no start

It sounds like there may be an issue with the PCM as it controls most of these functions. Do you have a scan tool to look at information?

Roy

No, will the rental one from auto zone work and what should I be looking for?

You will need to be sure you can communicate. Make sure you can communicate with the instrument cluster, body and engine. You should be able to look at sensor values.

Roy

Okay, also at times I have to press the gas pedal in order for it to start. Maybe all my problems are tied to the PCM.

Yes, this is very possible.

Roy

When I connect the scanner am I looking to see if the sensors are working or what am I actually looking for? Also, does my truck have an impact sensor that would disable starting or would it disable everything?

No impact sensor.

You need to make sure the PCM is communicating first before looking for specific values.

Roy

Okay thanks.

AutoZone's tool only reads codes. Any other ideas?

It is the only way to see if it is working. You may need to take it to a shop to have it verified.

Roy

I plugged in the diagnostics tool and it said cannot connect. So I pulled the PCM fuse and and did the PCM reset procedure after that everything worked fine truck runs now. Last time I disconnected all the power it started up. What do you think?

You should not have to reset the PCM. The PCM sounds like it has an issue. It will happen again. One time, resetting will not work and will leave you stranded.

Roy

So would it be a safe bet to replace the PCM?

Yes, you will need a new PCM and have it flashed to your truck.

Roy

I was going to order one from allcomputerresources.com, they ask for the VIN number so I am guessing they flash the PCM before they ship it so it is ready to go.

Make sure it will be flashed. If not, it will not run at all.

Roy

Thanks for everything hopefully this is it.

I parked my truck with half a tank and came to start it tried and noticed it was empty. Filled up back to half tank and it would not start. I primed throttle body with gas and it runs for a second. Swapped fuel relays and no change.
I need some information on what may be the cause and how I can be sure the fuel rails have gas and the injectors are primed .
I know this may not be just a simple problem and more diagnostics may be needed.
My best friend that was a ASE Master in all categories passed away and my mechanic abilities are limited to about 2000. I was his electrical tech and computer geek and he was my car encyclopedia and Ham radio guru.
Well thanks and any information will help.
2005 4.7 ltr.

I have found that many times when the fuel tank is empty, the pump sucks up dirt and it either ruins the pump or pluggs the fuel filter.

What you need to do is check fuel pump pressure to the fuel rail. Here is both a how to video and step by step instructions for checking it. Check it out and let me know what you find. Also, you will need a gauge. They sell them on the site here or many parts stores will lend or rent them. If you have to rent one, you may be better off purchasing one so you have it for the future.

Regardless, let me know what you find as far as pressure, the exact size of the engine you have and then I can check what the pressure should be to determine if you are wthin spec.

Joe

My starter will not turn when I go to start my truck after driving it unless I reset my PCM. Also, my fuel and volt gauge will not work either. Do I have a ground issue or a faulty PCM?

Scan for codes it may be a integrated power module problem.

There are no codes.

if a pro has not scanned this then the scanner you are using will not pick these codes up. Most auto parts scanners will only pick up engine and transmission codes . Some others at auto parts will pick up ABS as well but none of the the other many modules that are installed on a vehicle. Your starter circuit goes through the integrated power module and if it will not send a signal to PCM like the anti theft circuit the truck will not start. Regardless if you did not supposedly pay for anti theft on your vehicle it has it on it. So try to reset if no manual look online. This needs a pro to scan it to see what is wrong.

There is power going out of the starter relay to the PCM. Everything in the interior work except the fuel and volt gauge until I reset the PCM.

For the past two months various Dodge dealerships, my personal mechanic, nor I have been able to figure out why my truck experiences a problem with starting.

From personal observation if the truck sits for a while, like over night or while I am at work and do not leave for lunch, it will not start and it sounds like the battery is drained. However, the truck can be barely started if you turn the key enough.

My personal mechanic tested the battery and it was not drained and the computer diagnostic did not show any problems so they replaced the ignition switch and rewired the harness.

After three weeks the same problem resurfaced and I took it into the Dodge dealership this time and their computer diagnostic said this time that the battery was drainedd so I replaced it, this was two days ago.

