[T3] MPGs??

[Dennis Stiefel]

Sent from my iPad

> On Aug 30, 2014, at 1:58 PM, "Jim Adney" <jadney at vwtype3.org> wrote:
> 
>> On 30 Aug 2014 at 13:00, Dennis Stiefel wrote:
>> 
>> Well this time I cut my speed average on the interstate down to 60 on
>> the interstate and 50 around town and got a disappointing 20 mpg. I
>> was doing better when I kept her around 70 where she seems like where
>> she wants to run on the freeway.
> 
> Yeah, you've still got something wrong. Your '72 should do much 
> better than that. There's absolutely NO way you should be getting 
> better mileage at 70 than at 50, unless something is making the 
> system WAY over-rich at 50.
> 
> Things to check:
> 
> Fuel pressure 30 psi, as you suggested
> 
> Disconnect the cold start valve.
> 
> Special '72-only timing, making sure both vacuum advance AND vacuum 
> retard are working. Only the Bentley gets this timing proceedure 
> right! Don't do it any other way!
> 
> Make sure the mech adv is working. Check this both statically (twist 
> the rotor) and dynamically (watch with a timing light.) 
> 
> Make sure the thermostat and linkage is working, opening AND closing.
> 
> Make sure the pressure sensor vacuum hose is connected at BOTH ends. 
> Make sure you have the right pressure sensor. The '72-3 pressure 
> sensors should have a large black plastic cap over the end.
> 
> If those things all check out, it might be worthwhile to check the 
> continuity of the wiring to and from each of your temp sensors. 
> You'll have to take the brain out to do this correctly thru the FI 
> wiring harness, so check to make sure you have an E brain while 
> you're there.
> 
> Other than that, make sure your brakes aren't dragging and that 
> you're not driving with one foot on the brakes.  ;-p
> 
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
> 
> _______________________________________________
Yes the fuel pressure will be the first thing.  The cold start dose not have anything connected to it as fare as fuel lines or wires because we never hooked it up. I was told it rarely gets cold enough here in bama to need it. On the timing I guess you forgot that my distributor was too far gone to rebuild way back when I sent it to you so you sold me one from a 73. I do the same thing as far as getting all the cars work on mixed up or just forget about what we work on at the school or before I started teaching. Rechecking the timing was another thing I was going to do.  I think the pressure or map sensor is ok and it has the black cap on it but I'll check that too. The brakes seem ok as good as she runs and as much of power as she has hard to believe the brakes are dragging.  However since my class is going over brakes now we could put her on a lift and let the boys look that over. 

Dennis