I swapped a early 99 engine into a 2001 truck with a auto trans and just left the wires on the engine and I also didn't swap the computer because I went with a hydra 17 pos chip I have a build thread

 

Ok thanks, might have to pick up a spare idm and give the mod a try sometime.

 

It may or may not be depending if it had been replaced. ( I always use IDM 120 when replacing because they are cheaper)

Don't worry because any one of them will run fine. And if you want to mod it just simply read the sticker.

There is little to be gained from a modified IDM unless your injectors are worn out.

 

E99 had different part number for IDM. Some people think if they swap a l99-03 IDM that it has more voltage output. So yes, it is applicable to his question about interchangeable parts.

 

Well, now I am more confused than ever lol!! Does the E99 have lower voltage idm than the later trucks or not? I thought everything I have read that they are different, therefore they both require different resistors to do the same 140 mod? Sorry if I'm just not getting it, wouldn't be the first time!

 

No apologies here. We saw incorrect/incomplete information and tried to set the record straight. :dunno:

 

My sincere apologies.

 

:doh::doh::doh::doh::doh::doh::doh::doh:

just stop.... please stop

the I in ohms law is current. It's always current. There is never a case where it's something different.

this thread is about a motor swap.

 

Exactly.

bjesse, mentioned to swap IDM's from a newer truck also, in which the IDM's output are all the same. But may people confuse the IDM part numbers (100,110,120) as voltage output. Even though in order to do the infamous 140v IDM mod takes different resistors for different IDM's. Which is where i brought up ohm's law.

 

And reactance. Hucorey, that article is strictly about DC. AC ohms law is much more complex.

 

Patriot,
I realize that but am having a whale of a time conveying to Hucorey that Impedance is different than current.

 

Ohms law has different formulas for AC and DC. DC has resistance, AC has impedance. The resistance(impedance) in AC is different because of moving magnetic fields. Also, with AC, you have to take into account inductance, not so for DC.

 

the electric potential difference between two points on a circuit (ΔV) is equivalent to the product of the current between those two points (I) and the total resistance of all electrical devices present between those two points (R).

 

Hucory,
I guess I'm just going to have to stop. The link you posted explains it ohms law clearly and it is exactly what I stated earlier. I'm not sure where the confusion comes in but if Impedance is measured in ohms just like a resistor and current is measured in amperage then they are clearly not the same thing.

But I digress.

 

Here u go Bill.

http://www.physicsclassroom.com/class/circuits/Lesson-3/Ohm-s-Law

 

Hucorey,
I'm really not trying to come across as a smarty pants but impedance is the opposition of current flow in an AC circuit. That is it's relationship with current but it is defiantly not the same as current.

Mathematically Ohm's law is: I=E/R; E=IxR; R=E/I I is current; E is volts and R is resistance

Again, In no way am I trying to come across as a know it all.
This is the one thing I know a little about...and the intricate details of a woman's mind...NOT!!

My apologies for being part of the hijack.

 

Ohm's law can be written 3 ways

 

Hucorey,

A diesel mechanic I am not. An electrician I am. I think you are a little bit confused on the Ohm's law thing. Impedance is basically resistance in an AC circuit. Ohm's law is: E=IxR where E is volts I is current and R is resistance. When you series batteries you add the voltages and when you parallel batteries you add the current. As far as resistors on a circuit board if they are the same size resistors, when two are in parallel they have half the resistance as one and when two are in series they have twice the resistance as one.

 

My plan was to disconnect the engine wiring harness from the truck and leaving it connected to the engine (on the 2000 engine the wiring harness will still be connected to the AIH, valve cover gaskets through to injectors/glow plugs, HPOP, IPR, ICP, fuel bowl heater, etc.). When I drop the 2000 engine into the early 99 truck, will the main harness (big square plug) plug right into the 2000 harness and function properly?

 

I would swap to the 2000 pcm for the common strategy (from a tuning standpoint the shifting is better than the early. The IDM's were a little less voltage on the earlys (not that they make a difference) and the turbos and its mount are also different

 

IDM's are all the same 94.5 to 03. The number on the side 100, 110, or 120, is just a part number.

 

Please, do explain what you disagree with.

 

diffrent inj's and tunes, diffrent trans shifting strategy. As far as physial diff, inj's hpop, intake runner size, turbo, turbo mounts, intake heater, intercooler pipe size (turbo side). but to the op, as long as you switch turbo and all and pcm and dont need/mind not having intake heater then yes it will swap :thumb:.

Edit: also forgot turbo inlet size and air box are also difftent. As is IDM (E99 has 110V output), same box/connector but diffrent voltage any how it will run just fine though.

 

Yes, you can drop it right in and connect everything and start it. There's no need to swap the PCM.

 

mostly plug and play. main differences are: Intake Air Heater, injectors, HPOP

 

:agree:

Yes, you can drop it right in and connect everything and start it. There's no need to swap the PCM.

:umno: nope nope nope.....