12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

why does my truck start soooo good? seriously..

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Old 03-17-2010, 03:38 PM
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Default why does my truck start soooo good? seriously..

So what's up with my truck that this 256k mile truck will start in 10* weather without even cycling the grid heater, stone cold, quicker than my 132k mile 7.3 that's been ran all day in 70* weather and had the glows cycled? I cannot believe how disguistingly fast this truck starts. The throttle response on this 12v is so damn crisp and responsive too. The only thing is the cummins puffs whit smoke at startup and sometimes black but it clears up after a few secs
 
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Old 03-17-2010, 03:55 PM
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The 7.3 uses a much less effective heating method than a cummins. Also anything with mechanical injection is going to start easier than one with a HEUI injection system. With HEUI the injectors need to see at least 30lbs oil press to fire them.
 
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Old 03-17-2010, 03:59 PM
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oh I suppose that makes sense. But even w/out cycling the grids on the cummins this truck starts FAST. Very fast. As in it MIGHT make one revolution before kicking over.
 
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Old 03-17-2010, 04:09 PM
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Because it doesn't need to sense oil press. That can be a bad thing though. If a HEUI system looses oil press the truck will shutoff this can be a saving grace from a catastrophic failure.
 
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Old 03-17-2010, 04:26 PM
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Been telling you Ford guys for a long time what truck is better - not many of you listen though...
 
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Old 03-17-2010, 04:35 PM
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Originally Posted by 12valvetater
Because it doesn't need to sense oil press. That can be a bad thing though. If a HEUI system looses oil press the truck will shutoff this can be a saving grace from a catastrophic failure.
Oh that is pretty badass.. Man those electronic injectors are SO damn noisy though!!

Originally Posted by Dr. Evil
Been telling you Ford guys for a long time what truck is better - not many of you listen though...
hahaha smarty. Hey i'll tell you what my 7.3 6spd with just an intake exhaust and disconnected wg would run CIRCLES around this cummins. Mileage is suffering too but I think its due to a bad cat and fuel filter :\
 
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Old 03-17-2010, 04:48 PM
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Originally Posted by 85_305

hahaha smarty. Hey i'll tell you what my 7.3 6spd with just an intake exhaust and disconnected wg would run CIRCLES around this cummins. Mileage is suffering too but I think its due to a bad cat and fuel filter :\
Yeah, but when you are finally done the Cummins will be twice the HP and half the cost of the bombed Ford...

Sorry, couldnt help myself. Constructive criticism not brand bashing....
 
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Old 03-17-2010, 06:00 PM
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Originally Posted by 12valvetater
Because it doesn't need to sense oil press. That can be a bad thing though. If a HEUI system looses oil press the truck will shutoff this can be a saving grace from a catastrophic failure.
thats y in cold weather i crank my truck over a few times b4 the grid heater comes on, get some oil going through the system b4 there is load on the mains....

power strokers were always cold blooded, even the older ones
 
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Old 03-17-2010, 06:09 PM
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Originally Posted by Dr. Evil
Yeah, but when you are finally done the Cummins will be twice the HP and half the cost of the bombed Ford...

Sorry, couldnt help myself. Constructive criticism not brand bashing....
Well honestly, I didn't see it that way before I started researching them but now I completely agree. I can buy injectors, fuel plate, boost elbow, exhaust, intake, and even a bigger turbo for CHEAPER than I was going to pay for some injectors for my 7.3. I'll have 3x the power of a powerstroke for 1/5 the price. Oh and the mileage of these Cummins is supposed to be the best too (though in my psd I got 20mpg city and I'm getting 11mpg city and 19.3mpg highway in my cummins.. think there are some things wrong with it)

Originally Posted by wes-cummins
thats y in cold weather i crank my truck over a few times b4 the grid heater comes on, get some oil going through the system b4 there is load on the mains....

power strokers were always cold blooded, even the older ones
Well the thing is, I CANT crank my motor over a few times before allowing the grid to heat up, this truck will literally start right up with no issues on the first attempt.
 
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Old 03-17-2010, 08:07 PM
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Timing is a little low. Bump the timing up and starting will become harder and mileage will go up.
 


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