Engine will turn over but no spark?

Tiny
VISHOUSELECTRIC
  • MEMBER
  • 2 POSTS
It cranks but nothing else
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Monday, July 6th, 2020 AT 1:39 PM (Merged)
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Yes the key needs to be on to check for voltage. Here is what I need to know. Is there power to the black wire with the gray stripe at the coil? Is there power coming from the dk green wire orange stripe coming from the coil? Does the gray wire with the black stripe have power at the cranksensor? Now I need to know if there is power to the black wire with the dk green stripe at the shut down relay? Get back to me with what you find. If any of these don't have power then we need to check the powertrain control module (computer). It may not be sending the signal.
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Monday, July 6th, 2020 AT 1:39 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,696 POSTS
If the wiring to the PCM is good, I recommend removing the PCM and having it checked.
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Monday, July 6th, 2020 AT 1:39 PM (Merged)
Tiny
HILBILY89
  • MEMBER
  • 1 POST
  • 1997 DODGE RAM
  • 5.9L
  • V8
  • 4WD
  • AUTOMATIC
  • 252,000 MILES
I drove it home this past Thursday and parked it. Went to start it on Saturday and it wouldn't start. I'eve replaced the fuel pump, coil, cam sensor, crank sensor, rotor cap and button and the computer. I have zero spark to the coil. I'eve checked all fuses, grounds and solenoids and everything is showing to be good. I'm getting gas to the throttle body the motor turns over fine but no spark. No backfires spits or sputters. Pulled a spark plug wire and with a screwdriver held it near ground to check for fire and no results. I don't know what else to check.
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Monday, July 6th, 2020 AT 1:39 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,696 POSTS
Okay, this is a tough one since you replaced so much already. However, have you checked to make sure none of the main fuses under the hood are bad? Also, have you checked the ASD in the power distribution box under the hood?
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Monday, July 6th, 2020 AT 1:39 PM (Merged)
Tiny
DAVID BURROW
  • MEMBER
  • 1 POST
  • 1997 DODGE RAM
  • 5.9L
  • V8
  • 4WD
  • AUTOMATIC
  • 260,000 MILES
Two weeks ago I driving the truck and hit a bump and it went into a death wobble. I kept the truck under control but lost all power. Got pulled over and tried to start it and nothing. Keep in mind a week prior I replaced the fuel pump. (A year ago) So the first thing I checked was all fuses and my ground on the battery. Everything is good. Then checked wires to the starter. Everything good. Still no start. Got a friend to pull it four miles back to my house. I changed the ignition coil, nothing. Then I took my test light to all the fuses. When I got to the one in dash panel that is the engine fuse. It is good but no power to it. I can take a jumper wire from that fuse to the battery then it light up. Still no start. Replaced distributor and rotor, nothing. My only other option is the crankshaft sensor. Any ideas on what else it could be?
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Monday, July 6th, 2020 AT 1:39 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,606 POSTS
Try a security system reset first then replace the crank sensor. but if it quit you should check all your grounds as well as battery sounds like something is disconnected. See link.
https://www.2carpros.com/articles/how-to-reset-a-security-system
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Monday, July 6th, 2020 AT 1:39 PM (Merged)

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