The old battery was not completely drained and was easily recharged back to 100%. I did not put it back on my truck and kept the new one.

Today my truck would not crank, again the brand new battery sounded drained and after thirty attempts my truck eventually and barely started.

Afterwards there was no problems and the truck restarts with ease.

Is this a battery drain or a computer problem?

As far as I know there is a few things could be wrong, but I would first start with the starter, sometimes they can go bad and "drag" which will do that. I had one do exact same thing your saying, lol. Bought new battery and everything but it turned out to be just the starter. If I had to bet that would be what I bet on is replace the starter. Please let me know if that was problem.

Then check the ASD relay under hood it may be doing this have you even tried to reset security system even though you say you do not have it? And It should be scanned by a pro anyhow to see if the power module is effecting this. I canot get into my manual to check the wiring out and will give a reply as soon as I can on this.

It is not the starter.

Just bought a brand new one from AutoZone ($238.00) we installed it at home, very easy to install, went to crank the engine and it did not turn over. Checked the installation, everything was connected and still nothing.

Took off the new starter and put the old one back on, still would not turn over, eventually after thirty forty attempts it eventually turned over and ran. We did not play with any cables or anything, just started when it felt like it.

Thus it is not one of the following mechanical issues:
(1). Ignition Switch.
(2). Wire Harness (Connects to back of Ignition Switch).
(3). Battery.
(4). Starter.
(5). Battery Drain (Something running when truck is off).
(6). Oil Grade.
(7). Fuel Pump.
(8 ). Fuel Sensor.
(9). Battery Cable.

What else could it be, at this point I am desperate? I will be able to return the starter and get a full refund but I am being bled dry by this problem.

Something prevents the starter from turning over the engine and it is not mechanical and has to be something electronic in nature.

My truck does not have an ASD relay in the spot where the manual says.

Okay, let me ask if the battery is charged will it start right away after that? And have you had the alternator tested yet? I am not as familiar with the 2005 so there might be something in between the starter and the ignition (like a inline fuse) that is going bad. And I would maybe try replacing the ground wire from the battery. At least check it on both ends and if looks bad then would replace it for sure. If looks okay would then clean the connections up good.

It will be under hood, but I cannot give that information until I get into manual.

The battery is fully charged and checks out fine, we even hooked up a second battery and it still would not start. The ground wires, battery cables, battery water level, connections and so on are all perfect as can be.

The battery in the truck right now is a brand new Interstate Battery that is less then a week old.

Also, all of the fuses and relays in the black box are working fine.

Something prevents the starter from turning over the truck. Could this be a computer issue?

I have the 4,200 page manual and know the location. I have never had one in the location that is designated.

Is your truck a automatic or a stick shift? If it is a stick shift there is a thing on the clutch that will make it so there is no way can start if not pressed in and that could be going bad. And do you have the auto alarm that if the card is not in the slot will not be able to start. I used to have one of those and the connections would get dirty and prevent me from starting also. If you do have one then pull out the card and clean it with eraser (like we used to on our electric race tracks). As far as a computer thing I am not sure if it would be or not. Wish I had my book with me but it is at fathers house right now. Will try to get it later, but I would check those things out first. Some automatics have the switch on the break pedal, makes it so will not start without brake being pressed in.

Your manual may be wrong or there was a change to it and ours is correct or someone who has had the problem puts it in our tips page.

I deployed to Iraq a few months ago. I told my wife to drive the truck at least once a week, she waited a few weeks before driving it. she drove it got gas at Walmart (I do that often) a few days later she attempts to start it but it does not start. It turns over just fine but it will not start. Any ideas on what the problem may be?

My truck is an automatic and does not have an alarm. Next time it acts up I will try the brake thing.

Hello, I would start by checking the basics. While the vehicle is cranking, check for spark at the plugs, plenty of good spark, use a gauge and check fuel pressure, check for codes.

Some of the national brand autostores will make house-calls. I do not know what they charge? Maybe they will come out and do some basic testing, check for codes.

Okay, I was wrong looking at the wrong relay. Swapped it out no difference. Did I mention my first time all this happened. The night before my headlights would dim and the radio would flicker along with other warning lights on the dash.

No, but I do not think that is the problem.