Fuel pump problems
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New User
Joined: Apr 2004
Posts: 5
Likes: 0
Fuel pump problems
Hey guy's, I was wondering if anybody was running a Holley Blue electric fuel pump on their truck. I just rebuilt a 429 thunderjet and got the engine put back in the truck about a week ago. (it's a '71 F100 by the way) I put a carter mechanical fuel pump on it, and it started, however, the fuel pressure would fall and the engine would die. This happened about three times. The engine ran for a total of about three minutes. After troubleshooting the fuel system, I found that the fuel pump eccentric on the end of the camshaft has become loose. I can put a screwdriver in the timing cover where the fuel pump arm goes, and I can move the eccentric back and forth because of the loose bolt. I guess it became loose because I didn't put thread lock on the bolt. Anyway, I'm pissed because I have to take the whole front part of the engine apart again to get to the eccentric. I want to just remove the bolt and eccentric completely from the camshaft and install a fuel pump block-off plate, then put a Holley Blue electric fuel pump on. I need to know if these pumps work with the old style gas tanks. (Mine is the kind mounted behind the driver seat). If you guys are using them or know someone who is, Please let me know before I buy one and try to install it. Thank you
More Turbo
Joined: Apr 2004
Posts: 736
Likes: 3
From: South East, Michigan
When you remove the fuel pump eccentric you'll have to put the bolt back in , it's what holds your timing gear on the camshaft. You'll want to use blue lock tite this time too. The fuel pump should work with any fuel tank, I'm not sure what your question is here. -Ed
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
If you have to pull the timing cover to retighten the bolt anyway, why would you the spend money for an electric fuel pump you don't need. Just pull the cover, loctite the bolt with the eccentric still on and use the mechanical pump. I used the blue pump on my race boat for years, but had to run the pressure regulator or all six carbs would flood over. Not worth the hassle if you have a mechanical that will do the job.
Elder User
Joined: May 2004
Posts: 565
Likes: 3
From: saxton pa.
Cam Bolt
You need to get that cam bolt @ eccentric tightened up @ locktighted, if you keep running that engine that way you will end up with a cam thats trying to wind itself out of the back of the block! I don't see the need for a electric fuel pump unless you are in a racing situation . A stock fuel pump will supply all the fuel you need!!
Have a good day HOTWRENCH
Have a good day HOTWRENCH
