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Amedee, Dodge Technician
Category: Dodge
Satisfied Customers: 24120
Experience:  ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
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2004 dodge ram 1500: 4x4..oil pressure dropped..accelerating..brakes

Resolved Question:

I have a 2004 dodge ram 1500 5.7 4x4. On the way to work this morning the oil pressure dropped to 0 when I pushed the breaks then shot up to normal when accelerating and stayed normal until brakes were applied. I checked the oil it was a quart low, put oil in it. Now it won't crank, turns over but not starting.
Submitted: 4 years ago.
Category: Dodge
Expert:  Amedee replied 4 years ago.

Does the check engine light come on with the key on?

Does the engine have spark when cranking it over?
Customer: replied 4 years ago.
No. It started for a few seconds then shut down I'm not able to check for fire until I get home.
Expert:  Amedee replied 4 years ago.
Ok.. if the engine has spark, check to see if it runs on starting fluid.

Also, be sure there are no anti theft or security lights on or flashing on the dash.

Let me know what your find!
Customer: replied 4 years ago.
Did not crank with starting fluid. The only light that comes on is a little lighting bolt in the bottom right. I have no anti theft remote.
Expert:  Amedee replied 4 years ago.
Does the engine have spark when cranking it over?
Customer: replied 4 years ago.
I dont have any way to check it. I'm by my self. If it doesn't crank with starting fluid there's no fire?
Expert:  Amedee replied 4 years ago.
The first thing to do is to be sure the computer is awake. Turn the key on and check reference voltage to the tps, cam and crank sensors. If there is full reference voltage, check to be sure the ASD relay is engaging when trying to start the engine and that there is power to the injectors and coil/coils when cranking. IF there is no power to the injectors or coil when cranking and the ASD relay is not engaging, then we might have a bad cam or crank sensor (or a valve timing issue).

If there is no reference voltage to these sensors with the key on, then the computer might not be waking up. We will need to check all powers and grounds going into the computer with the key on. This includes, all powers through the computer fuses, fusible links and even the ignition switch.

Hint: Sometimes the cam and crank sensors can short out and pull the computer down temporarily. If all powers and grounds check out and we still do not have any reference voltage to the cam, crank or the tps, then disconnect them one by one with the key on to see if the reference voltage comes back. If so, then one of the sensors is bad and will need to be replaced.
Customer: replied 4 years ago.
Ok will check into that. I noticed I spilled a little oil on the front driver side coil pack it ran down in it could that be my problem?
Expert:  Amedee replied 4 years ago.
Usually that does not cause a no start condition.

I hope this helps! Please don't forget hit the green accept button so that I may get credit for the time that I have spent with you. This is necessary for me to be paid for my work and get credit for assisting you. Your question will not close, and you will still have the opportunity to follow-up if needed. Leaving a bonus and positive feedback is not required, but doing so is certainly appreciated!

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Thanks in advance!

Best Regards

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