Cummins Forum

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Feed-merging three firstgen forums into one.
Updated: 54 min 52 sec ago

mabey stupid but worth asking injector ?

Tue, 08/31/2010 - 06:00
ok got a guetion for you guys is it possible to drill the injectors to a bigger size i work at a machine shop and have the capabilites just not sure if possible

colder a/c ??

Tue, 08/31/2010 - 04:00
Ok whats yalls thoughts on this ? what if i was to header wrap the a/c lines up, would it help make the freon colder with less engine bay heat getting to the lines?

hard shifting into third gear

Mon, 08/30/2010 - 23:00
hey i have a 1990 cummins 250 with a 5 spd manual in it. when im shifting up from 2nd to 3rd it grinds but will slide in with litle pressure in but is fine going from 3rd to 4th and then when im down shifting from 4th to 3rd i cant get it into third at all. i've been told something about a blancer...

Allison 1000 behind a 12v

Mon, 08/30/2010 - 23:00
Anybody run an Allison 1000 behind there 12V in there first gen? How does it fit with the floorboard n all?

Fuel Sending Unit

Mon, 08/30/2010 - 21:00
I just bought a 1990 W250 last night and it needs a sending unit. I called the dealership, napa, and a couple salvage yards and can't find one. Does anybody know where to get one from? Thanks, Blake

new boost & trany temp gauges

Mon, 08/30/2010 - 19:00
i just put in my new boost and trany temp gauges. the 1st thing that surprised me was that my boost reads 0 while cruising and then when the load increases the boost increases, i guess i thought it would always read over 0. anyway when i put the peddle to the metal it will read almost 20 #. with...

Electrical Diagrams?

Mon, 08/30/2010 - 19:00
thought maybe some here would know of a website with some wiring diagrams for these trucks.

stock ride height

Mon, 08/30/2010 - 19:00
I had my leaves re-arched, and a leaf added, but the truck seems to still be sitting low, so I am going to have the guy who did my leaves redo them, but I am not sure how much more arch they need to sit right. Anybody have an idea of how high off the ground the frame of a 1993 4x4 3/4 ton should...

non i/c twins

Mon, 08/30/2010 - 17:00
Im trying to get things together to do twins on my '89. The twins are coming off of my '01, so I will have to do some tubing work. The '89 has 40hp injectors, Denny T pin and pump maxed, and will have an Airdog. Does anyone have pics of some non i/c setups? Id like to get some ideas of how to...

3 pc pulse manifold....

Mon, 08/30/2010 - 17:00
has anyone used one of these? the three piece exhaust manifold from ATS, i think. advertised to spool the turbo faster:drool2:, less back pressure:thumbsup:, better economy:party018:? for $470 including gaskets, it sounds like a decent price and looks like its a straightforward job as far as...

A couple of lock up control ideas

Mon, 08/30/2010 - 16:00
As I got closer to installing my 47RH, I turned my attention on how to control lock up. These can be used with an type of OD control with only some fine tuning. I had to keep this an automatic system because the wife drives the truck. The first diagram assumes that lock up can occur in any...

Blown flex plate/flywheel

Mon, 08/30/2010 - 15:00
Hey I just cracked my flex plate inn half and was wondering the best one for my truck I was wondering if you can get upgraded ones for these trucks. I know ATS and BD make them but I'm not Shute for my year. Thanks

Cheapest Head Studs

Mon, 08/30/2010 - 13:00
where are the cheapest head studs at

4K RPM Cummins Application

Mon, 08/30/2010 - 12:00
I am wondering if anyone knows in what application did Cummins make an engine that was intended to turn 4000 rpm or more. Industrial, Marine, GenSet? CPL#'s? Mabe even an Engine Serial #

Got the tranny re-done!

Mon, 08/30/2010 - 10:00
Bought my truck a year ago and knew the tranny was going. Decided to just roll with it until it needed rebuilding. Well, two weeks ago she went. Know a good tranny guy that got me all toughened up! Don't know much about auto's but this is what he put in it. Got HD ceramic coated clutches,...

kdp fell out

Mon, 08/30/2010 - 10:00
todays i decided to fix my oil leak problem so i pulled the fan and ballancer off to see a bubbled out spot in my timing cover with a hole in it i prociede to take the cover off and low and behold the pin had fell but to my luck no damage to anything so i ran into work and tiged the spot up and put...

Windshield Wiper wont shut off

Mon, 08/30/2010 - 09:00
I am having a problem with the windshield wipers on my truck. I can turn them on but they wont shut off. I have repaced the turn signal/ wiper switch on the steering column concerning a turn signal issue. However this was an exsisting problem. I know there is an intermitened wiper controller as...

what will it take to make them fit

Mon, 08/30/2010 - 09:00
what would it take to put 22.5 semi wheels and tires on a d350 2wd. i dont want to lift it super high been that its 2wd but if i can fit them it a 4" lift or so them im willing to do it. i already have alum 22.5's and tires so all i would need is the adapters

Kdp?

Mon, 08/30/2010 - 08:00
I just don't where its at or what it looks like? So i was wondering those two things and how to take care of it!

front drive shaft. lifted

Mon, 08/30/2010 - 07:00
It looks like when i put my 6in lift kit on i will have issues with driveshaft hitting the crossmember?