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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Runs smooth but gets poor gas mileage. what gives? 200 1991

posted by  weather on  Mon Apr 21 09:30 CST 2008
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Oct 26 23:16 CST 2012
[RELATED]

situation: '91 245 LH 2.4, AMM is a 016, ECU is a pink label (gasp!) 561. supposedly 115k on the clock, although i take this number with reservation.

it runs pretty nicely. starts right up in cold weather. idles smoothly right around 750rpm. however, throttle response is slow, and the gas mileage is bad: ~15mpg locally with lots of stops, and ~20 on highways at ~70mph. i don't see any soot or black smoke coming from the exhaust, though.

here's what has already been done that might relate to this issue:
the usual tune up: belts, fluids, plugs, cap, rotor.
o2 sensor
FPR
valve adjustment
kickdown cable
new cat-back

any idea what it might be? i'm planning on checking the vacuum thoroughly and test the engine coolant sensor. maybe clean a ground or two.

oh, at idle i can feel individual bursts from the exhaust tail pipe. can i rule out the cat being plugged?

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.