Engine Cranks but No Start
#1
Engine Cranks but No Start
2002 Ram 2500 with 5.9 V8 gas.
Ok, so I've replaced darn near everything I can think of. New parts;
PCM - due to other issues
Crank sensor
Cam sensor
Ignition Coil
Distributor Cap
Wires, Plugs
Alternator
Fuel Pump
also cleaned the grounds and replaced some very bad wires.
Still, the darn thing cranks but won't start. It also stopped charging the battery even with the new alternator. However, before I replaced the PCM, it also wasn't getting any fuel.
I'll hopefully have a helper to see if I'm getting any spark but can you guys think of anything else that might be wrong?
I am getting codes P1491 and P0118. I'd take it in to get fixed but geez, the tow bill would be pretty rough.
Any advice would be greatly appreciated
Ok, so I've replaced darn near everything I can think of. New parts;
PCM - due to other issues
Crank sensor
Cam sensor
Ignition Coil
Distributor Cap
Wires, Plugs
Alternator
Fuel Pump
also cleaned the grounds and replaced some very bad wires.
Still, the darn thing cranks but won't start. It also stopped charging the battery even with the new alternator. However, before I replaced the PCM, it also wasn't getting any fuel.
I'll hopefully have a helper to see if I'm getting any spark but can you guys think of anything else that might be wrong?
I am getting codes P1491 and P0118. I'd take it in to get fixed but geez, the tow bill would be pretty rough.
Any advice would be greatly appreciated
#2
#3
Well I was checking everything trying to track down the issues and all the things I replaced were corroded and junky looking. The fuel pump wasn't working but that ended up being the PCM.
I am getting fuel at the rails.
Before the truck stopped, it was stalling while driving at around 50mph with a load.
Then it stalled constantly one day and I was able to limp it close enough to push it into the garage.
I am getting fuel at the rails.
Before the truck stopped, it was stalling while driving at around 50mph with a load.
Then it stalled constantly one day and I was able to limp it close enough to push it into the garage.
#4
My '01 1500 has the same problem.
2002 Ram 2500 with 5.9 V8 gas.
Ok, so I've replaced darn near everything I can think of. New parts;
PCM - due to other issues
Crank sensor
Cam sensor
Ignition Coil
Distributor Cap
Wires, Plugs
Alternator
Fuel Pump
also cleaned the grounds and replaced some very bad wires.
Still, the darn thing cranks but won't start. It also stopped charging the battery even with the new alternator. However, before I replaced the PCM, it also wasn't getting any fuel.
I'll hopefully have a helper to see if I'm getting any spark but can you guys think of anything else that might be wrong?
I am getting codes P1491 and P0118. I'd take it in to get fixed but geez, the tow bill would be pretty rough.
Any advice would be greatly appreciated
Ok, so I've replaced darn near everything I can think of. New parts;
PCM - due to other issues
Crank sensor
Cam sensor
Ignition Coil
Distributor Cap
Wires, Plugs
Alternator
Fuel Pump
also cleaned the grounds and replaced some very bad wires.
Still, the darn thing cranks but won't start. It also stopped charging the battery even with the new alternator. However, before I replaced the PCM, it also wasn't getting any fuel.
I'll hopefully have a helper to see if I'm getting any spark but can you guys think of anything else that might be wrong?
I am getting codes P1491 and P0118. I'd take it in to get fixed but geez, the tow bill would be pretty rough.
Any advice would be greatly appreciated
I would verify if you're getting voltage at the coil during cranking. You should have constant 12V to ground on one side of the connector - you can check between the connector prong and the frame to verify that. Then you can check between both prongs of the connector to see if the voltage pulsates as the engine is cranked.
I wish you luck. Please let us know if you figure it out. I will do the same. I'm looking at getting my truck towed again to the dealer.
#5
Awesome! Thank you for the lead. Just ordered some new testing equipment. I'll definitely check the voltage at the coil.
I'm waiting for the new 140A fuse to get here till I can do more testing. I put a temporary jumper but I'm not sure if that's the right way to go or not.
I just tested the battery tonight and it's good. However, I did find a possibly link to my slow battery drain. The previous owner installed a power inverter under the seat and the wiring job was very amateur... The ground cable was spliced together poorly with tape and corroded. The power cable was just sitting loose at the terminal. It's unhooked now and the cables have been removed. I had some issues this Fall which I'm assuming stemmed from that.
I've also heard of power cables on the harness getting caught or rubbing when the parking brake has been engaged. I looked and sure enough, the main harness is right above the parking brake. What a drag it'll be to check that over. ***On my truck, the mechanic said he was getting a code for a orange and black wire which on my truck is the closest to that parking brake but I've seen where older models were cutting into a Purple/Black wire.
I haven't dug into the harness situation yet... I'm sure that'll feel great on my back.
I'm waiting for the new 140A fuse to get here till I can do more testing. I put a temporary jumper but I'm not sure if that's the right way to go or not.
I just tested the battery tonight and it's good. However, I did find a possibly link to my slow battery drain. The previous owner installed a power inverter under the seat and the wiring job was very amateur... The ground cable was spliced together poorly with tape and corroded. The power cable was just sitting loose at the terminal. It's unhooked now and the cables have been removed. I had some issues this Fall which I'm assuming stemmed from that.
I've also heard of power cables on the harness getting caught or rubbing when the parking brake has been engaged. I looked and sure enough, the main harness is right above the parking brake. What a drag it'll be to check that over. ***On my truck, the mechanic said he was getting a code for a orange and black wire which on my truck is the closest to that parking brake but I've seen where older models were cutting into a Purple/Black wire.
I haven't dug into the harness situation yet... I'm sure that'll feel great on my back.
#6
#7
Yeah, I meant to suggest that the original poster check the ASD - good call. In my case, the mechanic working on my truck jumpered the ASD and still got no voltage at the coil, so no luck there, but it's definitely something for the OP to check.
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#8
Ok, so did some extensive testing today and found that I am getting 12v to one side of the Ignition coil (with key turn) but no power from the computer, should be around 5V. The engine is also chugging slowly and squeeking somewhere, will have to wait for the wife to get home to figure that out. I believe the 12V comes from the ASD side .
Does anyone know the effects of a bad timing chain? I was wondering if the PCM would be able to put out that 5V signal if the chain slipped time or broke. Seems like that crank sensor wouldn't be getting any signal thus no input to the PCM which would cause no signal to turn the Ignition Coil on.
Does anyone know the effects of a bad timing chain? I was wondering if the PCM would be able to put out that 5V signal if the chain slipped time or broke. Seems like that crank sensor wouldn't be getting any signal thus no input to the PCM which would cause no signal to turn the Ignition Coil on.
#9