Author Topic: Fuel issues on 1989 super cheif. Cuts out under load  (Read 405 times)

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Offline Rodib1

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  • I own a: Winnebago
  • Year: 1989
  • Model: Super chief
  • Chassis: Chevy
  • Engine: 454
Fuel issues on 1989 super cheif. Cuts out under load
« on: January 12, 2022, 01:41 AM »
New to the rv world and not a mechanic (playing one)

I bought a 1989 Winnebago super cheif with a 7.4 drove it home  and it ran fine. Did a mini road trip and smelled gas and saw It was leaking at the mechanical fuel pump and pressure regulator and end up limping it home. It would accelerate to about 30 the start cutting out(starving for fuel)  I replaced both of the parts (twice actually) and it still cuts out under load so I figured it might be something else so this is what I did since the.

(1) Changed both parts list above
(2)blew air on two lines running back to tank( heard there could be screen clogged
(3)replaced all visible vacuum lines
(4)alternator
(5) replaced small gas filter in carb
(6) blindly messed with pressure regulator (

Going to try change coil and spark plug and Distributor cap
And a fuel pressure gauge(finding it hard to t in the line)

Heard there might be additional fuel pump located in the tank

Any help, directions or advise would be greatly appreciated


Offline Oz

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  • Year: 1974
  • Model: D24 Indian
  • Chassis: Dodge
  • Engine: 440-3
Re: Fuel issues on 1989 super cheif. Cuts out under load
« Reply #1 on: January 12, 2022, 07:56 AM »
Yep, you got an in tank pump.  Message search it. Anything and everything about it is already here

You said you replaced the small filter.  What about the main fuel filter?  That's the first thing to replace whenever you have fuel starvation before jumping into anything else.

Offline Rodib1

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  • I own a: Winnebago
  • Year: 1989
  • Model: Super chief
  • Chassis: Chevy
  • Engine: 454
Re: Fuel issues on 1989 super cheif. Cuts out under load
« Reply #2 on: January 12, 2022, 06:50 PM »
I have searched all over the whole unit and have yet to find a main filter anywhere . Today I changed spark plugs and DISTRIBUTOR and distributor rotor

Offline Rodib1

  • Test Driver
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  • Posts: 4
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  • I own a: Winnebago
  • Year: 1989
  • Model: Super chief
  • Chassis: Chevy
  • Engine: 454
Re: Fuel issues on 1989 super cheif. Cuts out under load
« Reply #3 on: January 12, 2022, 10:01 PM »
I followed both lines back. There is a area where it looks like it was cut off . Rubber hose connecting the line back together . Is there anything else I can do besides dropping fuel tank and cleaning carb

Offline Rodib1

  • Test Driver
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  • Posts: 4
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  • I own a: Winnebago
  • Year: 1989
  • Model: Super chief
  • Chassis: Chevy
  • Engine: 454
Re: Fuel issues on 1989 super cheif. Cuts out under load
« Reply #4 on: January 14, 2022, 01:48 AM »
Update: the intank fuel pump was the problems

Online Elandan2

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  • Year: 1977
  • Model: Elandan II D27DRK
  • Chassis: Dodge M500
  • Engine: 440
Re: Fuel issues on 1989 super cheif. Cuts out under load
« Reply #5 on: January 14, 2022, 08:48 AM »
Good news :)clap
Rick and Tracy Ellerbeck

Offline LJ-TJ

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  • Year: 1975
  • Model: D21
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Re: Fuel issues on 1989 super cheif. Cuts out under load
« Reply #6 on: January 14, 2022, 09:02 AM »
Nothing makes me happer than to see a none mechanic stick with the problem until he gets it figured out. More importantly he throws his pride aside and ASKS the question what am I doing wrong. That's why we're here. The only stupied question around here is the one you don't ask. I'm not a mechanic either. I can't screw a light buld in. But when it comes to my 1975 21ft Winnebago with a 440 in it. I can get the job done. Well done mate. Proud of ya. Glad to see you got it figured out