All Cads

Author Topic: 1978 Cadillac Eldorado Fuel Pump R&R  (Read 515 times)

Offline dennisspeaks

  • Posts: 365
  • Name: Dennis Mitchell
1978 Cadillac Eldorado Fuel Pump R&R
« on: December 06, 2020, 05:53:07 PM »
I am suspecting that my fuel pump is going, the car has little power and is sputtering when I press on the gas.  How difficult is it to change one out on these, I have not been able to find any youtube videos on this process.

Any brands to stay away from?

Thanks,

Dennis
CURRENT CLASSIC CARS
1976 Eldorado convertible
1977 Eldorado
1975 Sedan d'Elegance
1975 Caprice Classic
1994 Deville
1989 Fleetwood
1989 Town Car Signature
1978 Mark V
1971 Delta 88

PAST CARS
1978 Biarritz
1978 Eldorado
1978 Biarritz
1978  Biarritz
1974 Eldorado - RIP
1976 Eldorado convertible
1990 Sedan Deville -gave to son
1988 Fleetwood Brougham - gave to daughter
1968 GTO
1965 Olds 442

Offline TJ Hopland

  • Posts: 10188
Re: 1978 Cadillac Eldorado Fuel Pump R&R
« Reply #1 on: December 07, 2020, 02:55:43 AM »
A bad pump could cause those symptoms but there is about a dozen other things that could also cause it.   Pump isn't that expensive or difficult so if it doesn't look like its been recently replaced it may not be the worst idea to replace it. 

Its not too bad a job.  The worst part is sometimes the fitting for the hard steel line really doesn't want to come out and there isn't a lot of room to get flare wrenches on it can good leverage.   I have had to cut the line and get it on the bench to get em out then use a piece of hose to splice it back together.   

I get confused between these and the Olds which is a very similar pump just flipped upside down and on the other side of the engine.  One of the bolts gets blocked by the body of the pump so you have to take forever with a open end wrench or I think you can squeeze something like a gear wrench in there.   I find it easier to get at it from below.  You have to be below to deal with the lines anyway. 
StPaul/Mpls, MN USA

73 Eldo convert w/FiTech EFI
80 Eldo Diesel
90 CDV
And other assorted stuff I keep buying for some reason

Offline Roadmaster75

  • Posts: 69
  • Name: Mike Harnack
Re: 1978 Cadillac Eldorado Fuel Pump R&R
« Reply #2 on: December 09, 2020, 12:06:24 PM »
I replaced my fuel pump on my 78 Biarritz.
It was easy and straight forward.
One additional thing.
There is a section of the Cadillac shop manual regarding suspected fuel delivery
issues you have.
It states that while you have the fuel line from tank disconnected, that you carefully set your air compressor
output to 5-8 lbs. of pressure , attach a blow gun, and gently back blow the line to the tank until your
hear bubbling and gurgling.  This is meant to gently blow away any collected debris from the mesh pick up sock in the tank.

Hope this helps.

Offline dennisspeaks

  • Posts: 365
  • Name: Dennis Mitchell
Re: 1978 Cadillac Eldorado Fuel Pump R&R
« Reply #3 on: October 23, 2021, 07:39:49 AM »
TJ and Roadmaster75

Just now saw these replies, thank you.  I sold the car, bought another one and sold it and bought another which a still have.

Thank you.
CURRENT CLASSIC CARS
1976 Eldorado convertible
1977 Eldorado
1975 Sedan d'Elegance
1975 Caprice Classic
1994 Deville
1989 Fleetwood
1989 Town Car Signature
1978 Mark V
1971 Delta 88

PAST CARS
1978 Biarritz
1978 Eldorado
1978 Biarritz
1978  Biarritz
1974 Eldorado - RIP
1976 Eldorado convertible
1990 Sedan Deville -gave to son
1988 Fleetwood Brougham - gave to daughter
1968 GTO
1965 Olds 442

 

Sitemap 1 2 3 4 5 6 7 8 9 10 11 12 13 



All Cads