Question about 1989 Dodge Dynasty

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What if you put in fuel pump and car runs for 2 days and when you go to start the car runs for 3 seconds what can cause that to happen

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Sounds like fuel pump relay is not switching from start to run. I recommend replace relay first

Posted on Apr 11, 2015

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My Honda accord 2003 has trouble starting first of the day. Starts fine for the rest of the day, what could this be?


One thing that happens on older Hondas is that the fuel pressure bleeds off when they sit overnight. The fuel pump puts out 40 psi, and the system is supposed hold that pressure when the car is off. The check valve is weak. Then you try to start it and with no fuel pressure it takes awhile to start, and may run rough for a few seconds. To see if this is the cause, on your first start of the day, turn the key on but don't try to start it. When all the warning lights are on. The fuel pump will run for 2 seconds, then turn off. If it is quiet enough, you might hear it, or the main relay clicking off after 2 seconds. Cycle the key on for 2 seconds and then off, do this 5-6 times. Then try to start it. If it starts right up, you know the problem. Most people just accept this, because the check valve is part of the fuel pump, and this isn't cheap.

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For how long after does it make noise it's not uncommon for the pump to stay running 3-7 seconds after shut down however if it getting noisy you may need to change your fuel filter restrictions in the system will make it noisier

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My 91 cutless ran out of gas one day and has never ran right since. Replaced ever sensor on the car, fuel pump every thing. Runs good for 2 or 3 days and then it won't stay started. Went out few mouths...


You may have loaded a fuel line or connector up with contaminants. What else is happening during the second or 3rd day of running? Is it running low on fuel? Try to make a list of your gauge set! It only makes sense.

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No power on fuel pump in buick century 93, i changed the relay & fuse is ok, that always happen after the car became hot ,next day it wont start


If the fuse and relay is good, and there is power AT the pump, then the pump is bad. Fuel pump power goes through the oil pressure switch but only after engine is running. So there should be power to the pump for approx 2 seconds when you turn key on. There is a RED wire (prime, it will be a single wire poking out near relay) at the fuel pump relay, if you put 12V on that wire the pump should run, IF the wires and pump is good. The GRAY wire powers the pump.

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1997 town car wont start in the morning but works fine the rest of the day. what can cause this to happen?


Most common problem for this is fuel delivery. Check the fuel pressure. A weak fuel pump can do this. Try turning the key in the run position for 10 seconds then off for 3 seconds then try to start it.This will bring up the fuel pressure because the pump will run longer without the injectors pulsing. If fuel pressure is o.k. Try opening up the throttle about 5% or so. If the Idle Air Control (iac) is not opening up like it should this can also be a problem. Usually the Day!

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My 2005 malibu 6 cyl has 54000 miles and no pior problems or warnings i went out and started it and came inside while it warmed up and when i went back out about 10 minutes later the car wasnt running, and...


many ideas lol. sounds like the fuel pump may have froze up. was the tank below 1/2/? moister in the fuel can cause this. any way to warm the car? this would be my first step

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1 Answer

2002 blazer crank but wont start


2 things that you have to check on no starts every time. Spark at spark plug and fuel. Turn key to run position and listen at gas tank for fuel pump to run you should hear a whining noise. This will only happen for 3 to 4 seconds then it will shut off until engine starts. You can turn key off then to run every 3 to 4 to listen for fuel pump. You may hear the relay click off in engine area even if pump does not run. Fuel pump failure is pretty common. If pump is running pull spark plug out or put a spare plug into spark plug wire and have someone crank engine set plug on engine and watch for spark. This will give you a starting point. Hope it helps.

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2 Answers

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Check the fuel pump, make sure it is putting out proper pressure if not then change the fuel pump

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1 Answer

2001 Xterra - Replaced fuel pump twice and is still not running.


I am no expert, but I just had a similar problem. The car would shake and buck when accelerating. It finally just died and would not start. After sitting for some time, the car would start and run a while, then do the same thing. I thought fuel pump. The dealer diagnosed distributor. After replacing, the car is running perfect. Something to think about. Good luck.

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