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Registered User
Join Date: Feb 2014
Posts: 73
fuel pump relay

jumped relay with y jumper fuel pump works put in new relay the question is does fuel pump only run when starting.also put new ign switch in how should I check for spark and fue lthanks bob

Old 04-16-2014, 03:11 PM
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Join Date: May 2008
Location: Harford Co, MD
Posts: 1,469
You can buy a spark tester at your local FLAPS, or do the more shadetree version and take the spark plug out, plug it back into the boot, and ground it against the head and crank the engine. If you do this, MAKE SURE TO DISABLE THE FUEL PUMP. Or have a fire extinguisher handy.

Or just buy the tester. They're cheap.
Current: Pair of 1986 944's
Past: 996 C4S
Old 04-17-2014, 10:28 AM
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Porsche 944S Club Sport
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Join Date: Jul 2009
Location: NYC-Long Island, NY-USA
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That's good it works. Yes it will run when engine is cranking and running as well. recommend Clark's Garage test procedures which are straight forward.

Clark's Garage Shop Manual Index

Keep us posted, later...

2006 955 Cayenne S Titanium Series - Marine Blue, 1987 Porsche 944S Club Sport.
1987 Buick Turbo-T Lightweight "Great White", +500HP, TA49 Turbo., 944/951/968 & 911 Performance Solutions.
Thank you Lord, for your Loving Kindness, Tender Mercy, and Grace. Only You are Faithful.
Old 04-17-2014, 10:31 AM
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