Project Website: 1984coupedeville.wordpress.com/ I used AC Delco fuel pump EP386. I love it! Works perfectly. AC Delco Fuel Pump part#EP386: http://www.amazo…
Project Website: 1984coupedeville.wordpress.com/ I used AC Delco fuel pump EP386. I love it! Works perfectly. AC Delco Fuel Pump part#EP386: http://www.amazo…
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You’re very welcome. 🙂 Fuel pressure is supposed to be 9-12 psi. I’ll
upload some relevant charts for you and try to send you the links to your
youtube inbox. When you mentioned that it runs like crap and you have to
tap the gas a little to get it run right, it almost sounds like it’s an
idle speed problem. Do you know how to use the climate control to get error
codes? That would be REALLY important to be able to figure out what’s
wrong. I’ll give you instructions if you need.
Nice! I know what you mean about not many videos being out there. If you
have the time and money to work on your car, I say go for it!! I can’t tell
you how long I’ve waited to work on my Caddy. I stopped driving it in 2005,
and I’m just now getting to working on it.
Thank you I have been to that site as well. That’s great it has the service
fitting and thanks for the info! I will pump out the old gas with a RC pump
I use for my model RC planes in a bucket from the tank filler. Fill it with
a few gallons of new gas and purge from that service tap until I see clean
fresh fuel in a separate container. I like to clean out all the lines and
purge the rails in this fashion with new gas 😀
I have a 79 Coupe…is the process the same and are the connections the
same as on yours?
So that would involve to drop the tank anyways as its internal. Ill do the
above cleaning first and may do that later on. I just want to make sure
motor can run and mechanically sounds quiet like it should after all fluids
A to Z are fresh.. Then brake test and crossing my fingers the tranny:D
Thanks, Ill let you know how she is. Btw what material is the strainer made
of?
PS. I definitely recommend getting a shop manual for your car, or at the
very least, a haynes manual will be helpful, and there are also online help
guides at ALLDATADIY(dot)com and CHILTONDIY(dot)com.
Awesome. 🙂 Let me know how it goes!
PS: Make sure your fuel tank is drained… mine had already been pretty
much empty for a couple years, so I didn’t have to drain it.
Make sure to replace the strainer as well that’s connected at the bottom of
the pump…. mine had disintegrated, and I imagine yours will be like that
too.
Hey thanks! I will do this procedure as I have a RC fuel pump and could do
it that way. But can you disconnect the send line at the fuel rail and
purge the rest of the fuel in a container? I have done this in other cars
until I see fresh fuel in the container. Also some fuel rails have a tap to
measure fuel pressure. I have purged fuel from this tap as well. Does the
caddy have this? Haven’t had a chance to get to the car yet. Thanks!
Amen to that! All our cars are 8+ years old and we do all our own car
repair. This is the first project I did pretty much by myself. I was
surprised how much easier it ended up being than I originally thought. If
the fuel pump in the ’92 deville is in the tank (looks like it), the
procedure will probably be very similar. Search “92 deville fuel pump
replacement” on google and you’ll find cadillac forums discussions on it.
Good luck. Let me know if you have any question’s along the way.
Ok, thanks for the reply, i have a 89 seville, so i know there arent many
detailed vids on caddys. The deville u have looks in great condition,
usually people have treated them so bad they need a lot of work. You’re
making me want to get out there & work on mine some more lol it does need a
new rack & pinion…
If you want to flush out the old gas, just get a gasoline syphon from a
local auto parts store, pull out the old gasoline via the filler neck, and
put some fresh gasoline in. Getting the gasoline out won’t be easier if you
drop the tank, but yes, the procedure is the same. If it hasn’t run in 15
yrs, I’d check to make sure the fuel pump is still working. Have a buddy
turn the key in the ignition to the on position (not cranking) while you
listen near the fuel tank for the whirr of the fuel pump.
Is this the same as a 92 deville? You make it look soooo easy! I’m going to
try to do this with my husband, neither of us are mechanics, but we’ll
figure it out. Yay for being poor and having a used vehicle.
