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jwasbury jwasbury is offline
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Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,384
Get out your multimeter dude...

start following the 12v to your pumps. That red relay in the engine compartment must be your overboost relay. My '79 is like that too. I think it was not until the later cars that they used the "special" yellow relay. I agree to check your overboost sensor too. Make sure its connected. You upgraded the intercooler too right? If the overboost sensor has been moved from the factory bypass/recirc valve to the I/C, you may need to add a ground wire from the I/C to the engine somewhere. The overboost sensor grounds through the hole it screws into and inf the I/C is electrically isolated from the ground, your overboost sensor wont ground and pumps won't run.
Current: 1983 911 GT4 Race Car / 1999 Spec Miata / 2000 MB SL500 / 1998 MB E300TD / 1998 BMW R1100RT / 2016 KTM Duke 690
Past: 2009 997 Turbo Cab / 1979 930
Old 03-19-2010, 08:16 AM
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