× Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

DodgeDad needs help with trying to get a truck to run

  • DodgeDad
  • Topic Author
  • Offline
  • New Member
  • New Member
More
04 Jun 2019 21:09 #30375 by DodgeDad
I have a 1999 Dodge 1500 Pickup 5.2L that cranks but doesn't start, and the coil has an intermittent spark.

I could use some help in fixing this problem.

Any ideas?

-DodgeGuy

Please Log in or Create an account to join the conversation.

More
04 Jun 2019 22:24 - 04 Jun 2019 23:37 #30379 by John Curtis
Do you need a wiring diagram?
Do you have cam and crank signal?

check is if the fuel pump is turning on. Can you hear it?
Possible PDC failure? Try a bypass test?

Is this a 4 pin COP?

Have you checked for 5V ref?

I’ve included an attachment. Which one is yours?

Thinking out loud always helps me in the process.
Attachments:
Last edit: 04 Jun 2019 23:37 by John Curtis.
The following user(s) said Thank You: chief eaglebear

Please Log in or Create an account to join the conversation.

More
04 Jun 2019 22:47 #30380 by csipes1983..
I spent several days troubleshooting my intermittent spark. Everything from ICM signal wire, grounds, voltages, ohm reading on the coil, you name it. One day I was using my test light to check for the spark signal from the ICM while cranking the engine, and the vehicle abruptly started and scared the hell out me (thought I was getting electrocuted!). Turns out it was the harness connector to the ICM that was making intermittent contact with the connector pins on the ICM at the crank signal wire. Sure enough I pulled the harness off and examined the connector openings, and they were too wide. I went ahead and spliced in a new and the vehicle has not had cranking issues ever since. I learned an important lesson that day, don't over look the simple things! Good luck.
The following user(s) said Thank You: DodgeDad

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
05 Jun 2019 10:47 #30408 by Tyler
Does the coil have power and control during the no spark condition? Knowing which you're missing will help point you in the right direction.

My experience with these trucks is that the coil housing cracks and leaks secondary voltage to ground. An easy check for this is to get the truck running, then mist the coil with a spray bottle. If the truck dies, you're on the right track.
The following user(s) said Thank You: DodgeDad

Please Log in or Create an account to join the conversation.

  • DodgeDad
  • Topic Author
  • Offline
  • New Member
  • New Member
More
05 Jun 2019 11:51 #30410 by DodgeDad
Hi - old guy here. I have an Dodge Laramie 1500. Could I get a copy of the wiring diagram. The truck hasn't been licensed since 2013 and not sure when it ran last as I just picked it up at a deal. I was going to use it for parts but now think it's better than the car I have. I can follow a wiring diagram but vague on how to test it. Any thoughts?

Please Log in or Create an account to join the conversation.

  • Tyler
  • Tyler's Avatar
  • Offline
  • Moderator
  • Moderator
  • Letting the magic smoke out since 2011
More
05 Jun 2019 13:03 #30415 by Tyler

DodgeDad wrote: Hi - old guy here. I have an Dodge Laramie 1500. Could I get a copy of the wiring diagram. The truck hasn't been licensed since 2013 and not sure when it ran last as I just picked it up at a deal. I was going to use it for parts but now think it's better than the car I have. I can follow a wiring diagram but vague on how to test it. Any thoughts?


Gotcha right here:



An incandescent test light would be preferable, but we can make a DMM work, too. ;) Test light connected to B-, the dark green/orange wire should light the bulb during cranking. If that's there, move to the black/grey wire and change the test light to B+. Crank it again and look for rapid pulsing of the bulb.

This SD video demonstrates pretty well what to look for:

Attachments:
The following user(s) said Thank You: DodgeDad

Please Log in or Create an account to join the conversation.

More
05 Jun 2019 15:27 #30418 by chief eaglebear
Replied by chief eaglebear on topic DodgeDad needs help with trying to get a truck to run
excellent rundown of no start possiblitys

Please Log in or Create an account to join the conversation.

  • DodgeDad
  • Topic Author
  • Offline
  • New Member
  • New Member
More
24 Jun 2019 11:12 #31006 by DodgeDad
Hi - DodgeDad here

I did the test, and this is what I found.

When testing the green/orange wire, the light stays on only when the fuel pump is on. There is no light on cranking.
I tested the black wire and there was no light at all.

Where do I go from here?

Thanks,

-DodgeDad

Please Log in or Create an account to join the conversation.

More
01 Jul 2019 01:11 #31277 by shaggyraider
this is same thing I have my 98 1500 5.9 did they give a next step?

