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01:23:41 - 12/20/2024
V8 Dakotas
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ZenDak
Dodge Dakota
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9/08/2004
10:42:42
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 Subject: Died this morning...
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..but fired up again.
What happened? - I have an '01 4.7 auto. My truck sat all night, and it got down to maybe 60 degrees F last night. I am also still having O2 sensor problems. When I first fired it up it sounded a little off, and when I dropped it into 'Drive' it just died. I fired it back up and noticed that when I gave it gas that it would stumble pretty bad,,then rev up like normal. This went on for a good minute,,,,then it was fine and ran like a bat outta hell. Was the motor just cold,,and needed to 'relearn' the amount of fuel to use? - could the O2's have played a part? I believe it is already running quite rich anyway. Any feedback is appreciated.
Thanks,
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first
Dodge Dakota
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9/08/2004
17:47:45
| RE: Died this morning...
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fix what you know for sure is wrong, the O2, that way you do not have it to compound what ever else is wrong. What I mean is, the more things that are wrong with it that you know are wrong, could compound into a problem that seems to be more then it is, so if you fix what is known to be bad, you might find that alone will fix it or only some small little thing is bad and easy to fix. If you are runnin rich, the O2's read the air fuel mxture and tell the computer what it needs to know to get it to run right in the correct A/F ratio. SO FIX THE DARN O2s and THEN SEE WHAT ELSE IS GOING ON. you might find that the sole source of your trouble is you being to lazy or cheap to fix the O2s.
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fastyz400
Dodge Dakota
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9/08/2004
18:49:59
| RE: Died this morning...
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Actually, the computer does not use the O2 sensor at startup, it's what's called a open loop. When the car warms up then the computer goes into a closed loop. This is when all the sensors are used.
If, your having Stumbling problems, and nothing else is wrong with the vehicle after it warms up. I would check all the grounding connection. That means check the following:
Battery terminal bolts
Ground wire from block
If, those are corrosion free and tight. I would look at your distributor cap for hairline cracks. or just replace the darn thing. Or it could be plug wires going bad.
For the hell of it, have your battery checked at the local autozone, it's free.
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DennisO
Dodge Dakota
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9/08/2004
19:30:51
| RE: Died this morning...
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I wouldn't look to hard for that distributor cap for cracks (4.7s don't have them). From what I know it could be any number of things...here is my motto -if its electronically controlled you will have problems at some point but usually pretty simple to fix- The easiest way to find out if there is a problem is to have a diagnostic check done. Go to Autozone I think they will do it for free.
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jb
Dodge Dakota
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9/08/2004
20:55:41
| RE: Died this morning...
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i had the same problem going on a couple of weeks ago. i just replace the battery and took care of the problem. maintenance free batteries only last about 3 years.
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ZenDak
Dodge Dakota
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9/09/2004
13:02:38
| RE: Died this morning...
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Ya,,I figured at start up it would not be reading O2's for data then. Besides the O2's on my truck that are giving me greif are behind that cats,,so I don't think they would play a big part. (Don't know about ya'll,,but for the life of me I can not remove the one infront of the CAT on the passenger side,,,I've bought like 3 different tools,,and there is no room)
Yep,,no distibutors on these 4.7's.
I doubt autozone could read more than what I can pull using the key trick,,only codes currently are for the O2's.
It did do it slightly this morning,,but not bad,,,can't figure it out. Once warmed up she runs really good.
by the way 'First' I have been trying to fix my emissions problems for some time. Not being cheap,,but more of a lack of time.
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GasMan
Dodge Dakota
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9/09/2004
21:44:17
| RE: Died this morning...
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Maybe its losing fuel pressure...until warmed up.
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ZenDak
Dodge Dakota
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9/10/2004
10:19:29
| RE: Died this morning...
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So my fuel pump could be going out?,,clogged filter somewhere? - sounds like more time and money...yippie.
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Kowalski
GenIII
9/10/2004
15:41:22
| RE: Died this morning...
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I doubt it - I'll be surprised if someone can explain how fuel pressure would return to normal in a warmed up engine. It just might be the battery as jb suggested.
Lead, follow, or get out of the way
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GasMan
Dodge Dakota
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9/10/2004
23:21:33
| RE: Died this morning...
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A leaking fuel system (on a cold engine) has to rebuild pressure to supply adequate fuel to all of the injectors properly. I have this problem in the cooler weather with my 95 318. My engine stumbles for a about a minute and will almost stall when really giving it the gas. I just take it easy until the fuel rails pressurize (just a minute or so). If the alternator is working properly and is charging the battery, how can a battery cause this? This assumes that the battery will start the engine with 12V and lots of amps available. The highest load on the battery occurs during startup, not while idling. If the fuel pressure isnt suspect, I vote for a bad electrical connection, ground, dist cap or otherwise.
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Kowalski
GenIII
9/11/2004
07:26:29
| RE: Died this morning...
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In a marginal battery, you might still have enough amprage to crank, but the voltage could be a bit low. The PCM could be more sensitive to low voltage than the starter, and then the truck is relearning its idle settings when started and having problems. Your example is what I suspected you meant to say, but it doesn't take as long to pressurize the fuel system as it does to warm up the engine. There is no distributor on a 4.7, but your suggestion to check other electrical connections is a good one.
Lead, follow, or get out of the way
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94dakr/t
Dodge Dakota
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9/11/2004
10:17:18
| RE: Died this morning...
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I agree with the low voltage thing..when a battery sits over night..and is starting to drop a cell..it would do exactly what you said. just enough to crank..but not enough to run all the electronics on and just after startup. Todays trucks require all the juice the battery can kick out a start up..with all the computer and electrical functions. So as above..i would check battery connections and have your battery checked or replaced!!
