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Starts then shuts off

Tiny
REAPER1992
  • MEMBER
  • 2007 DODGE NITRO
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
It was having fuel pump issues that was replaced and it has new run relays. I was going to check fuel pressure but I do not have the special adapter to check it. I was wondering if there was any ideas I have not thought of. I am checking fuel, air, spark, timing is good spark. I am assuming it is good because it starts but then shuts off shortly after. So I am thinking either fuel press or air, but it has clean air filter and no vacuum leaks. Is there anything I can do with out special tools for that vehicle?
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Thursday, January 3rd, 2019 AT 4:26 PM

21 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
How long does it take to stall? Will the engine remain running if you hold the accelerator pedal down 1/4"?

This guide will help us

https://www.2carpros.com/articles/engine-stalls

Please run down this guide and report back.
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Thursday, January 3rd, 2019 AT 4:31 PM
Tiny
REAPER1992
  • MEMBER
  • 39 POSTS
It starts hits 500 rpm then shuts off.
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Thursday, January 3rd, 2019 AT 10:11 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
How long does it take to stall? Will the engine remain running if you hold the accelerator pedal down 1/4"? Was the battery recently disconnected or run dead?
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Friday, January 4th, 2019 AT 5:07 PM
Tiny
REAPER1992
  • MEMBER
  • 39 POSTS
Okay, so there is no fuel getting to the fuel rail so checking for power at the fuel pump, but where? I do not have a lift and I work I do not have a ton of time to drop the tank. So will be doing that is there a fuel pump relay that is not built into the fuse box on that thing that could be causing it? On the stalling part I think it was just starting from fumes cause it started then shut off within a second or two.
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Friday, January 4th, 2019 AT 5:26 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
Dandy. The first thing to do is to hold the accelerator pedal down 1/4". If the engine stays running that way, the cause is the battery was disconnected recently. The fix is real easy for that.

Next, listen for the hum of the fuel pump for one second when you turn on the ignition switch. If you don't hear that, listen next to the tank while a helper turns the switch on. If you still don't hear it, suspect the pump has failed. Often you can get them started again by banging on the bottom of the tank. When that works, it will almost always stay running until you stop the engine. The problem could act up again the next time you try to start the engine, or it might not act up again for weeks.

If nothing has worked up to now, what I would do is see if the engine will run longer with starting fluid. The fact it runs for a couple of seconds proves it has spark. That eliminates the cause of 95 percent of crank / no-starts. There is usually no separate fuel pump relay. The automatic shutdown, (ASD) relay sends current to the fuel pump and the ignition coils and injectors. That relay has to be turning on if there is spark.
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Saturday, January 5th, 2019 AT 4:17 PM
Tiny
REAPER1992
  • MEMBER
  • 39 POSTS
Okay, so the intake manifold was pump back on today and the car would not start at all. Then dropped the tank and pulled the fuel line off the pump, had the key turned and no fuel came out. Is there another fuel pump relay other then the one built into the fuse box? There was not much online about these vehicles.
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Saturday, January 5th, 2019 AT 6:50 PM
Tiny
REAPER1992
  • MEMBER
  • 39 POSTS
Does this vehicle have a fuel pump relay not built into the TIPM? And if it does do you know where it is located?
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Sunday, January 6th, 2019 AT 4:33 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
No fuel pump relay. It is switched on by the TIPM through fuse M25, a 20-amp fuse. Look for the two test points on top of that fuse. You can check for voltage there, but remember, it will only be there for one second when the ignition switch is turned on. That means you'll need a helper to run the switch while you watch for voltage. A test light works best for this because most digital voltmeters don't respond fast enough. Check for voltage on both sides of the fuse. If it appears briefly on one side but not on the other, that fuse is blown.
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Sunday, January 6th, 2019 AT 5:37 PM
Tiny
REAPER1992
  • MEMBER
  • 39 POSTS
Okay, thank you. That is what I thought but was not sure.
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Sunday, January 6th, 2019 AT 6:38 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Here is a guide to help you check for power at the fuse and the fuse location as well:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, January 9th, 2019 AT 10:47 AM
Tiny
REAPER1992
  • MEMBER
  • 39 POSTS
Thank you guys for all the help.
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Wednesday, January 9th, 2019 AT 11:08 AM
Tiny
REAPER1992
  • MEMBER
  • 39 POSTS
Got it running. Thank you
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Wednesday, January 9th, 2019 AT 5:34 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Oh good. What was the problem after all?
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Thursday, January 10th, 2019 AT 11:34 AM
Tiny
REAPER1992
  • MEMBER
  • 39 POSTS
After checking the fuses with multi meter, I started tracing the wires with the multi meter and found a break in the power wire to the fuel pump where the wire comes through the fire wall.
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Thursday, January 10th, 2019 AT 10:07 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
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Friday, January 11th, 2019 AT 10:35 AM
Tiny
RYEX784
  • MEMBER
  • 1 POST
  • 2007 DODGE NITRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 63,000 MILES
I replaced a water pump on a 2007 Dodge Nitro and now when I start it I have to stay on the gas to keep it running. What would cause that?
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Friday, January 11th, 2019 AT 10:36 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Recheck to make sure you didn't leave any vacuum hoses disconnected or damaged. Also, make sure the idle air control valve is connected at the throttle body. If there is a check engine light coming on, have the computer scanned to identify where the problem is coming from. Most parts stores will do it for free.
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Friday, January 11th, 2019 AT 10:36 AM (Merged)
Tiny
ALFREDTHOMPSON
  • MEMBER
  • 1 POST
  • 2008 DODGE NITRO
  • 25,000 MILES
2008 Dodge Nitro, put in stale/old gas, started runnung rough and stalling. It will start but RPMs just start falling off, will not rev up and not able to stay running before it shuts down. What do you suggest?
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Friday, January 11th, 2019 AT 10:36 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It sounds like the throttle bore is dirty I would clean it by disconnecting the battery first. Follow this guide

https://www.2carpros.com/articles/throttle-actuator-service

Roy
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Friday, January 11th, 2019 AT 10:36 AM (Merged)
Tiny
SHARIQ
  • MEMBER
  • 1 POST
After I did the service the car works great again :)
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Friday, January 11th, 2019 AT 10:38 AM

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