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Engine shuts off while driving

Tiny
BIGDADDYLEE57
  • MEMBER
  • 2002 DODGE NEON
  • 2.0L
  • 4 CYL
  • 2WD
  • MANUAL
  • 275,000 MILES
Couple of off and on's then it's good.A Caradiodoc man has been working with me. My last resort he said can't rule it out is check the dowel on the cam shaft. It was good. Compression in #1 160 2, 3, 4 had 180. All back together and no spark? New crank sensor, cam sensor, ignition switch.
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Monday, March 9th, 2020 AT 3:33 PM

17 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

This vehicle has an auto shut down system. The Automatic Shutdown (ASD) relay supplies battery voltage to the fuel injectors, electronic ignition coil and the heating elements in the oxygen sensors. Have you checked fuel for an injector pulse?

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

The ASD relay is in the power distribution box under the hood. I would check to make sure it is working. Also, confirm the ignition run fuse is good. In addition to just checking the fuse, make sure there is power. I attached a pic of showing both the relay and the fuse and how they are located in the power distribution box.

Here are a few links you may find helpful:

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

and

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

Check this below and let me know what you find.
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
  • MEMBER
  • 36 POSTS
Hello Joe, I had did all that before, but not the injectors. So know I'm starting all over again from the beginning. This time checking from the ignition switch and all the wiring, checking voltage and resistance CKP sensor, cam sensor and the PCM. So this is quite the job, it is going to take some time. I'll keep in touch. Thank for all the information and links. You are a very nice person for taking the time to try to help me figure this out. Thanks lots, Lee
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
You are very welcome. I don't feel as though I helped. Please keep me in the loop and let me know if I can help in some way. Lee, have you checked the ignition switch itself?

Let me know.
Joe
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
  • MEMBER
  • 36 POSTS
I've been testing crank sensor with key on. It test 8.73 volts on the orange wire. When I test the same
wire for resistance ohms I get 08.9 at multi-meter on 200 the other two wires test at 0.00. How much resistance makes a wire no good? Checked all the fusses they are good. He ignition switch is new, the crank sensor new, cam sensor new. I am checking my injectors . Meter set on 20VDC I sure don't have 12 v not even close maybe 4 sum nothing at all. What do you think of that? Hmm. Thank you very much for your time I sure do appreciate It. Lee
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

Resistance is based on wire length. You appear to be fine with that. You indicated you don't get 12v. Maybe 4 on some, nothing at all. Which wires are you referring to?
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
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  • 36 POSTS
Oops, fuel injectors. I think I forgot to plug in the creak sensor. That is probably why the fuel injectors don't work and the car wont turn over.
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Ha! No problem. Are you checking with the engine being cranked over? The injectors receive 12v at all time. However, the circuit isn't completed until the PCM provides a ground path to each one. You need to go back to the PCM to see if there is corrosion, damage to wiring, and so on to determine why there is no voltage.

I attached 3 pics. Make sure you are checking the correct wires for power. Also, the highlighted wires go to the PCM (Pic 3). Check those connections.

Let me know what you find.
Joe
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
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  • 36 POSTS
Hi, went through all 4 injectors tested for continuity all the wire s are good to through the connector that hooks the main box (PCM) No power coming out of the PCM computer. Darn that's why I don't have spark. Ha?
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
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  • 36 POSTS
Got another PCM coming next week.
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
JACOBANDNICKOLAS
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Sounds like a plan. Let me know if it takes care of the problem.

Take care and enjoy the weekend.

Joe
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
  • MEMBER
  • 36 POSTS
Got me a lemon ha ha lol the color. Well put in the used new computer The car is yellow and no start even got a brand new coil. And nothing turns over good. You can hear the fuel pump turn on in the gas tank. The fuses are good. I checked the grounds on the injectors. They are grounded, I'm thinking it has got be a power wire not working, but where? Can't go anywhere because of the cron 19. Are you in lock down? I'm in Rochester, Minnesota Sunday the whole state will be Quarantine.
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
No locked down yet here in Pittsburgh. I suspect it may be coming.

Are there still no trouble codes? And I know you said it was all checked before, but the ASD relay still is getting my attention. Body grounds? Ugh! Got to love cars.

If you look at picture 3, check the ground I circled. Also, picture 1 shows a splice to the crank and cam sensors that could be an issue and picture 2 shows where the signal for the cam and crank sensors are located on the PCM.

Joe
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
  • MEMBER
  • 36 POSTS
Put the new used computer in and it worked great Except the key didn't match the PCM. So the car only would run 5 seconds and shut off. I new that the VIN of the car needs to be entered the PCM for it to run. I guess we tried one, to many times to start the car, Because the car was dead at the starter. OO Then for the heck of it I put in the old one and the car started right up I tried it two more times and it worked. The car ran. I think their is some thing in the computer that got reset because it was out of the car for a good day or so. I left it sit in the driveway I haven't took it for a ride yet. Going to do that later this week.
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
JACOBANDNICKOLAS
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Hi,

I have a feeling that disconnecting and reconnecting the computer may have cleaned off corrosion or something causing a bad connection. Let me know how the ride goes for you. I hope that is all it was.

Joe
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
  • MEMBER
  • 36 POSTS
Went for a ride today, What a joke ! The PCM started to act up not running right and wanting to rev up more than I would let the motor go So I shut it off. Pushed the car home, and tried to start it up and totally dead. I shook the PCM back and forth and it would want to start up but run very ruff going to get a bran new PCM/EMC From All Computers Resources, All programmed will keep in touch. Thanks for everything. Lee
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Lee, you are very welcome. If you get a chance, let me know the end results. And just reconfirm, there are no trouble codes when checked?
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Friday, April 16th, 2021 AT 1:03 PM
Tiny
BIGDADDYLEE57
  • MEMBER
  • 36 POSTS
Well, Lets see, I went to Geeks Parts, on line. Bought me A brand new PCM For my car. Had to get it programmed to my VIN and every thing is all good. Been driving all over the place and no stalls. The PCM was $212.00 and $95.00 core charge. $100.00 to program it. Got my $95.00 back. The car runs very good Thank you for all the good help. I really appreciate it. Thanks, Lee
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Friday, April 16th, 2021 AT 1:03 PM

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