2003 1500 4.7. I just changed the spark plugs (which hadn't been done in 100k since who knew you had to change them every 30K). Replaced the old plugs which were quite worn to say the least with good old Champion Copper tops. Since doing this the truck has died twice when slowed down or stopped to make a turn such as pulling into my driveway or pulling out of a parking lot. I can put it in neutral and it starts right back up and purrs like a kitten. Anyone have any ideas as to what could be causing this? I have checked the vacuum/air hoses connected to the airbox which needed to come off to do the spark plug change. any malformation would be helpful.

 

Any check engine lights lit up? There are a few threads with guys having the issue of stalling when coming to a stop or going around curves. Might wanna do some thread searching and see what you can find

 

4.7 plug interval is not that short, I think. Check the coil pack connections, clean the TB and Sea Foam it.

 

No check engine light so far. Will check the coil pack connections but if one connection is bad why would the truck just die? wouldn't it continue to run on the 7 firing cylinders? Will do some more thread searching. Thanks for the tips.

 

Also Clean the TB? Showing my ignorance here what's the TB and what's sea foaming it? Thanks

 

I have seen threads on two boards where guys found shorts or loose connections in the PDC and circuit boards and would cause the truck to die in mid motion. Replacing the PDC was the resolution.

 

TB got it now Throttle Body. DUH. However never heard of sea foam except as a bubble bath type stuff you don't mean that do you?

 

haha, no not a bubble bath. Seafoam is a petroleum subtrate that is purchased at an auto parts store. it's in a white metal can that has red lettering on it.
You can do a Youtube search on Seafoam and there are tons of videos that show you exactly what to do, but here's a quick run-down.
What you do is start your truck up and disconnect a vacuum line off your intake manifold(this can be your pvc or brake booster line..etc) you stick the rubber hose into the can if it will fit and suck up the liquid. Do this in short gulps because your engine will want to die because your essentially choking off it's air supply. Suck up 1/3-1/2 the can at a descent pace, not taking your time. The key here is to get it all sucked up and then shut your truck off and let the seafoam sit inside your vacuum lines and intake so it can dissolve all of the carbon build-up. If you take 20minutes to suck it all up, you kinda defeat the purpose.
So, after you get 1/3-1/2 the can sucked up. You want to shut your truck off right away and let it sit for 20minutes. Then restart and let it run until the smoke dissapates. There may be a little or there may be a whole chitload. I wouldn't drive it at this point, just let it idle in park or even rev it a few times.
You also have an IAC valve(Idle Air Control valve) that is mounted to the side of the T/B which controls idle flow. if the needle or spring is sticking, you can get stalling on the decel when idleing. Ths can be taken off and lightly cleaned with intake cleaner.
Don't use brake cleaner on any of this stuff. ONLY use Intake/throttlebody cleaner for those 2 items.

 

DO NOT stick the hose in the can! Hold the hose and tip the can into it slowly while someone keeps the engine wound up a bit. Let the hose slurp up about 1/3 of the can. It will want to stall, so make sure it keeps running.

After it has slurped up the Sea Foam, shut it off and let it sit five minutes. Put the vacuum hose back on the brake booster and start 'er up.

Also DO NOT use anything except brake cleaner!! Dodge has a TSB on this, saying not to use TB/Carb cleaner.

 

Well I think if figured out what it might be after doing a lot of thread searching. I have a feeling the since this started after I changed the plugs it has to do with the fact that I disconnected the battery when I changed the plugs. I know it's probably not needed but I am real short so I do a lot of standing on the bumper and didn't want to take a chance setting off an airbag. Anyhoo I think the issue is that the computer reset and the stalling was the result of the computer relearning throttle position. However I will seafoam the TB since it's probably not a bad idea to clean it. While I'm talking about cleaning Dodge service has always tried to sell me an engine flush that is supposed to clean sludge out of the engine. Is this a real issue if the oil is changed regularly?