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jjcollier jjcollier is offline
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Join Date: Nov 2004
Location: Boulder, CO
Posts: 151
So close but no buzz (electrical experts needed!)

Hope I'm not abusing the system here by essentially reposting, but I've been able to rule out a bunch of potential no-start issues and frankly I'M JONESING TO DRIVE!!!

Here's what I've got(BTW, it's a euro '79SC with CIS):
-Spark (nice and blue on fresh plugs)
-Gas in the gas tank
-No requisite fuel filter buzz just prior to start up.
-Fuel at the (new) fuel filter (checked by loosening the lower attachment and noting seapage)
-The smell of fuel in the engine compartment, but dry injectors after multiple attempts to start
-Power at the fuel filter during turn over, but no vibration/pumping. (checked with volt meter) Yes I've tried tapping it too.
-I assume a good red fuel pump relay (I've tried switching others out)
-New fuse at #16 (and I've tried switching it out with another 25 amp fuse and cleaning the connection area)
-I have tried disconnecting the safety switch in back. No change.

Based on the above, I believe that my fuel pump has died. However, we did have it pulled a few nights ago and it ran when disconnected from the fuel lines (note sure how/why it worked then as the absence of the buzz was the first thing I noticed when trying to restart the car after it first died a week ago). Once reconnected, it would not pump during start up or when tested using the key on run/lift the sensor plate method. I have been back down there to clean the terminals and double check connections. All seem to be fine.

I have checked the relay connections with a volt meter and get a reading at 86/87, 86/30, etc., but NOT when checking 86/87a.

What else could be the issue here?
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1979 911SC
1978 911SC Euro
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Last edited by jjcollier; 07-15-2005 at 10:22 PM..
Old 07-15-2005, 10:11 PM
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