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timmy2 timmy2 is online now
ROW '78 911 Targa
 
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Join Date: Jul 2011
Location: Salem, OR
Posts: 10,217
Garage
For your carburated system:
Blow a little air through the return line and listen for bubbles to confirm it is at least partially clear.
Put your gauge in line with the return circuit run the pump, close the gauge valve and see if the pressure goes to 3.5 psi. Then open the gauge valve and see if the pressure drops.
Which pump did you end up keeping on the car?

Your troubles almost sound like points are carboned up or timing is off. Fouled or wet plugs?
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Dennis
Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C
Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds.

Last edited by timmy2; 09-09-2012 at 09:49 PM..
Old 09-09-2012, 09:41 PM
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