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Fuel pump pushrod issue ??? 440 66 Fury #1066815 09/01/11 11:45 AM 09/01/11 11:45 AM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	So I got everything back together on the Fury last night. Ever part of the fuel system is new. From the pick up to the carb. Well only one old part, the fuel pump push rod. I still have the same issue I had before . I can't get more then 3 psi of fuel pressure, and with in a minute, I have nothing. I'm running a e-Brock mech pump. I pulled the pump off and checked the length of the pushrod. It is 3.22" long. I found comp cams sell to different lengths of rods. 3.22 and a 3.242. The pump arm only has .75 of movement. My current push rod does not look wore or damaged. I also pulled the distributor to look at the cam. No signs of wear there either. I have also tried running the car from a gas can. No luck. Any help is appreciated. Thanks

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066816 09/01/11 11:49 AM 09/01/11 11:49 AM
Joined: Feb 2003 Posts: 8,677 A Andrewh master
Andrewh master A Joined: Feb 2003 Posts: 8,677	see how much the rod moves? turn the motor over by hand. mark it when it bottoms out and when it tops out. see if it moves that .75 for you.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066817 09/01/11 11:59 AM 09/01/11 11:59 AM
Joined: Jun 2008 Posts: 102 Colo P PJ68RT member
PJ68RT member P Joined: Jun 2008 Posts: 102 Colo	Are you running a vapor separator? Or any kind of return line? If the return line orifice is too big it will have low pressure. Just went through this on mine. The Year One vapor separtor i bought had the return line orifice too big. Should be .060, mine was .100.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: PJ68RT] #1066818 09/01/11 12:11 PM 09/01/11 12:11 PM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	Quote: Are you running a vapor separator? Or any kind of return line? If the return line orifice is too big it will have low pressure. Just went through this on mine. The Year One vapor separtor i bought had the return line orifice too big. Should be .060, mine was .100. I'm just running a 6AN line from the tank to the pump. No returns or separator.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066819 09/01/11 12:18 PM 09/01/11 12:18 PM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	http://postimage.org/image/wvf12nyc/ http://postimage.org/image/wv53ukzo/ Just some under the hood pics. http://postimage.org/image/1e6heigv8/full/ Last edited by moparguy1967; 09/01/11 12:23 PM.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066820 09/01/11 12:22 PM 09/01/11 12:22 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Is your tank vented enough? Try removing the gas cap and see what happends. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066821 09/01/11 12:50 PM 09/01/11 12:50 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	it acts EXACTLY like it did b 4 after replacing all these parts? & you hooked a gas can 2 the mech pump inlet & no ch? Std p rod length is 3.250" so I dont think .030" shorter is killing you. I'm gonna go out on a limb & say that the new pump is malfunctioning which is confusing the issue because everything was replaced right? & you wouldn't think the new pump would b the prob that it has 2 be something else but there ain't nothing else unless we're missing something. The can/hose on the inlet elims everything rearward. The cam lobe/purod are solid & will b constant as in if the stroke was too short it would still stay at a constant (but too low) psi & not drop. That only leaves the pump & I had one act like that. If it's a rebuildable one open it up & see if anything looks out of whack & I'm assuming not an oddball issue like E10 vapor locking but it happens pretty quick?. Holler when you find something but I bet on the pump live every 24 hour block of time like it's your last day on earth

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: Mr.Yuck] #1066822 09/01/11 04:20 PM 09/01/11 04:20 PM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	Quote: Is your tank vented enough? Try removing the gas cap and see what happends. I tried running off a gas can, and change.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: RapidRobert] #1066823 09/01/11 04:23 PM 09/01/11 04:23 PM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	I put another pump on it, and it still has the same issue. I have a Mallory 110 pump I want to put on it. But I can't find a good place to mount it.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066824 09/01/11 04:58 PM 09/01/11 04:58 PM
Joined: Jan 2003 Posts: 75,023 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,023 U.S.S.A.	Quote: I put another pump on it, and it still has the same issue. I have a Mallory 110 pump I want to put on it. But I can't find a good place to mount it. have you tried another guage ? The electric pump needs to be as close to the fuel source as possible , over the rear axle off to one side is a possible place , make sure the rear axle won't hit anything with full suspension compression.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: JohnRR] #1066825 09/01/11 05:41 PM 09/01/11 05:41 PM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	Quote: Quote: I put another pump on it, and it still has the same issue. I have a Mallory 110 pump I want to put on it. But I can't find a good place to mount it. have you tried another guage ? The electric pump needs to be as close to the fuel source as possible , over the rear axle off to one side is a possible place , make sure the rear axle won't hit anything with full suspension compression. I swap out the autometer gauge for a Russell one. If anyone has a 65-66 C-body with a stock tank and an electric pump. I'd like to see some pics. Thanks