Please Log in or Create an account to join the conversation.

More
01 Jul 2019 01:13 #31278 by shaggyraider
need same thing please

Please Log in or Create an account to join the conversation.

  • DodgeDad
  • Topic Author
  • Offline
  • New Member
  • New Member
More
01 Jul 2019 17:44 #31297 by DodgeDad
Doge dad/ have not got an answer yet

Please Log in or Create an account to join the conversation.

More
02 Jul 2019 09:13 #31321 by jreardon
The pcm provides a ground on connector C3, pin 3 (dark blu/yellow) when ignition is turn to RUN position FOR 1 SECOND.

So for 1 second, in the run or start position, you should have power at the coil. Do you?

If PCM does not receive a CMP and CKP sensor signal within one second of engine cranking (start-up), it will turn this ground off.

If you don't have this power for 1 second at the coil, check for a ground at the PCM, connector 3. Pcm should provide ground for 1 second when ignition switch is turned to run position. Now if this ground doesn't stay put, now go chase the cam and crank sensors.

What DTC codes do you have? I'm going to guess it's related to cam and crank. Did you test those sensors?





The following user(s) said Thank You: Noah

Please Log in or Create an account to join the conversation.

  • DodgeDad
  • Topic Author
  • Offline
  • New Member
  • New Member
More
20 Jul 2019 14:09 #32000 by DodgeDad
Since my last post I've done all the checks, replaced the crankshaft positioning sensor (because the old one was all rusty), and then it tried to run, but only if I poured gas down it. So then I took the gas tank out and replaced the fuel pump and cleaned the fuel tank. Now I don't hear the fuel pump (maybe the new one is bad?) so I installed an in-line fuel pump to bring more pressure, but it's still not running. Injectors?? How to test? And how could all of them be bad?

Please Log in or Create an account to join the conversation.

  • DodgeDad
  • Topic Author
  • Offline
  • New Member
  • New Member
More
02 Aug 2019 10:53 #32364 by DodgeDad
Previous Post - www.scannerdanner.com/forum/post-your-re...tent-coil-spark.html

I am making a new topic so that hopefully I can have some questions answered. Since my last post I have replaced the crank shaft positioning sensor, the cam shaft positioning sensor or "coil pickup", and it still won't start. It won't run unless I pour gas down it.

All I have is a test light and a volt meter, where to I go from here?

-DodgeDad

Please Log in or Create an account to join the conversation.

  • Noah
  • Noah's Avatar
  • Offline
  • Moderator
  • Moderator
  • Massachusetts, USA
More
02 Aug 2019 11:32 #32365 by Noah
Hey Dodge Dad,
Just read your previous thread. So is it safe to say that the intermittent spark issue is resolved since you can start the engine with an external fuel source?
Looks to me like it's time to investigate the fuel system a little more closely. I see you've changed the pump and added an in line pump. Do you have a way to check fuel pressure? There should be a Schrader valve on the fuel rail that you can tap a fuel gauge into. If you do not have a gauge many parts stores will loan them out with a deposit.
As a quick and dirty, (and kind of dangerous) check you can press the pin in the Schrader valve with a pocket screwdriver and fuel should spray out. Obviously take precaution to not get injured or start a fire.
Injectors control is also suspect, in this video Paul shows how to check for injector control using only a test light.

It's about 14:25 where he shows how to identify the control wire and check for computer control.
That's where I'd start any way: verify fuel pressure and injector pulse.

"Learn, apply, repeat."
The following user(s) said Thank You: PDM

Please Log in or Create an account to join the conversation.

  • DodgeDad
  • Topic Author
  • Offline
  • New Member
  • New Member
More
05 Aug 2019 11:07 #32506 by DodgeDad
Thank you for responding so quickly.

I have tested the fuel pressure and it's about 50+ psi

I tested the injectors and on the Green/Orange striped wire the light will come on when the pump is on for about 3 seconds.

On the yellow wire the light doesn't come on at all even while cranking.

What should I do next?

Thanks,

DodgeDad

Please Log in or Create an account to join the conversation.

More
05 Aug 2019 20:41 #32520 by tim.smith1
When you checked the yellow wire is your test light on ground or positive?
The following user(s) said Thank You: Noah

Please Log in or Create an account to join the conversation.

  • Not Allowed: to create new topic.
  • Not Allowed: to reply.
  • Not Allowed: to add attachements.
  • Not Allowed: to edit your message.
Time to create page: 0.845 seconds