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daffydak
GenIII
9/11/2004
11:16:07
| RE: Died this morning...
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Mine does pretty much the SAME THING! (00 CC 4x4 4.7L auto) only on cold startup, it idles rough (it has never stalled though) and sounds like it has a BIG cam! it gets down to around 350 or so RPMs, then the pcm will freak out and rev up to about 1200 or so. then its fine after that... I find that if I start it and keep it around 1,000 or so, it never idles rough/hesitates... I get NO codes though.... and I have fesh plugs and a clean air filter, and I have ran fuel injector cleaner through many times.. It runs great otherwise! Though It smells a little rich when its running rough as well...
I do bieleve that it IS the origonal battery, but it cranks fine...
Dan
MOPAR=More Power!!
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Paul
Dodge Dakota
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9/11/2004
23:27:53
| RE: Died this morning...
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I have an '00 4.7 that was having similar probs. then one morning the batt. was dead. but it was barely able to start it, but it as soon as it tried to idle it would die for the first few mins. I guess the alternater dosent put out enough juice to run everything at idle. anyways i replace the battery ad it fixed the prob.
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daffydak
GenIII
9/12/2004
02:02:23
| RE: Died this morning...
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Maybe I'll hop on over to AutoZone, and have my battery load tested...Having a good battery is important, especially with winter approaching!
The thing is, it cranks fine when I start it. it dosent delay or crank slowly at all..... But now that you mention it, my battery gauge stays below the 14v mark for about 30 seconds after the engine is started.. I hope a New battery helps. Its embarassing having a crappy sounding engine at startup :-(
Dan
MOPAR=More Power!!
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daffydak
GenIII
9/14/2004
11:38:18
| RE: Died this morning...
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*update*
I cleaned my terminals and in the process reset my PCM. the battery terminals weren't corroded, just a little dull looking. Anyways, the rough idle at startup is GONE! I have put 70 miles on it since, and its still working fine. I tried resetting the PCM before, and it didn't help. I surmise that the terminals were just dirty enough to cause a problem...
00 CC 4.7L 4X4 Auto, 3:55 LSD
Flowmaster orig. 40 series (2 chamber) muffler, adjusted tps to .76V, ported TB, home brew intake setup w/K&N filter, more mods to come!!!
Dan
MOPAR=More Power!!
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ZenDak
Dodge Dakota
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9/14/2004
12:36:43
| RE: Died this morning...
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Kewlness,,,,I want to get a spiffy Optima one then. $100+ though,,,eh. I hope it fixes it. So far it's got to be below 60 degrees out before it happens. I hope that cures the problem. My truck just turned 3 yr.s old over the weekend since I bought new,,and has 105,000 miles on her. Great truck.
Now I've just gotta pin point that damn *squeak* from my front driver side,,and I'll be sitting pretty,,,oh ya and the O2's,,,,and the ash tray that won't stay up,,,and drivers side window that needs greasing,,and my hood that got a crappy paint job and is coming off too easy, and cracked windshield,,,,Other than that it's a freak'n awesome ride!
Graci ya! - gonna scope my battery later.
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daffydak
GenIII
9/14/2004
13:39:40
| RE: Died this morning...
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let me know what part number you use for the optima battery :-)
I need to grease my driver's side window too! its getting harder to wind down (I have MANUAL locks, windows, and mirrors) I'm not a big fan of the fancy power accessories... It's just another thing to break :-P
But I couldn't live without A/C, Cruise, and FOG LIGHTS!
00 CC 4.7L 4X4 Auto, 3:55 LSD
Flowmaster orig. 40 series (2 chamber) muffler, adjusted tps to .76V, ported TB, home brew intake setup w/K&N filter, more mods to come!!!
Dan
MOPAR=More Power!!
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ZenDak
Dodge Dakota
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9/14/2004
15:19:18
| RE: Died this morning...
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Hahaa,,,forgot to add that to my list - blow'd out foglight (crappy OEM open element design).
I just pull the door panel off and spray some silicone all over the place,,,,it helps for about 6 months.
I'm going to get a Red Top battery,,,thought about a yellow,,but probably don't need it for a daily driver. Best price I've found is like $119 dollars from some websites. Once I've found the cheapest I'm gonna call 4wheelparts and tell them cause the claim and back up to have the lowest prices. Let me know if you find it cheaper - for a Red Top that is.
PEACE,
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daffydak
GenIII
9/17/2004
13:58:06
| RE: Died this morning...
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well... it did it again today!! its miserable out, maybe that has something to do with it.. (and it was about 55 degrees it has been in the mid 60s for lows until today) I still think its the battery... now I WILL get it load tested on my next day off!
It sat for about 36 hours, and it started fine yesterday. I started it this morning, and it ran rougn and almost died.... and then it recovered. I did notice that the volt gauge was below the 14 mark until it stopped running poorly (about 15-20 seconds) that may just be from the low engine speed, or the battery sucking the alternator dry for a few seconds. I have the 136 amp alternator, maybe thats why it recovers pretty fast. my other dak had the 117 amp alt. maybe that's why I noticed a bad battery better with it. I don't get it though, my engine cranks over quickly. maybe the battery is taxed pretty good by the cranking, and the alternator has to charge it back up for it to run right....
00 CC Sport Plus 4.7L 4X4 Auto, 3:55 LSD
Flowmaster orig. 40 series (2 chamber) muffler, adjusted tps to .76V, ported TB, home brew intake setup w/K&N filter, more mods to come!!!
Dan
MOPAR=More Power!!
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