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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Help-I'm stumped-fuel relay/ignition circuit - 83 turbo-b21- 200 1983

posted by  SOSguy on  Sat Dec 11 03:33 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

I started with a no start problem. Found no spark and chased down to bad ign module and replaced. Still no start. Chased down to fuel pump relay coil burned out and replaced. Now have start and then die (right away). Checked volts on fuel relay coil and have some spikes 36-50 volts while cranking. Digital meter so not sure if I trust the spikes reading. Unplugged fuel relay and jumpered pump wires direct. Pump runs and engine starts and runs. Plugged relay back in. Starts then dies(right away). While holding relay in my hand and cranking, I can feel relay thumping off and on. This is where I'm at right now. Looking at the wireing diagram, fuel relay and ign module have in common the connection at neg post on the coil. I'm thinking that if my ign coil secondary is shorting into the primary I could get a voltage spike that would burn out both the Ign module and the fuel pump and account for the thumping in the fuel relay per every spark plug fire. Ohm testing the coil shows no defect. However I know the High voltage could possibly jump even if ohm test is good, so I've ordered a new coil to arrive today. Now to the part that stumps me. On the wireing diagram (Haynes manual pg 12-24) it shows what looks like a second coil inside the fuel relay wired to the first one. What is the purpose and function of this second coil and wireing (Terminal 31b)? And could this circuit be causing my fuel relay thump? Any help or suggestions would be appreciated.






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.