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 

How to test rpm sensor? 700 1990

posted by  Piper109 on  Sun May 11 06:37 CST 2008
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Aug 1 19:15 CST 2011
[RELATED]

I have just bought a non running '90 740 wagon. I dont have it home yet and I will have to tow it 230 miles.

It has a history of sometimes starting but when shut down will not restart for a day or so. The owners have given up on it.

I have read in the FAQ the 3 most likely culprits being the fuel pump relay.
RPM sensor on the flywhee and the Radio suppression relay.

I figure I can eventually find a way to hot wire the relays temporarily to eliminate them as causes but is there a way to test the RPM sensor to know whether or not it is bad. Does it fail open circuit? Does if fail short circuit?

If I put a meter on it on the ac voltage scale and crank the engine over am I likely to be able to tell?

I think it has Regina ignition as it has quite a big black box on the drivers side wheel well.

This is my first gas engined Volvo and it seems in good enough condition to make it run, with about 160k on the clock.

Thanks for any help and advice.

Steve






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.