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dodge ram starts but no crank
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southernbeauty731972
New User
Jun 19, 2015, 4:54 PM
Post #1 of 3
(1490 views)
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dodge ram starts but no crank
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i have a 2003 dodge ram slt 5.9L... i was driving and heard loud pop from rear exhaust then lost all power now it will start but not crank... any suggestions on what it could be?? i have changed crank and cam sensors and distribitor cap and rotory but still no luck. only starts with no crank... have check does not have a spark. not getting any fire
(This post was edited by southernbeauty731972 on Jun 19, 2015, 4:56 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 19, 2015, 5:27 PM
Post #2 of 3
(1478 views)
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Re: dodge ram starts but no crank
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Your truck Cranks but doesn't start.
You need to run a few more tests
All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.
Every engine requires spark, fuel and compression to run. That's what we have to look for.
These are the basics that need to be tested and will give us the info required to isolate a cause.
1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.
2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.
3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.
4) If all of these things check good, then you would need to do a complete compression test.
Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jun 19, 2015, 6:17 PM
Post #3 of 3
(1473 views)
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Re: dodge ram starts but no crank
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Does the check engine light come on when you turn the ignition to run? Also check to see if there are any trouble codes stored in the PCM. Write down any code numbers.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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