1989 Dodge RAM B350 stalls (318cui)
#12
So. A little update. Finally got the pump inside the tank and the tank back up and connected. The battery had lost some of it's charge and it didn't seem enough to start the Dodge. Got a charger connected and started it up fine. Left the car running for 10-15 minutes and it worked like a charm. I thought the problem was solved.
Left the car charging in the garage and went home for two hours. Just a short while ago I went out again to start it up and get it home. It just kept cranking but nothing happened. Tried engaging the fuel pump a few times by turning the ignition but not cranking it but still no change.
After maybe 20 attempts it fired up without problem. Ran for 3 minutes and then shut right down again. So, new fuel pump does not solve the problem.
After this it would crank forever but not start. I removed one of the spark plug wires from the engine and placed it right on the valve cover, as I understand, it would produce a spark when turning ignition this way? (I know it might not be recommended, but just a quick test). However, no spark appeared so I suspect that something happens to shut down the distributor, I do not think it's related to lack of fuel.
I think these are the next things to change in order of possibility to solve the problem:
SMEC
Hall effect sensor in distributor
ASD(Auto Shutdown relay)
Camshaft sensor
Crankshaft sensor
Any thoughts?
Left the car charging in the garage and went home for two hours. Just a short while ago I went out again to start it up and get it home. It just kept cranking but nothing happened. Tried engaging the fuel pump a few times by turning the ignition but not cranking it but still no change.
After maybe 20 attempts it fired up without problem. Ran for 3 minutes and then shut right down again. So, new fuel pump does not solve the problem.
After this it would crank forever but not start. I removed one of the spark plug wires from the engine and placed it right on the valve cover, as I understand, it would produce a spark when turning ignition this way? (I know it might not be recommended, but just a quick test). However, no spark appeared so I suspect that something happens to shut down the distributor, I do not think it's related to lack of fuel.
I think these are the next things to change in order of possibility to solve the problem:
SMEC
Hall effect sensor in distributor
ASD(Auto Shutdown relay)
Camshaft sensor
Crankshaft sensor
Any thoughts?
#13
On an '89 the hall effect sensor in the distributor is both the cam and crank sensor.
The asd relay shuts down both spark and fuel. It is located behind the battery on the firewall. You can cut a short length of wire and stick it in the connector bridging the two fatter wires to bypass it.
The asd relay shuts down both spark and fuel. It is located behind the battery on the firewall. You can cut a short length of wire and stick it in the connector bridging the two fatter wires to bypass it.
#14
On an '89 the hall effect sensor in the distributor is both the cam and crank sensor.
The asd relay shuts down both spark and fuel. It is located behind the battery on the firewall. You can cut a short length of wire and stick it in the connector bridging the two fatter wires to bypass it.
The asd relay shuts down both spark and fuel. It is located behind the battery on the firewall. You can cut a short length of wire and stick it in the connector bridging the two fatter wires to bypass it.
I would assume(not in any way knowing alot about electrics) that the relay is fed with current as soon as you start the car and thus "open"? If computer is faulty or recieves a faulty signal from the hall effect sensor, it will stop the voltage to the asd relay, closing it and thus shutting down spark and fuel?
Or is it the other way around, the relay is not fed with current and thus opened at all times until computer tells it that something is wrong, feeding it with current to shut it?
What happens when I bridge the two fat wires in relation to how the relay works? Does this mean the entire function of the relay is bypassed and current is free to flow at all times? Does this mean spark, and more importantly, fuel pump is active at all times possibly causing other problems then I currently have?
I apologize for my lack of knowledge.
#15
With the ASD relay bypassed, the fuel pump will run continuously. I recommended it only to diagnose it as the issue, or so that you can drive home.
If this works, disconnect jumper wire when you shut off engine or you can burn out the coil and run down the battery.
If this works, disconnect jumper wire when you shut off engine or you can burn out the coil and run down the battery.
Last edited by landyacht318; 09-05-2012 at 08:36 AM.
#16
I would assume(not in any way knowing alot about electrics) that the relay is fed with current as soon as you start the car and thus "open"? If computer is faulty or receives a faulty signal from the hall effect sensor, it will stop the voltage to the asd relay, closing it and thus shutting down spark and fuel?
#17
The crank sensor is used for ignition timing and generating a spark pulse. Since you have no spark, I would first suspect the ignition coil or the crank sensor.
#19
#20