Will not stay running

Tiny
COURTNEY BAILEY
  • MEMBER
  • 2002 MITSUBISHI MONTERO
  • 3.0L
  • 3 CYL
  • 2WD
  • AUTOMATIC
  • 200,430 MILES
I have the vehicle listed above it is the Sport model. One day while I was driving the vehicle shut off. It would crank up but would not stay running. (Had to be towed). But previously it was acting up days before like it was losing power. So we bought a fuel filter that did not did not help. Tested the fuel pump it works but It is not getting fire back there. Any ideas? It will crank up but only stay running for a couple of seconds or sometimes until you give it gas. Could it be the fuel relay? Please help! Thanks.
Wednesday, January 3rd, 2018 AT 1:18 PM

16 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,251 POSTS
Hello,

It does sounds like the fuel pump and I will find the location no problem. Can you double check the year please my information does not show a Montero in 2012?

Cheers, Ken
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Thursday, January 4th, 2018 AT 3:50 PM
Tiny
COURTNEY BAILEY
  • MEMBER
  • 20 POSTS
We checked the fuel pump it works by checking it direct, but we are not getting any fire back there to the fuel pump.
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Thursday, January 4th, 2018 AT 6:42 PM
Tiny
COURTNEY BAILEY
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Sorry the year model is 2002!
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Thursday, January 4th, 2018 AT 6:44 PM
Tiny
COURTNEY BAILEY
  • MEMBER
  • 20 POSTS
It cannot be the fuel pump because it works, just not working in the back because there is not any power going to the fuel pump. But recently before it quit I had a programmed key that broke and I just taped my spare an the chip together. Was thinking could that be a possibility why it might not be getting power some sort of way back there to the fuel pump. Thanks
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Thursday, January 4th, 2018 AT 6:49 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Hi Courtney,

Yes, the chip can cause the issue. Is there a security light flashing when you try and start the car? Here is a wiring diagram of the fuel pump and engine to help us see what's going on.

I would check all system fuses here is a guide to help.

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

There is also a PCM relay that I would check as well.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Friday, January 5th, 2018 AT 11:51 AM
Tiny
COURTNEY BAILEY
  • MEMBER
  • 20 POSTS
No the security light is not flashing. All the fuses seem to have power to them. They were all hot. A month before when we broke the key and tried the spare key the security light was flashing. But when we taped it around the spare key it crank right up and was driving it. However, weeks later it just shut off going down the road and now is not getting any fire to the fuel pump. Thanks for your time!
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Friday, January 5th, 2018 AT 12:24 PM
Tiny
KEN L
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This makes me think the PCM relay can be the culprit. Can you please test for power and check the relay operation?
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Friday, January 5th, 2018 AT 12:30 PM
Tiny
COURTNEY BAILEY
  • MEMBER
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PCM fuse is hot. An all the other fuses are too.
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Monday, January 8th, 2018 AT 3:12 PM
Tiny
COURTNEY BAILEY
  • MEMBER
  • 20 POSTS
My dad is saying that one wire coming off the fuel pump is hot but the other one isn't. Any other suggestions? Thanks for the help
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Monday, January 8th, 2018 AT 9:58 PM
Tiny
KEN L
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I would check fuse fL3 and f10 in the fuse panel also try and replacing the relay for the fuse pump. The locations are in the post above click the images below.
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Tuesday, January 9th, 2018 AT 1:12 PM
Tiny
COURTNEY BAILEY
  • MEMBER
  • 20 POSTS
A friend mentioned the knock sensor. Could that be true. What's your opinion? Thanks
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Sunday, February 4th, 2018 AT 11:46 AM
Tiny
KEN L
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If the crankshaft sensor has failed it will not turn the fuel pump on. Can you turn the engine over and check for spark?

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please let us know what happens.

Cheers, Ken
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Monday, February 5th, 2018 AT 10:41 AM
Tiny
COURTNEY BAILEY
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Thank you so much for your time
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Sunday, March 11th, 2018 AT 10:31 PM
Tiny
KEN L
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No problem we are here to help, can you tell me if you got the problem fixed or?
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Monday, March 12th, 2018 AT 11:34 AM
Tiny
COURTNEY BAILEY
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  • 20 POSTS
We fixed it. It was the camshaft sensor.
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Monday, March 12th, 2018 AT 9:02 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Tuesday, March 13th, 2018 AT 10:49 AM

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