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Old 04-20-2009, 02:35 PM   #1 (permalink)
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fuel pump turn up???

hi i was wondering how to turn my fuel pump up on a 1993 cummins 12 valve without having to worry about runaway>>>>and i want more smoke lol how do i do this myself thanks Aaron
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Old 04-20-2009, 02:48 PM   #2 (permalink)
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the smoke screw will give you smoke without runaway. there is a round cover on top of the injection pump, take it off and there is a torx screw and a lock nut, turn it clockwise to turn it up.
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Old 04-20-2009, 03:34 PM   #3 (permalink)
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how far do i turn the torx down?? all the way
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Old 04-20-2009, 05:42 PM   #4 (permalink)
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here's how i gave me truck "the biscuits" , popped the whole cover of the pump, carefully pull out fuel pin, turn it 180 degrees so that deepest part of the fuel pin is facing toward the front of the truck (you'll easily see what i mean), replace the fuel pin back in, now i also dropped the smoke screw 3 turns, but didnt touch the power screw on the back side, this will deliver more fuel on initial motor accelaration MAKING HER SMOKE
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Old 04-20-2009, 06:05 PM   #5 (permalink)
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Quote:
Originally Posted by Shainer View Post
Read through some of these articles.
Tech Article Links

Here is pump tuning.
CumminsDatabase.com :: Turning Up A P7100 Pump
'89-'93 trucks have the VE pump. '94-'98 have the P7100.
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Old 04-20-2009, 06:23 PM   #6 (permalink)
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i was actually gonna say the same thing
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Old 04-21-2009, 01:04 AM   #7 (permalink)
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Quote:
Originally Posted by moparman9 View Post
hi i was wondering how to turn my fuel pump up on a 1993 cummins 12 valve without having to worry about runaway>>>>and i want more smoke lol how do i do this myself thanks Aaron
this will get you in the right direction

Turning up the pre 94 Ram diesel injector pump
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Old 04-21-2009, 09:34 AM   #8 (permalink)
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I'd buy a fuel pin, like a denny T fuel pin. It will give you more power, smoke and top end! and its easy to install. They claim 40 horse and around 70 ft. lbs of torque by changing the fuel pin.
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Old 04-22-2009, 12:06 AM   #9 (permalink)
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to really make it smoke you need to add more fuel. the adjustments they are suggesting will let the stock amount of fuel to be delivered sooner at lower boost. give a puff of smoke at take off. the fuel screw is in the back of the pump facing the firewall. hard to see but look above the fuel lines for a screw with a collar and a jam nut. loosen the nut and back the screw all the way out. now you need to cut the collar off without damaging the threads. use a file or saw, your choice. put the nut back onto the screw all the way and put the screw back in. i run mine screwed all the way in until it bottoms out and leave it there but i hear about runaway on here all the time. most guys turn it until it bottom and then back it out a couple of turns. you will need to adjust idle. i ran with my screw bottomed out for 130k and my pump gernaided at 250k. i had to replace the pump and the first thing i did was bottom out the fuel screw. that's been 50k and still no runaway. lucky??? this will make the smoke roll. rotate the pin and while your in there with the pin out you will see a gear looking thingy in there. turn that a turn or more for more smoke. that's the star wheel and mine is turned all the way down "clockwise"
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Old 05-25-2009, 04:04 PM   #10 (permalink)
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hey guys,
i have owned one 0f my 93 trucks for about 1 and a half years, it has always seemed a little doggish. I assumed that was because it has 258,000 on it and the previous did not know anything about diesels and did not take care of it. I hauled a load of wood today and had to shift into 4 lo to get it goin up the hill. The load was ot that heavy. My question is how do i give it a little pep without breakin the bank?
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Old 05-25-2009, 09:44 PM   #11 (permalink)
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Quote:
Originally Posted by 12valvemafia View Post
hey guys,
i have owned one 0f my 93 trucks for about 1 and a half years, it has always seemed a little doggish. I assumed that was because it has 258,000 on it and the previous did not know anything about diesels and did not take care of it. I hauled a load of wood today and had to shift into 4 lo to get it goin up the hill. The load was ot that heavy. My question is how do i give it a little pep without breakin the bank?
is it an an automatic truck?
you can have all the power in the world but if the trans wont transfer it it does no good.
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Old 05-26-2009, 03:17 PM   #12 (permalink)
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its an automatic. what brand of torque converter would be recomended?
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