,there will be no spark at the plugs. The CMP is a reference sensor that the ECU uses to tell when the cylinder is on compression as opposed to exhaust stroke. With the vehicle running you can unplug the sensor and it will log a code but keep on running. This is because once the engine is up and running and has seen the CMP signal it "knows" where it is at and should it loose the signal it is no big deal as it is counting the cycles anyhow so it just runs on a substitute value. It really is not a big deal unless you have a car variable valve timing. Now if you unplug it while the car is not running and try to start it, it will not start because it has no idea which TDC is the correct TDC. Does that answer your question?

Mark






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.