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Old 02-07-2014, 02:23 PM   #1
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throwing it out there problems again (PLEASE)

Sorry guys but I need some advice.
I am just lost as to what is going on. let me start out It's a 04 and I am having a cold start issue that just wont get fixed no matter what I try.
needs to be over night stone cold when it acts up

starts to act up below freezing and the colder it get the worst it is. after its warm its fine. the truck has sat for three days at 20 or colder and when I went out this morning neg 3 deg I ran the battery dead trying to start it.AGAIN

it cranks just fine but it pops and sputters and backfires through the intake it wants to fire but don't catch. I'm going to do damage to something if I cant figure it out.

First I put in a coolant sender AGAIN that didn't help was told it needs plugs changed did that.
the old ones only had maybe 30k DIDNT HELP

talked to the dealer and they flashed it. DIDNT HELP

swapped the temp censer with my sons truck that DIDNT HELP the one buy the radiator. both 04
do I need a crank or cam sender or air censer

kind of limited what I can do at home
THANKS EVERYBODY

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Old 02-07-2014, 03:48 PM   #2
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Question

This doesn't address the cause of the problem - but can you attach the MOPAR block heater to your truck?

Just a thought???



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Old 02-07-2014, 04:12 PM   #3
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Just checking but, does it happen to be a southern addition?

Maybe, like me, it just doesn't like the cold.

Sorry for not being very helpful. But hope it maybe made you laugh a little.
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Old 02-07-2014, 06:01 PM   #4
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Wish I could help but I have the same issue. Not my truck but me.
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Old 02-07-2014, 06:13 PM   #5
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When it cranks and doesn't fire do you touch the accelerator pedal? If you are then it is probably being flooded. Try holding the pedal to the floor while you are cranking to activate the flood mode. This cuts the injectors and usually the engine will burst into life. Are you getting any codes? Sometimes a bad Crank Sensor won't give a code. Bad ground, weak battery will also cause problems. Might try putting a battery tender on it on cold nights.
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Old 02-07-2014, 06:48 PM   #6
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battery is hot. I have tried to hold the pedal down and it backfires even more.NO CODES. temp is going to be above freezing Sunday it should start


Quote:
Originally Posted by Redtruck-VA View Post
When it cranks and doesn't fire do you touch the accelerator pedal? If you are then it is probably being flooded. Try holding the pedal to the floor while you are cranking to activate the flood mode. This cuts the injectors and usually the engine will burst into life. Are you getting any codes? Sometimes a bad Crank Sensor won't give a code. Bad ground, weak battery will also cause problems. Might try putting a battery tender on it on cold nights.
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Old 02-07-2014, 07:08 PM   #7
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Back firing into a composite intake manifold is always worrisome. I guess the question is how combustion is getting pass what should be a closed intake valve. Spark being electronically controlled makes it hard to believe it is off. Maybe something with lifters being stiff with the cold holding the valves open, but I find that a stretch unless you are using the wrong oil. Good luck...
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Old 02-07-2014, 07:28 PM   #8
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I'm using 10w30 full synthetic oil and mopar filter. always since new
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Old 02-07-2014, 07:40 PM   #9
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Quote:
Originally Posted by boedacres View Post
I'm using 10w30 full synthetic oil and mopar filter. always since new
I would think that oil should be good. How cold has it been there? I fired mine up after sitting a few very cold days below freezing without an issue. But ole Red is always a sweet heart.
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Old 02-07-2014, 08:25 PM   #10
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Hi Boedacres,
Sounds like too much air. Do you have a gasket leaking somewhere? Is your cold start mixture rich enough to fire? There has to be a clod start circuit or en richer circuit in the fuel inj. To enrich for cold starts. Also you said it only happens ice cold is there possibly a vacuum leak somewhere that only acts up when the hoses are all contracted and/or all the vacuum acc. building up?
Just some thoughts to check.

Good luck and hope you get your ride sorted.

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