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066826 09/02/11 08:01 PM 09/02/11 08:01 PM
Joined: Aug 2004 Posts: 1,213 Los Angeles, CA Mobarge pro stock
Mobarge pro stock Joined: Aug 2004 Posts: 1,213 Los Angeles, CA	I wouldn't have believed it if it didn't happen to me - my cam wore down my fuel pump pushrod (a newer Mopar Performance piece) within 2,000 miles. Pressure kept dropping and dropping over time (from a solid 6.5 PSI to about 2), and I fixed or replaced about everything to find the problem. When I had the engine out last year, I went into "just in case" mode, and checked the pushrod against a new Mopar Performance unit, and what do you know... it was about 3/8 of an inch SHORTER. It was clearly worn down. I put the new MP pushrod in knowing I would probably have to replace it anyway at some point. Fuel pressure was good for a while, but I see it dropping off now. An electric fuel pump is in my future! '71 SSP - SOLD!

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: Mobarge] #1066827 09/05/11 05:13 PM 09/05/11 05:13 PM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	Who makes a good fuel pump push rod, and what is the correct length? I've found 2 lengths online 3.22 and 3.242

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066828 09/05/11 05:30 PM 09/05/11 05:30 PM
Joined: Jan 2003 Posts: 1,412 E Central IN N nd65 pro stock
nd65 pro stock N Joined: Jan 2003 Posts: 1,412 E Central IN	I spent most of my summer chasing the same issue in my 440. It ended up being the fuel pump push rod. When I removed mine and compared it to a new hardened one from Hughes Engines my old one was about 1/3" shorter. The cam had also worn it to the profile of the lobe. I built my motor in 2010 and used the original pump rod and a Lunati Voodoo cam. Maybe 1000 miles on it. I just got it back together this weekend. Took it out today and all is well. She runs great. Like you, with hoses on the pump and straignt to a gas can, it would not pump at all before I changed it out. Good luck

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066829 09/05/11 06:36 PM 09/05/11 06:36 PM
Joined: Jan 2003 Posts: 9,436 Blair County,PA 62maxwgn master
62maxwgn master Joined: Jan 2003 Posts: 9,436 Blair County,PA	Quote: Who makes a good fuel pump push rod, and what is the correct length? I've found 2 lengths online 3.22 and 3.242 I have a 25yr old N.O.S. original that measures 3.215

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: 62maxwgn] #1066830 09/12/11 09:43 PM 09/12/11 09:43 PM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	My new CompCams pushrod came in today. Same length as my old one.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066831 09/14/11 05:26 PM 09/14/11 05:26 PM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	I don't know what else to check out. Should I buy another new fuel pump? Could the camshaft be the issue? Maybe something with the carb?

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: moparguy1967] #1066832 09/14/11 10:10 PM 09/14/11 10:10 PM
Joined: Jan 2003 Posts: 720 Texas J jetdoctor_75402 super gas
jetdoctor_75402 super gas J Joined: Jan 2003 Posts: 720 Texas	AN6 fuel line? rubber or rubber with stainless shielding over it or steel line from tank to pump with original style hose sections as installed at oem? Reason I ask is I bought some China made high press fuel injection hose from a reputable parts house and started having issues like yours and found the the inner wall of the dual wall hose was collapsing and starving the engine. 440 with 750 EB and and high perf mechanical fuel pump. Just a thought. doc Last edited by jetdoctor_75402; 09/14/11 10:12 PM.

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: jetdoctor_75402] #1066833 09/14/11 10:46 PM 09/14/11 10:46 PM
Joined: Jul 2003 Posts: 577 Grand Rapids, MI 1 11secondC mopar
11secondC mopar 1 Joined: Jul 2003 Posts: 577 Grand Rapids, MI	Sorry if this has been asked before, is the car having driveability issues? Have you tried another gauge to verify?

Re: Fuel pump pushrod issue ??? 440 66 Fury [Re: 11secondC] #1066834 09/15/11 07:20 AM 09/15/11 07:20 AM
Joined: Apr 2004 Posts: 329 Frederick, MD M moparguy1967 OP enthusiast
moparguy1967 OP enthusiast M Joined: Apr 2004 Posts: 329 Frederick, MD	Quote: Sorry if this has been asked before, is the car having driveability issues? Have you tried another gauge to verify? I have not been able to drive the car. I will prime the fuel bowls, the car will run for a few minutes, then the pressure will slowly drop to nothing. When the engine finally shouts off, the fuel bowls will be empty. I tried running the car off of a gas can, still had the same issues. So I don't think, it's the lines, tank, or pick up. I've seen your car on the Dry Dock. Are you running a stock tank or a fuel cell? Mech or elec pump?

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