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Old 07-13-2011, 11:23 AM   #1
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inline fuel pump for 454 chevy

I purchased a used1986 holiday rambler (454 chevy)several years ago. The inline fuel pump has failed three times with only 1200 miles. The pump has one quarter inch inlet and outlet. The fuel line is half inch. Does anyone out there know the proper inline fuel pump for this motor home. thanks
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Old 07-13-2011, 11:37 AM   #2
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any NAPA store should be able to tell you 7Psi is about the limit i think on chevy engine
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Old 07-13-2011, 11:38 AM   #3
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my 1985 is larger 3/8 or maybe bigger mine came ney with a holly red pump (that is what they call them) it lasted 23 years 65,000 miles it started to leak i bought a new one for $130. now this is tied into the oil pressure switch are you sure its the pump or a bad connection. 1/4 in. fitting is wrong need to be at least 3/8 min.
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Old 07-13-2011, 11:42 AM   #4
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The Fuel pump could be a Carter Lift Pump. It is used to prevent vapor lock more then to supply fuel. This is the make pump used on the unit I had with a 454. Got them from an independent parts outlet, NAPA might be a good starting point.
Wish I could give you a part number,hope this puts you in the ballpark.

Dick.
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Old 07-13-2011, 01:02 PM   #5
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My 87 had a factory stock intank pump, Maybe yours has one also and it went south long ago and that is why the cheapo pump in yours now has died...
Your making a pusher pump into a puller with small 1/4 fittings and it ain't going to work period.
The fuel lines are 3/8.

Jim
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Old 07-13-2011, 01:05 PM   #6
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Another do-dad is for you to look on the front passenger side of your engine, Maybe a manual fuel pump is hanging on the engine....

Jim
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Old 07-13-2011, 03:49 PM   #7
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The best place to start with this question is:
Download the Chevrolet Motorhome Service Manual from:
P30 Chevrolet Motorhome Chassis Manual

Then turn to pdf page 139 (Manual page 7-44)
That way you will know what Chevy did for stock setup (in tank fuel pump for 86).
However, even with that said, many manufactures built their house on the previous years chassis therfore it is entirely possible you have the setup based on pdf page 137. I believe those pumps have a higher rating than 5-7lbs which is why there is a pressure regulator in the circuit. In either case, as JimElliot indicated, I believe the 454 carburated version also had a mechanical fuel pump at the engine.

It is not unusual for todays aftermarket fuel pumps to come with 1/4", 5/16", and 3/8" nipples. You select which one you need. The one I just purchased a few weeks ago (5-7 lbs) did at least.

Dave
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Old 07-13-2011, 06:00 PM   #8
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Dave, The mid 80s P-30s were a PITA at times to figure out..
Classic example was the engine belts, On the 87 they had a combo "V" and serp belts but I have NO idea on what year the transition started..

Jim
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Old 07-13-2011, 10:08 PM   #9
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Jim,
There are many possible configurations of the P30 chassis so I can understand what you mean. Even so it helps to have a starting point from which one can work towards a solution. I would think the Chevrolet Service Manual at least provides a solid starting point for the OP's problem.

Dave
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Old 07-14-2011, 06:25 PM   #10
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thank you jim 1/4 will do the generator at best
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Old 07-15-2011, 10:10 AM   #11
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Where is the "OP"?

Have you checked out the engine for a manual fuel pump yet?

Jim
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Old 07-16-2011, 03:14 PM   #12
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I had a '86 HR presidential 33', tag axle, 454 chevy.

Mine had a mechanical fuel pump on the right front of the engine. I replaced it early after I bought the rig in '98 with a new pump I bought at Car Quest. It was still working fine when I sold the rig in '05.

My problem was the carburetor was starving for gas on hill pulls.
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Old 07-16-2011, 03:29 PM   #13
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dont what to say elect i replaced with same holly on race car i run blue pump i run 8700 rpm get a holly red
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Old 07-16-2011, 07:37 PM   #14
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Quote:
Originally Posted by Max Hubrich View Post
I had a '86 HR presidential 33', tag axle, 454 chevy.

Mine had a mechanical fuel pump on the right front of the engine. I replaced it early after I bought the rig in '98 with a new pump I bought at Car Quest. It was still working fine when I sold the rig in '05.

My problem was the carburetor was starving for gas on hill pulls.
Max, On my 33' Itasca it is a very long pull from the tank to carb....Like yours...
Installed a "Carter street/strip" electric fuel pump at the tank, Well Carter lied to me by stating the manual fuel pump WILL pull the fuel through the electric pump......Don't believe some of those geeks.
A decent "Edelbrock manual pump" (#1722) which has the proper fuel pressure (6 PSI) and the flow is 110 GPH or so they say.

Jim
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