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  #1  
Old 08-06-2019, 12:38 AM
kingnatethegreat kingnatethegreat is offline
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Default 2005 Dakota Idling Issue

Hi,

I am new to this site and also very new to Dodges. I recently got a 2005 Dakota, 4.7L. It has two engine codes, P0508, and P0443. For the IAC issue, the truck idles great once in a while, and the rest of the time it'll either surge and high idle for a few seconds and drop, or it'll just start low and stay low (about 500 rpm). It does hunt around the 500 mark sometimes too. I have replaced the IAC, and done all the things I could find online, including cleaning the throttle body, replacing TPS, replacing all O2 sensors (had to replace the Y-pipe anyway), running injector cleaner/fuel treatment through a tank of gas, and checking any exposed wires for breaks or burn through. I also checked all my fuses. Battery voltage is good, and the truck has a new alternator. For the Evap code, I checked all vacuum lines using the carb cleaner technique, and I have also replaced the purge valve solenoid. No change and no leaks. I also checked the lines above the fuel tank, and didn't see cracking or anything out of the ordinary.

Because I have two circuit related codes, could it be my PCM/ECM? Another issue I noticed is that there are some braided ground straps, there is one that attaches to the firewall toward the passenger side within the engine bay, and there is another above the exhaust pipe under the vehicle. Both straps are broken. Could this be related?

Thanks, any advice is much appreciated.
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  #2  
Old 08-06-2019, 01:47 AM
RalphP RalphP is offline
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Fix the ground straps, clear the codes, and see if they come back.

The carb cleaner method won't find a lot of smaller leaks because the ECU adjusts out the variance on the fly; only way I know of for sure is to pressurize the lines with smoke and see where the smoke comes out.

RwP
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Old 08-06-2019, 02:30 AM
kingnatethegreat kingnatethegreat is offline
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Thanks for the reply. Where would I find a diagram for the ground straps? I've looked around online and have looked in a Chilton manual, and I can't seem to find anything.
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Old 08-06-2019, 02:38 AM
RalphP RalphP is offline
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The Chilton's doesn't even make good toilet paper when it comes to wiring.

Try the Chrysler Factory Service Manual; check on Ebay, or check at http://www.autobooksbishko.com/ for it.

RwP
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Old 08-06-2019, 11:17 PM
kingnatethegreat kingnatethegreat is offline
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Ralph,

Thanks for the info. I got new ground straps, and also had the time to find a pinout chart. I checked continuity for the IAC wires, and both are intact. I guess my thought at this point is, since both the wires hook up and are not broken, could it be the PCM that isn't working right? Is there a way to be sure before spending the money on one? Thanks.
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Old 08-08-2019, 09:38 AM
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You know what? **** this site. I posted some similar shit and got nothing. Hope you fix your truck man. I'm going with pcm too. Let us know what happens
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Old 08-08-2019, 02:54 PM
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Just reviewed your posts and can't figure what you're so butt hurt about. Because someone didn't acknowledge a suggestion? If you're expecting someone to acknowledge every post you make, even if your suggestion worked, is pie in the sky. Just put it out there. Even if it doesn't help that particular situation, it may help others down the road. That's kind of what a forum is all about. Many people find the answer they need without having to submit a question.
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Old 08-08-2019, 03:10 PM
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Let me know how you feel after your truck has been sitting in the driveway for 6 months @ $350/mo and 2 Dodge mechanics tell you it's an unknown issue and the only solution is a motor swap. I was still respectful. Least I know my post was read this time.
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Old 08-15-2019, 08:34 PM
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Ended up replacing the PCM with a refurbished one. Truck runs great, idles great. Only thing now is that with the key in the on position right before starting, the engine light blinks then stays on till I start the truck, then the engine light goes away. My code scanner says I have emissions related DTCs but it doesn't show a specific code and the truck engine light isn't on. I found something on a different forum saying that after unhooking your battery you might get this for several hundred miles. Anyone know anything about this?

DakLikePrescott, I checked everything on my truck, I'd say if yours still isn't running right and you've checked continuity on your wires, give the PCM a shot. I'm no expert, but a $200 part fixed my problem so I can't complain! It was cheaper than hopping between mechanics so I figured I'd give it a shot if you've tried everything else. I have the pinout diagrams for checking continuity if you need those, and I can also give you info on where I got the PCM from.
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Old 08-15-2019, 10:03 PM
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Thanks Nate, shoot me the pcm info when you get a chance. I almost ordered one from LKQ the other day, but a friend called me stranded in his 08 Jeep, same issue, so I will take your recommendation on a refurbished pcm instead of buying another potential grenade. I have read about a break-in period of about 100-200 miles after a battery disconnect, but if you're running and idling fine, reset and see if it comes up again.
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