2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

5.2 magnum ignition coil powered no spark. Stuck in the loop.

Thread Tools
 
Search this Thread
 
Old Mar 28, 2026 | 04:10 AM
  #1  
Dodgedakota99's Avatar
Dodgedakota99
Thread Starter
|
Registered User
Joined: Jul 2024
Posts: 15
Likes: 0
Default 5.2 magnum ignition coil powered no spark. Stuck in the loop.

I have a 1996 Dodge ram 1500 5.2 magnum automatic 46re transmission. I've had the cam crank loss code coming up since I bought the truck last spring. Once it got below zero something failed. It stayed around zero for weeks. But I started with the crank sensor. That didn't work. I then did the fuel pump. Then the Iac valve thinking it was frozen shut. New battery. Finally it got 30 degrees or so out and It started. Drove it for a week and it started not wanting to start. Noticed the cam sensor harness from the engine wasn't stable the truck was shuddering when I moved the harness. This took me forever to happen to wiggle and find the issue. I didn't want to take the distributor cap off and such so I ended up hardwiring the wires without connectors and it ran for a couple weeks. Then wouldn't start at the gas pump. Since then Ive put in another crank sensor two cam sensors because I wasn't sure during testing if it was actually not switching. And now put in a new ignition coil because I can't get spark. I've backprobed the black white wire and the voltage comes on for a sec goes off. Key on goes up and crank it fluctuates from 10.8-12v kind of jumpy on my digital multimeter. So I think my crank and cam sensors are good because of the power and I also backprobed the crank sensor harness and saw it switch from 5 to 0 volts. But I had to stop the crank to see it otherwise it's fast. My PCM seems to be behaving as it should with protection and the asd clicks with key on and pulling the relay in and out. I don't see any fuses out. I'm going to try another new ignition coil and then I'm basically at a new PCM! From what Ive read it's rare for the output drivers to go bad on these and another thread the guy tryed a new computer with the same problem and nothing. The thread ended before the solution and I need it!
 
Reply
Old Mar 28, 2026 | 09:06 AM
  #2  
HeyYou's Avatar
HeyYou
Administrator
Veteran: Air Force
Community Favorite
15 Year Member
Community Builder
Joined: Apr 2010
Posts: 87,267
Likes: 4,197
From: Clayton MI
Default

Cam and crank sensors should get a 5 volt signal, if you are seeing 12 volts on either/both, you have a short somewhere.
 
Reply




All times are GMT -4. The time now is 11:54 PM.