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Need help with 440 (Long)
#305943
05/02/09 09:13 PM
05/02/09 09:13 PM
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Joined: Feb 2007
Posts: 86 Indiana
soul challenger
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OP
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Joined: Feb 2007
Posts: 86
Indiana
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I have a 440 in a 74 Charger. This engine has been in this car for 4 years with no problems. I got it out this year and it ran great. On the way home from a show it started to run bad. It will idle OK in park, but when I put it in gear it won't hardly idle and once it warms up it loses fuel pressure. Going down the road it runs great until you have to stop, then it wants to die. I figured it was the fuel pump. I replaced it and checked the pump push rod and it looks good. I also checked the fuel filter and it is fine as well. Any ideas on what the problem may be? Thanks
"She ain't revved till the rods are thrown." DBT
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Re: Need help with 440 (Long)
[Re: stumpy]
#305945
05/02/09 09:27 PM
05/02/09 09:27 PM
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Joined: Feb 2007
Posts: 86 Indiana
soul challenger
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It is a mechanical fuel pump. I have an inline gauge. It has pressure when cold, the warmer it gets the less pressure it has, goes to zero. Thank you.
"She ain't revved till the rods are thrown." DBT
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Re: Need help with 440 (Long)
[Re: soul challenger]
#305946
05/02/09 09:28 PM
05/02/09 09:28 PM
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Joined: Jun 2004
Posts: 3,382 St. Charles, MO
wingman
Uncreative Title
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Uncreative Title
Joined: Jun 2004
Posts: 3,382
St. Charles, MO
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Do you have a press guage at the carb feed line?
That will help you figure out if it is a carb problem of a fuel feed problem.
Ever drop the fuel tank (crud)?
1969 Dodge Coronet Super Bee 383 A4 1970 Plymouth Road Runner 440 FC7 (sold)
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Re: Need help with 440 (Long)
[Re: wingman]
#305947
05/02/09 09:31 PM
05/02/09 09:31 PM
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Joined: Feb 2007
Posts: 86 Indiana
soul challenger
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I had the tank out a few years ago and it looked brand new inside. That may be the next thing I do is check the tank.
"She ain't revved till the rods are thrown." DBT
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Re: Need help with 440 (Long)
[Re: soul challenger]
#305948
05/02/09 09:36 PM
05/02/09 09:36 PM
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Joined: Mar 2008
Posts: 5,746 Ontario, Canada
Dodgem
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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Quote:
It is a mechanical fuel pump. I have an inline gauge. It has pressure when cold, the warmer it gets the less pressure it has, goes to zero. Thank you.
is it a fluid filled gauge?
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Re: Need help with 440 (Long)
[Re: soul challenger]
#305949
05/02/09 09:37 PM
05/02/09 09:37 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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carb/vacuum leak/ EDIT possibley plugs/wires
Last edited by RapidRobert; 05/03/09 01:56 AM.
live every 24 hour block of time like it's your last day on earth
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Re: Need help with 440 (Long)
[Re: gch]
#305951
05/03/09 09:15 AM
05/03/09 09:15 AM
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Joined: Jan 2003
Posts: 5,270 Missouri
MY340
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master
Joined: Jan 2003
Posts: 5,270
Missouri
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Check for cracked hoses from tank to carb if you have any as it may be sucking air.
1970 FE5 Duster 360/904/3.91's SOLD
1973 TB3 SpaceDuster 340/4spd/4.10's SOLD
Moparless for now but when the opportunity is right I'll have another one.
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Re: Need help with 440 (Long)
[Re: MY340]
#305952
05/03/09 10:04 AM
05/03/09 10:04 AM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Check for cracked hoses from tank to carb if you have any as it may be sucking air.
that's what I'd do 1st. a crack line will do that. The one at the tank to the main line check 1st.
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Re: Need help with 440 (Long)
[Re: Mr.Yuck]
#305953
05/03/09 07:04 PM
05/03/09 07:04 PM
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Joined: Feb 2007
Posts: 86 Indiana
soul challenger
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Indiana
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Thanks alot for the help. I thought the rubber line from the tank to the main line was kinked, replaced it with braided hose and it still won't run right.
"She ain't revved till the rods are thrown." DBT
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Re: Need help with 440 (Long)
[Re: Pacnorthcuda]
#305956
05/05/09 06:27 AM
05/05/09 06:27 AM
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Joined: Jan 2003
Posts: 5,906 Athens, Greece
Pyper70
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Athens, Greece
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Check to see if you have the 4 atmospheric breather tubes blocked off on the fuel tank (from the underside) I blocked mine off when I installed the tank on my 70 Charger and I lost fuel pressure because the fuel tank was sucking it back from the motor. Make sure you have proper vent lines. Drive around with a 1/4 tank of gas and some duct tape with holes in it on the gas cap area and see if the car runs right. Late at night so fuel doesnt go sloshing in and out of the neck tube.
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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