RE: mysterious fuel problems

[dlawson@ball.com (Dave Lawson)]

Dan,
>I still have a couple of problems:
>
>- - gas milage is horrible, 19.5mpg on a long trip, worse if it snows.
>  A guy with an 85 gets 27-28.  We've got oxygenated gas now
>  but it should be better than this.
>
>- - if I drive fast (like on the parkway) then stop (exit ramp),
>   I can smell fuel when I stop and as I take off again.  Not
>  an overpowering smell, but noticable.
>
>And sometimes:
>
>- - car seems to stumble at 3000-3500 rpm cruising in 5th gear.  If
>  I downshift to 4th and floor it, go back to 5th, it's gone.
>  But this is intermittent.

For the fuel smell, check the gasket for the fuel tank sender in the
gas tank. With a full tank and some lateral movement, I was getting
some gas leaking from this gasket on the TQC. I haven' replaced it
yet, but it's on the list.

For the general fuel problems how about the following:
 -a new O2 sensor
 -have you checked the O2 freq valve duty cycle with your sunpro
 -are all the system pressures correct
 -is the cold start injector functioning correctly, i.e. like turning off
 -is the air plate position set correctly
 -have you put in all new vacum lines, i.e. no vacum  leaks

Some starting points..
 -
Dave Lawson  dlawson@ball.com