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1998 Ram v10 no spark

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1998 Ram v10 no spark

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  #1  
Old 07-22-2018, 10:07 PM
_itsjavio
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Default 1998 Ram v10 no spark

i have a 98 Ram no spark it cranks but no spark. The asd relay and the fuel pump relay both work as they could. Asd has 12v at pin 30 . I suspected crank sensor even though I tested old one and it had correct voltage. But after new pine went in still no spark. I check power wire to coil packs and has 12v for about 3 seconds then when I crank voltage is present again. So I suspected the coils were bad did a resistance check and they were good, but still went ahead and ordered new ones and installed and still same issue NO SPARK. 😑 so I then checked all relays and fuses and 30 amp engine control 1 fuse was blown so I replaced with new one. ASD and FUEL PUMP relays still click on when supposed to. I checked fuel pressure and itís at about 45psi. Anyone have any suggestions I could try? Please and thanks in advanced
 
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Old 07-23-2018, 01:25 AM
kman4443
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I wish I knew, my 2000 with a 5.2 is doing the same thing.
 
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Old 07-23-2018, 03:18 AM
MoparFanatic21
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Originally Posted by _itsjavio View Post
i have a 98 Ram no spark it cranks but no spark. The asd relay and the fuel pump relay both work as they could. Asd has 12v at pin 30 . I suspected crank sensor even though I tested old one and it had correct voltage. But after new pine went in still no spark. I check power wire to coil packs and has 12v for about 3 seconds then when I crank voltage is present again. So I suspected the coils were bad did a resistance check and they were good, but still went ahead and ordered new ones and installed and still same issue NO SPARK. 😑 so I then checked all relays and fuses and 30 amp engine control 1 fuse was blown so I replaced with new one. ASD and FUEL PUMP relays still click on when supposed to. I checked fuel pressure and itís at about 45psi. Anyone have any suggestions I could try? Please and thanks in advanced
Originally Posted by kman4443 View Post
I wish I knew, my 2000 with a 5.2 is doing the same thing.
The ignition system on these trucks are really simple. You have sensors that signal when to for the coil an then the coil goes to the distributor or plugs. If everything else checked it good you either have a wiring issue or bad pcm
 
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Old 07-23-2018, 07:45 PM
_itsjavio
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Even if Iím getting power to the coil just not out? Also even if crank s nose is doing its job and I have injector pulse?
 
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Old 07-23-2018, 08:10 PM
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Originally Posted by _itsjavio View Post
Even if Iím getting power to the coil just not out? Also even if crank s nose is doing its job and I have injector pulse?
If you get injector pulse and power to the coil then it's not your PCM that would mean your coils are bad. Basically how it works is PCM gets a signal from the crank sensor which sends it to the coil and then the coil distributes that power to the cylinders. Also is fires the injectors
 
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Old 07-23-2018, 08:55 PM
_itsjavio
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The thing about the coils is i checked the resistance on the coils and all checks out perfect but I still went and bought new ones and still same resistance but nothing
 
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Old 07-23-2018, 08:57 PM
_itsjavio
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Originally Posted by kman4443 View Post
I wish I knew, my 2000 with a 5.2 is doing the same thing.
hey you should make sure all of your spark plug wires are in the right firing order on the distributor, I bought a 2000 1500 sport with no spark issue and it happened to be all the wires were misplaced and wasnít firing where it needed to be.
 
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Old 07-24-2018, 07:36 AM
kman4443
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I have the same problem I will have to check these things as well, when it stops raining long enough for me to do so. My truck has a new crank sensor, cam sensor, coil, and the pcm was replaced last year. Its showing no trouble codes.
 
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Old 07-25-2018, 01:13 PM
kman4443
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Originally Posted by _itsjavio View Post

hey you should make sure all of your spark plug wires are in the right firing order on the distributor, I bought a 2000 1500 sport with no spark issue and it happened to be all the wires were misplaced and wasnít firing where it needed to be.
But you would still get spark from the plug wires, assuming the coil was connected correctly and the wires to the cylinders were wrong. A spark wire tester would show this. Mine ran on starting fluid before it had a no spark issue.
 
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Old 07-25-2018, 01:49 PM
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Originally Posted by kman4443 View Post
But you would still get spark from the plug wires, assuming the coil was connected correctly and the wires to the cylinders were wrong. A spark wire tester would show this. Mine ran on starting fluid before it had a no spark issue.
You have to have a wiring issue somewhere
 
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