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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

740 bosch jetronic starts and then dies 700 1992

posted by  gem56 on  Sun May 8 07:42 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

I have the '92 740 wagon. It starts, runs one or two seconds, then quits. If I give it gas, it will run at higher rpm, but dies when I let off. The IAC tests good, The Mass air meter tests good, but the manifold pressure unit has no voltage on its terminals. The eror code is 1-2-1, and will not reset unless I disconnect the neg battery cable. This is a bosch jetronic 2.4 system. Does anyone know how to properly test the map unit? Mine has two leads plus the one inch hose going to the intake manifold. I disassembled the map sensor, and inside is a small solenoid that looks like a relay. When it closes, it opens one air passage, and plugs up the other one. I can't figure how the peizo signal gets put on the two leads to tell the ecu what is happening. Could my ecu be bad? I don't want just throw parts at it, like they do at the dealer.






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.