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Crank but no start

Tiny
BRIAN MOFFETT
  • MEMBER
  • 2001 DODGE RAM
  • 5.2L
  • V8
  • 4WD
  • AUTOMATIC
  • 156,000 MILES
So my symptoms are the dash lights come on but my gauges do not move at all when the key is in the run position. My scanner will not connect to the obd2 connector, the mileage starts flashing. Also, I have three relays that click really load when the key is in the run position they are the ASD, fuel, and the transmission relays. I have replaced the cap and rotor, the ignition coil, and the crank sensor and still the truck will not start. One day the truck ran fine and then two days later the truck would not start. The only other thing I can think of that could be wrong is the computer.
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Wednesday, July 19th, 2017 AT 8:14 PM

18 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,785 POSTS
Hi Brian,

It sounds like you have a voltage or battery cable issue. Can you follow this guide to load test the battery.

https://www.2carpros.com/articles/car-battery-load-test

If it checks out look at the battery to frame grounds to make sure they are in tact.

Lets run the codes to see what come up as well.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run some tests and get back to us we are interested to see what it is.

Cheers, Ken
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Thursday, July 20th, 2017 AT 11:26 AM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
Ok I will do the load test. Also the code reader that I have worked on my other vehicles so the code reader works it just won't connect to my truck for some reason
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Friday, July 21st, 2017 AT 8:50 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,785 POSTS
The most common reason for the code reader not to connect is a blown ECM fuse. Can you please check all fuses to take that out of the equation?

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

Please let us know what you find.

Cheers, Ken
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Friday, July 21st, 2017 AT 10:24 AM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
Yes I will look
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Friday, July 21st, 2017 AT 11:34 AM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
All my fuses are good. The battery load test passed. I'm going to double check all my ground wires to make sure there good
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Friday, July 21st, 2017 AT 11:48 AM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
I cleaned and reconnected all my ground wires that I could see and It still wont start. Also I did a test on my coil pack and the spark I'm getting is red instead of the bluish color that's was before and after I replaced the coil pack
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Friday, July 21st, 2017 AT 1:29 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,785 POSTS
How long of spark is it? Can you take a picture?
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Friday, July 21st, 2017 AT 2:42 PM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
I will do that in about a half hour and try and put some pictures up.
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Friday, July 21st, 2017 AT 2:53 PM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
I couldn't get a picture but the spark would travel about a quarter of an inch but it didn't always spark either
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Friday, July 21st, 2017 AT 4:52 PM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
I also checked to see if I had power to the obd2 connector and I do
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Friday, July 21st, 2017 AT 6:32 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,785 POSTS
It sounds like you have a computer that has gone bad. I would try to get a used one from a wrecking yard,

Please let us know what happens.

Cheers, Ken
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Saturday, July 22nd, 2017 AT 12:08 PM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
That's what I was afraid of. Thank you I will let you know
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Saturday, July 22nd, 2017 AT 2:29 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,785 POSTS
Please let us know what happens, we are interested to see.

Cheers, Ken
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Monday, July 24th, 2017 AT 12:00 PM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
Sorry I had to order a new computer because the wrecking yard around here dont have my pcm in stock. So I get my new part on Wednesday
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Monday, July 24th, 2017 AT 12:39 PM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
Sorry there is some hold up with the part and I still haven't received it
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Wednesday, August 2nd, 2017 AT 9:10 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,785 POSTS
No problem let us know when you get it :)
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Thursday, August 3rd, 2017 AT 10:19 AM
Tiny
BRIAN MOFFETT
  • MEMBER
  • 12 POSTS
I finally received my new pcm for the truck and it fixed all my issues I was having. Thank you for your help.
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Tuesday, August 29th, 2017 AT 9:37 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,785 POSTS
Good to hear, please use 2CarPros anytime we are here to help.

Cheers, Ken
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Wednesday, August 30th, 2017 AT 10:44 AM

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