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Engine loss of fuel after hard acceleration.

Daveb
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Mopar1973Man

Mopar1973Man

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Posted (edited)
11 minutes ago, Daveb said:

All I can do is test that and the IAT and MAP while I'm at it.

 

Has no bearing on the issue. IAT and MAP doesn't control fueling or throttle at all.

 

11 minutes ago, Daveb said:

May as well test the engine crank sensor too.

 

Might only if the signal is bouncing but you never mention that. So I doubt it.

 

11 minutes ago, Daveb said:

Now I'm starting to get scared that I'll be able to make it home while out in the UP.  Wondering if it's not a reliable year to own. Seems like you're happy with your 02.

 

Yes because I'm always aware of thing. Like during my month inspection I spend at least one hour on a creeper and inspecting the entire underside of the truck looking up at stuff the most won't even see from opening the hood. Then when I'm doing an oil change I'm testing my alternator with a DVM for excessive AC noise so I'm aware of the diode health. Knowing this is an issue being I've lost 5 alternators in 2 years I know I've not found the cause of the alternator failure yet. The only way to damage a PCM, ECM or VP44 modules is with an alternator with bad diodes. 

 

You can't see this kind of damage. You have to take the alternator apart. 

Denso Alternator Diode or Rectifier

 

Here is another example. Just not our trucks... Just not Dodge even Ford and Chevy have these issues. 

 

Edited by Mopar1973Man
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Daveb

Daveb

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Well thank you for the detail. I'll tear it apart later. If the alternator is bad, do you think the ECM can be flashed or it's smoked?

 

ill still check the apps as this happened overnight. I mean it starts and idles fine, just a responsive/unresponsive wacky pedal. 

 

But more investigation will tell... 

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Mopar1973Man

Mopar1973Man

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First off I would remove the alternator and have it bench tested for AC ripple as most shop would call it. Verify your power first. 

 

Now I would consider having the ECM flashed "may, just maybe" the software can be reset and resolve the issue. If there is any issues the DRBIII tool at a Dodge dealer should be able to spot issues. If the ECM needs to be rebuilt there is a list start here on the website by @pepsi71ocean for good ECM / PCM rebuilders. 

 

 

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Daveb

Daveb

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Well, I performed the attached tests on the APPS. It was all good. Alternator passed on autozones machine. The diodes look good. If it were your truck, what would you do?  It still kinda runs. Can't make it on the freeway to the dealer. Can't believe it took a total crap overnight. This is crazy.  

IMG_5303.PNG

IMG_5304.PNG

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  • 2 months later...
Daveb

Daveb

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THE FIX FOR THIS POST IS HERE!! 

 

The issue was a corrupted ECM.  Autocomputer specialist in Florida did a great job flashing it and it resolved ALL issues.  I had a p602 code which according to them was due to bad terminals and batteries.  

 

So if you have any p600 codes they informed me this is due to the batteries and terminals creating a voltage surge to the ECM corrupting the main processor...

Edited by Daveb
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Dieselfuture

Dieselfuture

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I have a spare ECM from 01 my truck is 02, but all options are the same. It supposedly came out of a running truck. I'm going to give them a call and see if they can flash it to work on 02 and also enable 3/6cyl high idle. And make sure everything else is in good shape. But even for 300 bucks I think I'm better off buying the smarty and doing it my self. I just don't know if that's all I need is a smarty. Also need to change my tire size but not sure if it's in ECM or PCM. Sorry don't mean to take over your thread. 

Can you guys point me in the right direction please @Mopar1973Man @Me78569

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Mopar1973Man

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15 minutes ago, Dieselfuture said:

Also need to change my tire size but not sure if it's in ECM or PCM.

 

Neither... It's in the ABS module. 

Smarty only programs the ECM. The only other thing it can program is the ABS for Speedometer.

 

Personally, I would skip the Smarty and just have a dealer flash the tires size for you. Smarty S-03 just for tire size change is rather expensive. You can get a dealer to flash it for much less.

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Dieselfuture

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4 hours ago, Mopar1973Man said:

 

Neither... It's in the ABS module. 

Smarty only programs the ECM. The only other thing it can program is the ABS for Speedometer.

 

Personally, I would skip the Smarty and just have a dealer flash the tires size for you. Smarty S-03 just for tire size change is rather expensive. You can get a dealer to flash it for much less.

How much does dealer charge to flash and can they flush 01 ecm to work on 02, and does ecm have to be on the truck for them to do it or can just bring ecm in. Never dealt with this before but I do want to have a good working ecm for a spear, especially now that I have one. And I also wanted to to double check mine to make sure it's functioning properly. 

I think I'll just call ecm place and pick their brain, see what they say.

 

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Dieselfuture

Dieselfuture

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5 minutes ago, Mopar1973Man said:

Dealer can only flash what the VIN states

I guess that's why I ether want to send it to ecm place or get a smarty and do it my self, but I have no idea what I'm doing with it. But sounds like it's very easy with smarty to reprogram ecm out of different truck to work on mine just need to know what I'm doing. I can always sell smarty later, I guess another option is to rent one, but once again I want to make sure I can do all this before I rent or buy one. 

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Dieselfuture

Dieselfuture

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4 minutes ago, dave110 said:

Read bottom of pg.2 into pg. 3. Might answer your question.

I was trying to find that post, I even commented on it but couldn't remember all the info. So sounds like i can definitely use 01 on 02 just need right software from smarty. The only other problem is knowing if my spear ecm is any good. I guess I just need to plug it in my truck and go for a ride, who knows it may not need anything at all, and it could already have high idle enabled. 

@Mopar1973Man does 01 and 02 use cam sensors only or 01 still had crank sensor. I think that would be the only difference and maby a newer flash.

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Mopar1973Man

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9 hours ago, Dieselfuture said:

But sounds like it's very easy with smarty to reprogram ecm out of different truck to work on mine

 

Just the cost of the Smarty and the recovery file which will most likely be more than entire rebuilt ECM. Again 1 shop hour at the dealer is about $120 I seriously doubt you'll be able to buy a Smarty S-03 and the recovery file for under $120. All you need to do is tow the truck to the dealer. 

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