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01-22-2010, 04:29 PM
Post: #1
Year: 2004
Model: Ram 1500
Engine Size: 3.7L
Auto/Manual: Manual
Mileage: 31000

04 Dodge Ram 1500 pickup, 3.7L V6.

Engine is very slow to warm up. Has done it from New.

Lately it has got worse. replaced thermostat and antifreeze... no help.
gauge is slow to go to normal and no heat out of the heater. untill 10 to 15 minutes of driving.
I have seen there is a service bult. #1800404 or NHTSA# 10005983.
it is about engine slow warmup.

any idea what this is. or must I go to the Dealer.

Thanks for your help.

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01-23-2010, 01:11 AM
Post: #2
RE: Dodge
You can get some clues by doing a google search but unless you strike it lucky with a link where someone actually talks about details your best bet to ask a dealer to read the actual bulletin.

I have been told (over the years) that slow warm up and lack of quick heat is due to an engine being stingy on fuel. While that may be true to some extent I don't fully buy that story because all engines have been required to meet tail pipe / smog standards within 3 minutes for the last (almost) 20 years. Even with a heated O2 sensor that's not going to happen if the engine can't get up to temp (or close) after 5 - 10 minutes.... certainly 15 minutes is out in left field!

Search by using "TSB" before the number and let us know what you find other than it's a common problem.

BTW, if there's a TSB there may be a free fix available but don't count on it.
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