940 Turbo Gas Mileage - Air Cleaner Case - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > PAG Vehicle Discussion > Volvo
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 08-23-2005, 23:01   #1 (permalink)
thunderbeast
Guest
 
Posts: n/a
940 Turbo Gas Mileage - Air Cleaner Case

I wrote several months ago about the miserable gas mileage I get from my
1994 940T (automatic) Wagon. I still get about 14-16 Miles per Gallon in
the city and up to 22 MPG on the highway. This is far below expectations,
and feedback from the group suggested that something was amiss - probably
vacuum or turbo hose. The Volvo specialist that has worked on the car for
years shrugged his shoulders and told me that "it is what it is - There are
no adjustments - If there was a vacuum leak, the CHECK ENGINE light would be
on.

The Volvo dealer told me to go find the highest price premium gasoline I
could buy and use it. Premium gas did get me about 2 MPG, but it still
seemed way too low.

Tonight I discovered that the plastic case that holds the air filter has not
been properly closing. A previous owner (or mechanic) had broken off the
clamps that hold the two pieces together. Instead of the clamps, sheet
metal screws were used to hold the two pieces together at the four corners.
One of the screws had stripped out of the plastic below, and the tension
from the air filter gasket had opened a seam between the two pieces letting
in large volumes of outside air.

My new theory is that this outside air is not welcome, and that the O2
sensor is getting a false reading - telling the fuel injection system to
keep adding gas to the "lean" air mixture it sees created by the breach.

I have re-sealed the box (using a new screw) and will now run a tank of gas
through to see if there is an appreciable difference.

Am I dreaming or does this make sense?

Dave in Oregon


  Reply With Quote
Sponsored Links
Advertisement
 
Old 08-24-2005, 01:01   #2 (permalink)
James Sweet
Guest
 
Posts: n/a
Re: 940 Turbo Gas Mileage - Air Cleaner Case


"thunderbeast" <davidkaplan@yahoo.com> wrote in message
news:11gnrt2npu9oq4c@corp.supernews.com...
> I wrote several months ago about the miserable gas mileage I get from my
> 1994 940T (automatic) Wagon. I still get about 14-16 Miles per Gallon in
> the city and up to 22 MPG on the highway. This is far below expectations,
> and feedback from the group suggested that something was amiss - probably
> vacuum or turbo hose. The Volvo specialist that has worked on the car for
> years shrugged his shoulders and told me that "it is what it is - There

are
> no adjustments - If there was a vacuum leak, the CHECK ENGINE light would

be
> on.
>
> The Volvo dealer told me to go find the highest price premium gasoline I
> could buy and use it. Premium gas did get me about 2 MPG, but it still
> seemed way too low.
>
> Tonight I discovered that the plastic case that holds the air filter has

not
> been properly closing. A previous owner (or mechanic) had broken off the
> clamps that hold the two pieces together. Instead of the clamps, sheet
> metal screws were used to hold the two pieces together at the four

corners.
> One of the screws had stripped out of the plastic below, and the tension
> from the air filter gasket had opened a seam between the two pieces

letting
> in large volumes of outside air.
>
> My new theory is that this outside air is not welcome, and that the O2
> sensor is getting a false reading - telling the fuel injection system to
> keep adding gas to the "lean" air mixture it sees created by the breach.
>
> I have re-sealed the box (using a new screw) and will now run a tank of

gas
> through to see if there is an appreciable difference.
>
> Am I dreaming or does this make sense?
>
> Dave in Oregon
>
>


The airflow sensor is after the airbox so the leak shouldn't effect fuel
economy, it's certainly not good for the engine to be breathing in all that
unfiltered air though.

How's the tire pressure? That can make a big difference, it's also worth
checking the plugs, cap, rotor, wires, and timing. I would expect closer to
25 mpg on the highway, I find the best fuel economy comes with midgrade
fuel, premium gives just a tad more pep in hot weather but slightly lower
economy.


  Reply With Quote
Old 08-24-2005, 17:01   #3 (permalink)
David Kaplan
Guest
 
Posts: n/a
940 Turbo Gas Mileage - I'm done! This PIG is FOR SALE!

Just got it back from my regular mechanic. He agrees with the other
mechanics: It is what it is. Having checked out the vacuum lines, O2
sesnor, and computer diagnostics, he could offer no further help.


Too bad! I thought I had a nice car that could be the family campmobile and
get decent gas mileage. It just seems odd that a four cyl 2 litre automobile
uses 40% more gas than a full-sized chrysler minivan with a 3.3 litre engine
(I used to get 28 mpg at 80 miles per hour in the old Grand Caravan that I
replaced). To me, however, if the Volvo wagon gets the same mileage as a
HUMVEE, I may as well have the room. I didn't buy it for speed, but I guess
that is how it was optimized at design.

I am terribly dissapointed. I am just happy that I didn't invest $35K for a
new one.

THIS PIG IS FOR SALE!

Dave

This car is going on the market
"thunderbeast" <davidkaplan@yahoo.com> wrote in message
news:11gnrt2npu9oq4c@corp.supernews.com...
> I wrote several months ago about the miserable gas mileage I get from my
> 1994 940T (automatic) Wagon. I still get about 14-16 Miles per Gallon in
> the city and up to 22 MPG on the highway. This is far below expectations,
> and feedback from the group suggested that something was amiss - probably
> vacuum or turbo hose. The Volvo specialist that has worked on the car for
> years shrugged his shoulders and told me that "it is what it is - There

are
> no adjustments - If there was a vacuum leak, the CHECK ENGINE light would

be
> on.
>
> The Volvo dealer told me to go find the highest price premium gasoline I
> could buy and use it. Premium gas did get me about 2 MPG, but it still
> seemed way too low.
>
> Tonight I discovered that the plastic case that holds the air filter has

not
> been properly closing. A previous owner (or mechanic) had broken off the
> clamps that hold the two pieces together. Instead of the clamps, sheet
> metal screws were used to hold the two pieces together at the four

corners.
> One of the screws had stripped out of the plastic below, and the tension
> from the air filter gasket had opened a seam between the two pieces

letting
> in large volumes of outside air.
>
> My new theory is that this outside air is not welcome, and that the O2
> sensor is getting a false reading - telling the fuel injection system to
> keep adding gas to the "lean" air mixture it sees created by the breach.
>
> I have re-sealed the box (using a new screw) and will now run a tank of

gas
> through to see if there is an appreciable difference.
>
> Am I dreaming or does this make sense?
>
> Dave in Oregon
>
>



  Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Cars and PAG Vehicles > PAG Vehicle Discussion > Volvo



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 07:54.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.