Hey started up the Caddy today. Flushed out the 13 year old gas, oil,
filters, and new plugs. It ran good for a bit then was very nice at idle
and quiet. It than ran out of gas. Later on put more gas in and just runs
like crap now. Seems like its starving for fuel but will run if you feather
the gas pedal but idle stalls. Think it’s mucked up from gunk leftover in
the tank I think (hope). What is the fuel pressure for the HT 4100? Thanks
for all your helpful videos 😀
Hello, is this the same tank type on a ’84 Fleetwood? I have found this car
with 30k but has not run in 15 years. Is their a drain plug on the tank
without having to drop the tank to empty it? I want to flush the old gas
out of there without corrupting the pump via to the motor ect. Thanks,
Ok did this job today. That fat hose between the pump and the line was
split. The old pump did work but did replace it with the new AC Delco unit
for 58 bucks. The short fuel line they gave you in the kit was really stiff
like the part had been on the shelf for a long time. Used some fresher line
that fit better as well as the splice connection. She ran mint! Next need
to prime all the brakes and see how they are. Dying to take her down the
freeway. Thanks again 😀
When you put the key into the second position, the fuel pump turns on for a
second (buzzes) then turns off right after. I think this is just to prime
the system or something. When you crank the engine (turning the starter
motor), the fuel injectors spray fuel into the throttle body, so the pump
is running. 🙂
Interesting about the climate control fault codes. Ill check it out thanks!
Hi there. 🙂 I’m not familiar with the ’79 coupe, but after a quick google
search, it seems like it might be a little different. Have you googled a
fuel pump replacement for a 1979 Deville? I did a quick search and found a
post about the topic on the cadillacforums. If you haven’t already
registered there, I highly recommend it. All the guys there are really
helpful, and you usually get replies within a few hours if you write up a
clear post describing your questions.
Hey Thanks! I am going to rent a fuel pressure gage to measure the fuel
pressure at all different throttles. It should be the same and not lag even
at full punch. .You had mentioned before when you turn the ignition at 2
position pump should flow.Does it flow the whole time at ignition 2 or does
it flow during starter motor startup? When I clicked the key to 2nd positon
it would throw some gas then stop. Not continuous.Had to repeat key on and
off to get some gas out from the pump.
Awesome! I’m glad you visited the blog. 🙂 Are you on facebook? If so, I’ll
send you an email with a link to my page so you can add me.
Yea i visited the blog & read about it! Great story, I hope this isnt weird
but lets stay in contact my email is deva_jones@msn.com, we could talk more
our stories are really similar, i’ve been working on cars since I was 16,
my dad worked on cars too etc… i love animals I have 4 cats. but anyway
if you need any tips pointers diagrams for stuff info (i know you’re
already pretty resourceful but 2 heads are better than 1 at least
sometimes), plus there arent many women working on caddys.
After this will replace with a new fuel filter and hope the old filter had
collected the crud at the bottom and sides of the tank. I hope it won’t be
too bad.
yea i’m on facebook that would be great i’ll keep my eyes peeled for the
link ty
The fuel lines run from the throttle body to the fuel tank/pump with a fuel
filter in the middle. I think I saw that one of the fuel lines has a
“service fitting” to measure fuel pressure behind the throttle body (but I
haven’t used it myself). I’m not entirely sure what the best way is to
flush the lines, but if the car has been sitting for 15 years, I’d be
surprised if there is still fuel in the lines. You might check out the
Cadillac forums for more info. Good luck!
When I did this fuel test I had a long fuel line attached to the gas send
line with no filter attached before filter. Basically to the threaded
fitting that would attach to the filter. Ignition was turned on and off
several times to get that pump to send gas through it. Is this normal or is
the pump all done? Other cars I have worked on (VW’s)the pump would keep
going no matter what. But they can overheat with no gas cooling it lol.
So I’m not the only one that works on my cars with my wedding rings on
either lol, great vids keep em coming!
Hahaha, yeah, I sometimes forget to take my ring off. XD Thanks for the
feedback! I’m in the middle of a move from Utah to California, so my next
video may not be until the end of April or beginning of May. 🙂