Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099602
06/27/16 10:25 PM
06/27/16 10:25 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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I assumed you checked the filter.. next thing.. if you have the stock sock in the tank take the fuel cap off and blow shop air into the pick up tube to blow the sock off... final thing is the vent.. make sure its open and you have enough vent for the power If it does it at idle.. open the gas cap and see if it will do it
Last edited by MR_P_BODY; 06/27/16 10:43 PM.
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099616
06/27/16 10:48 PM
06/27/16 10:48 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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Re: Carter HV Fuel Pump Pressure Loss
[Re: MR_P_BODY]
#2099660
06/27/16 11:27 PM
06/27/16 11:27 PM
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Joined: Feb 2010
Posts: 270 Mountain View, CA
68rrunner
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I assumed you checked the filter.. next thing.. if you have the stock sock in the tank take the fuel cap off and blow shop air into the pick up tube to blow the sock off... final thing is the vent.. make sure its open and you have enough vent for the power If it does it at idle.. open the gas cap and see if it will do it Checked the filter, it was good but nuked the o-ring on disassembly (XRP rebuild-able) Swapped in a new one. Blew the lines out with the cap on and off, blew a bunch of fuel out. Have tried idling it with cap on and off, no change.
Last edited by 68rrunner; 06/27/16 11:28 PM.
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099735
06/28/16 01:02 AM
06/28/16 01:02 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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I'm going to check that first thing tomorrow. I'm afraid for that and the cam eccentric. It's pretty much come down to: -Push Rod / Cam Eccentric (anyone know what the "throw" is supposed to be?) -Pump type (Pump one came off of a running 383 and pump two came off of a running 440; both had less than 5k miles on them) I really doubt the rod or the eccentric are bad.. it wouldnt build the pressure right away then drop... I think your getting crap pumps. are they rebuilds EDIT I think its a heat related issue.. but maybe the eccentric isnt turning when it start to warm up(the hole to big)
Last edited by MR_P_BODY; 06/28/16 01:07 AM.
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099767
06/28/16 02:06 AM
06/28/16 02:06 AM
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Joined: Jan 2003
Posts: 11,786 Portage,michigan
B3422W5
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Doubt it's a heat soak problem with the engine running just that short amount of time. The pump is in its born location. Shouldn't get hot there.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam, footbrake street/strip car Best so far, 10.32 1/4 1.41 best 60 foot 6.56 at 104.17
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Re: Carter HV Fuel Pump Pressure Loss
[Re: Hot 340]
#2099780
06/28/16 02:43 AM
06/28/16 02:43 AM
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Joined: Oct 2006
Posts: 427 Sweden
Mopar Guy
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mopar
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Pump rod might be shot. That can drive you nuts looking for the problem. ×2 Mesiure the rod !
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Re: Carter HV Fuel Pump Pressure Loss
[Re: Mopar Guy]
#2099783
06/28/16 02:58 AM
06/28/16 02:58 AM
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Joined: Feb 2010
Posts: 270 Mountain View, CA
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Pump rod might be shot. That can drive you nuts looking for the problem. ×2 Mesiure the rod ! Pulled a known good rod and measured it (3.225) I'll pull the one out fo the running-ish motor tomorrow in the morning and report back; but...if the rod is wiped, wouldn't the same be for the eccentric? But assuming I have a shorter rod; (they came in two lengths i believe) how would the warming up effect pressure output? It gets bounced back and forth like a floating valve or something? As a note, after I swapped pumps, it "pumped up" the pressure as the system started drawing and then the needle would "tick"a half psi or so. If I revved it to 3k or so, the pressure would hold steady. Also to note; it's a completely cast iron engine and I'm in Southern AZ, so today's ambient temp was 108ish. However, the cooling on this and all my cars is/are exceptional and this thing would/could/did idle for 20 minutes in the sun and never went over 196* when I was stress testing the heat system a couple of weeks ago. That and fuel supply was adequate to do that testing. Frustrating but fun!
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099863
06/28/16 11:04 AM
06/28/16 11:04 AM
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Joined: Feb 2010
Posts: 270 Mountain View, CA
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Just pulled the rod. I'm going to go ahead and say the rod is wiped. Well grooved on the Cam end and only measuring 2.991" at it's shortest point. So now the question is...if it ate the pushrod; do I slam in this fresh rod and keep my fingers crossed, or is safe to say the cam eccentric is wiped too? And does anyone know the amount of lift the eccentric is supposed to give so I could run a quick measurement?
Last edited by 68rrunner; 06/28/16 11:09 AM.
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099895
06/28/16 11:51 AM
06/28/16 11:51 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Just pulled the rod. I'm going to go ahead and say the rod is wiped. Well grooved on the Cam end and only measuring 2.991" at it's shortest point. So now the question is...if it ate the pushrod; do I slam in this fresh rod and keep my fingers crossed, or is safe to say the cam eccentric is wiped too? And does anyone know the amount of lift the eccentric is supposed to give so I could run a quick measurement? Been so long since I worked on a BB but is the eccentric built on the cam or is it a add on like the SB
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099897
06/28/16 11:55 AM
06/28/16 11:55 AM
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Joined: Jan 2003
Posts: 13,492 Marion, South Carolina [><]
an8sec70cuda
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CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099916
06/28/16 12:22 PM
06/28/16 12:22 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Romeo MI
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I believe it's built into the cam, between the front Bearing surface and the Oil Pump/Dizzy drive gear. Measure the diameter of the rod and find something close to it but longer so it sticks out of the pump mount and see how much movement you get from the rod and hope the eccentric is ok... good luck... or its time for a electric pump EDIT A transfer punch might be long enough(dont put the pointed end in )
Last edited by MR_P_BODY; 06/28/16 12:24 PM.
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099921
06/28/16 12:30 PM
06/28/16 12:30 PM
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Joined: Feb 2010
Posts: 270 Mountain View, CA
68rrunner
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I already loaded the good rod in and coated it with assembly lube. I"m going to depth gauge it when my guys get in this morning. I couldn't roll the engine over and hold the gauge by myself.
I was hoping someone would know the lobe height.
Last edited by 68rrunner; 06/28/16 12:31 PM.
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Re: Carter HV Fuel Pump Pressure Loss
[Re: 68rrunner]
#2099926
06/28/16 12:35 PM
06/28/16 12:35 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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The two wear together...... Or live together.
You can put a new/different rod in it, but you'll be on borrowed time.
You didn't say what type of cam you have, but I'm assuming its a cast cam core.
If it's a billet core(roller cam), they don't often live when used with a std pushrod(although I did get away with it on my own motor).
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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