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05-15-2007, 07:48 AM
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Beam Me Up Scottie
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Join Date: Aug 2004
Location: Squantum (part of Quincy),
MA
Cobra Make, Engine: SPF1049 Titanium w/black stripes, 351W with Trick Flow Heads, Tremec 3550
Posts: 7,592
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Not Ranked
My high volume mechanical fuel pump works great, and there is NO switch to forget.
__________________
Warren
'Liberals are maggots upon the life of this planet and need to get off at the next rotation.' (Jamo 2008)
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05-15-2007, 07:57 AM
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CC Member
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Join Date: May 2004
Location: Rehoboth Beach,
DE
Cobra Make, Engine: FFR Daytona Coupe done to replicate CSX-2299 at the '64 LeMans
Posts: 641
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Not Ranked
I'm glad you found your problem. I had the same situation happen and it was a bad coil that would shut off whenever it got hot.
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05-15-2007, 07:58 AM
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Canadian Gashole
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Join Date: Mar 1999
Location: Quebec, Canada,
QC
Cobra Make, Engine: Johnex 427 S/C, 351W, 472 HP, 444 lbs. torque
Posts: 2,455
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Not Ranked
I run a mechanical fuel pump but I have been thinking about also installing an electrical one so that the carb bowls are completely full before starting, especially when the car has been sitting for a while. I seem to remember thatmany people have had problems with the Holley electrical fuel pumps.
What type of electrical pump is most reliable?
Wayne
__________________
Don't get caught dead, sitting on your seat belt.
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05-15-2007, 10:16 AM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
Ture007, lack of fuel or extremely low on fuel in the carb causes a lean condition which leads to a backfire on occasion.
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05-15-2007, 10:30 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,597
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Not Ranked
Wayne,
I ran a Holly Blue Electric pump on my Cobra for 10 years and never had any problem. I must have gotten the one good one they made from what everyone else says about them. The coupe has an Aeromotive on it.
Ron  |
05-15-2007, 11:05 AM
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CC Member
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Join Date: May 2004
Location: Palm Coast,
FL
Cobra Make, Engine: Shelby American CSX 4241 - authentically built
Posts: 2,573
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Not Ranked
How did you verify the pump was bad? Only 3-4 psi of pressure will not cause the symptoms you said you had. My own car runs at 3-4 psi on the mechanical pump and 6-7 psi on the electric with no change in how it runs.
Did you ever pull the dist and check the roll pin like I originally suggested?
__________________
Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241
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05-15-2007, 11:23 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
You stated at the beginning your pump pressure was fine.
I hope this works for you.
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05-27-2007, 06:44 PM
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CC Member
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Join Date: Mar 2006
Cobra Make, Engine: Unique FIA 289, 408cu
Posts: 94
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Not Ranked
Thanks everyone for all the help. Turned out to be the magnetic pick-up in the distributor. Working great now!
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05-28-2007, 07:26 AM
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Club Cobra Member
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Join Date: Feb 2003
Location: Sterling,
IL
Cobra Make, Engine: SPF #1507 427 Dart Block Windsor
Posts: 1,192
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Not Ranked
How did you determine it was the pick-up? Seems funny that it would be intermittent.
Good reason to carry an extra, though, and they're cheap.
Thanks,
Lowell
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