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I can hit 26 MPG, in my Fiesta, within a mile of a dead cold start and then a climb up a 10 foot rise from my garage to the street. I could probably beat 26 in a VX with a 2 mile, each way commute.
Smells rich=too much fuel. focus on the pressure regulator and the 02 sensor, see if you can get rid of the smell. Clamp off the fuel supply hose with needle nose pliers to make it go lean and see what that does. Pull a vac on the fuel pressure regulator and see if it is leaking gas into your vacuum souce (bad regulator diaphragm, leaking fuel into the manifold through the vac hose).
Check compression and cam timing.
regards
Mech
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