Re: Carter P4070 Electric Fuel pump shuts off?
[Re: mopars4ever]
#2636058
03/23/19 06:14 PM
03/23/19 06:14 PM
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might be overheating the pump and tripping a thermal cutout. You really need to get in there with a meter when it's happening and see what's missing.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: 6T9RR]
#2636067
03/23/19 06:37 PM
03/23/19 06:37 PM
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TJP
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The oil pressure switch shouldn't be carrying the electrical load because I have the pump wired through a relay. At least that is what I thought the relay is for, to carry the load once it is switch on, the oil pressure switch will turn the relay off if oil pressure is dropped off below 5 - 3 psi. I do appreciate the input thought. Providing the relay is wired properly, the connections are all good,The relay and wiring are sized properly about the only thing left is a flaky ground. Doubtful you would get two bad pumps in a row but possible. ' A schematic would help Have you tried a failed pump off the car??? Maybe check the resistance across the terminals?? Next stop might be to call their tech support.
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: TJP]
#2636092
03/23/19 07:27 PM
03/23/19 07:27 PM
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Posts: 88 Oregon
6T9RR
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I've double checked the wiring itself, all things look good, gauge, connections, grounds, as for the oil safety switch, I'll have to look into checking to see if it is operating correctly. I have read about thermal shut downs on these pumps happening, I'll have to work on wiring up a multi-meter to see if I can detect when it is shutting down, then checking the pump to see if it is hot. Again, I do appreciate all inputs, this has been an issue since I put the first P4070 in last September.
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: 6T9RR]
#2636177
03/23/19 09:55 PM
03/23/19 09:55 PM
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RapidRobert
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This may have already been covered but I would run 12V right to the pump itself & take it for a spin, if (now) ok this would elim the pump/ground path.
live every 24 hour block of time like it's your last day on earth
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: calrobb2000]
#2636265
03/24/19 08:27 AM
03/24/19 08:27 AM
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hi hi you must have the right psi switch , it will need to be a n o switch . < normaly open > psi will close the contacts to run te pump. It runs for a while then shuts down. The switch isn't magically changing from NO to NC.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: Supercuda]
#2636459
03/24/19 02:23 PM
03/24/19 02:23 PM
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Joined: Jan 2003
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TJP
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hi hi you must have the right psi switch , it will need to be a n o switch . < normaly open > psi will close the contacts to run te pump. It runs for a while then shuts down.The switch isn't magically changing from NO to NC. However, if the Oil pressure switch is not and on / off type switch, but rather one that varies the resistance to ground via the oil pressure being being produced ( think gauge sending unit), it could cause some issues activating the relay coil keeping in mind the resistance changes as the engine warms up and the pressure drops. Roberts idea is also not a bad one as it would identify the circuitry or the pump as the culprit keep us posted
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: TJP]
#2636540
03/24/19 05:09 PM
03/24/19 05:09 PM
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Well switch does imply on/off and sender implies variable resistance. So assuming he does have a switch like he stated then that should not be it. But if he had a sending unit instead then yeah that might be an issue but he'd have to have something like a temperature sender that changes as it gets hot. Oil pressure sender would pretty much change immediately once the engine is running.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: TJP]
#2636628
03/24/19 08:44 PM
03/24/19 08:44 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
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With more thought I dont think it is the pump/ground but I still think I'd grab a long jumper & get those parts elimed.
live every 24 hour block of time like it's your last day on earth
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: 6T9RR]
#2636953
03/25/19 01:02 PM
03/25/19 01:02 PM
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Joined: Feb 2004
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aspenrt360
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Nice, keep us informed please.
2013 Chrysler 300 touring 1974 Dodge Charger SE. 360-727-8.75-3.23 sure grip 1972 Dodge Dart Swinger 1995 Dodge Ram 1500 4x4
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Re: Carter P4070 Electric Fuel pump shuts off?
[Re: stumpy]
#2643431
04/09/19 09:21 PM
04/09/19 09:21 PM
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Diplomats used a similar switch to power the choke only when the engine was running. Since his FP is on a relay that switch would also work fine for his setup.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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