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 

HELP NEEDED: Hesitation and Stall problem suddenly appears 900

posted by  ian f. on  Wed Jun 2 06:20 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sun Jan 30 15:23 CST 2011
[RELATED]

I have a problem with my '93 940 turbo. This started out of the blue with no warning.

When I depress the gas, the car hesitates severely, backfires a few times and if I keep pressing the gas, will stall. If I back off the gas I can usually accelerate very slowly and once I get up to speed it is ok. When this is happening the idle goes up to 1300 instead of the normal 750.

I get codes 1-2-1 (Faulty signal to/from Air Mass Meter), 3-2-2 (Air Mass Meter wire burn-off signal absent or faulty) and 2-3-1 (Fuel trim (lambda control) too lean or too rich at part load).

I recently replaced the spark plugs, wires, ignition coil wire, distributor cap and rotor, cleaned throttle body, cleared blocked vacuum hoses and flame trap holder (turbo engine).

I have verified that no vacuum hoses are loose or leaking. The plugs are all correctly torqued and the wires are on tight. Bosch cap and rotor. Ignition coil wire on tight.

When I disconnect the AMM and restart I get the same symptoms. When I disconnect the O2 sensor I get the same symptoms. When I disconnect the Throttle Position Sensor I get the same symptoms.

I have looked over the FAQ, but no solutions are staring me back in the face.

Any ideas?

My thoughts are maybe AMM. You hear a lot of different opinions on how often AMMs go bad.

TPS? from the throttle body cleaning.

Fuel Filter. Last change not known.

If anyone is familiar with this problem I would eagerly anticipate hearing your thoughts and ideas.

Thanks a million,
Ian





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.