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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

740 turbo ignition advance relay- does it exist? 700

posted by  clete on  Mon Jul 4 15:32 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Mar 14 11:57 CST 2012
[RELATED]

The following relates to my July 2 post and is offered in hope of getting to the root of my problem = poor running when ignition advance is increased on closure of the radiator coolant temp sensor (which also activates the electric cooling fan). My Volvo shop manuals are confusing (at least to me). There are several references to an " ignition advance relay " triggered by the radiator coolant temp sensor. In one case it suggests that this applies to the B230T engine but in another manual it mentions only the B28 engine. Since I cannot find this relay in the location shown on the diagram (next to the main fuse/relay assembly), I'm now assuming that I don't have one (unless hidden elsewhere). So HELP :
1 - Does a 1986 740 Turbo have an "ignition advance relay" ?
2 - If it does, where is it?
3 - If it does not, by what means is the ignition advanced when the coolant sensor switch closes? ( I know that this happens via a timing light)
4 - Does anyone know how to disable the ignition advance but still allow the electric fan to operate ? ( I believe this will get me out of trouble without getting to the root of my problem)

If anyone has experienced a similar problem when the fan and ignition advance kicks in (rough idle and 2-4 second lag accelerating from stop), I would appreciate hearing from you.
THANKS






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.