What year is your vehicle?

If you are running a 2.1L WBX, then you may be having a problem with the
O2 sensor, or the Temp II sensor. I recall reading on this list a test
for the O2 sensor voltges using a meter. If they are off, then the ECU
will go to "Rich" for the fuel injection. I don't know where to tell you
to find the info. Maybe another list memmer can. I think the procedure
is posted on a web site somewhere. I think the Temp ll sensor also
affects how rich the mixture is.

One other thing. Set your idle speed correctly. Warm the engine, shut it
off, disconnect the Idle Stabilizer Valve, Start the engine, turn the
big flat common screw by the AFM right or left until the idle is 800-900
rpm, then stop engine and reconnect the ISV. Allow to get cold for a
cold start. Start engine, ISV should kick up rpm to 1000-1200 rpm and
then drop back to 8-900 rpm as engine warms.

Hope this helps just a bit.

Regards,

John Rodgers
88 DL Driver

Ryan Dawson wrote:

>Hi everyone,
>
>Well, I thought that I had made the neccesary repairs and replacements to my
>fuel mileage problem.  Below is a list of the adjustments that I have made:
>
>1. new fuel injectors (manufacturer - Echlin)
>2. new air filter
>3. new spark plugs (platinum)
>4. new oil and filter
>
>There are no leaks in the system, as far as I can tell.  The problem is, I
>installed the spark plugs yesterday evening, and then drove about 5 miles, and
>when I came back I realized that I forgot to check the gap spacing on them.
>So, I took the plugs back out, and they were BLACK again!  I'm going on a
>camping trip today and am hoping to get better fuel mileage than a Hummer!
>Does anyone have any ideas?  Could it be that they are dirty due to the
>previous incomplete combustion?
>
>Any thoughts or theories are welcome!
>
>Thanks in advance,
>Ryan
>
>
>