94 Nas d90 200 tdi swap - Defender Source
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  #1  
Old February 27th, 2016, 02:24 PM
slatelacy
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94 Nas d90 200 tdi swap

Hey guys. I'm just trying to get an idea of what I am looking at. How big of a job is swapping a 200/300tdi into a NAS truck?
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  #2  
Old February 27th, 2016, 02:39 PM
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don't do it you will likely spend $15000 on the conversion and the truck will be depreciated .... buy a ROW already done....
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no thanks whatever I tell you, you will low ball me
I would rather keep the parts in storage
good luck with your search
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  #3  
Old February 27th, 2016, 02:52 PM
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That's what I figured!
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  #4  
Old February 27th, 2016, 11:48 PM
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Why do you want to swap?
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Old February 28th, 2016, 03:21 PM
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I agree go for a ROW that already has a Tdi. For NAS I think there are better options that would increase both fuel efficiency and performance, like an LS or BMW I6. Ford sells a turbo 4-cyl EcoBoost crate engine that would probably be pretty rad. I'm pretty sure it'd hook up to an MT82.
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Old February 28th, 2016, 08:13 PM
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Thanks for all the info. My truck has a 4.6 with about 10k miles on it and I just can't ever get it to run right. I'm having some kind of ecu/electrical/sensor problems. No one seems to be able to figure it out and I'm getting tired of messing with it.
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Old February 28th, 2016, 08:26 PM
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Who performed the swap? Was it a new engine or a rebuild?
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Old February 28th, 2016, 08:44 PM
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West coast Rover. I bought it from a guy after the swap. Motor had less than 1000 miles when I got it. It was a new block I believe. It ran fine for a couple of years, but gradually started to act up. Constantly throwing fault code 44. I've changed out damn near ever sensor. No change.
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Old February 28th, 2016, 08:55 PM
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Quote:
Originally Posted by slatelacy View Post
West coast Rover. I bought it from a guy after the swap. Motor had less than 1000 miles when I got it. It was a new block I believe. It ran fine for a couple of years, but gradually started to act up. Constantly throwing fault code 44. I've changed out damn near ever sensor. No change.
find Jimmy on here he can probably help you.
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Old February 28th, 2016, 08:59 PM
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Code 44 is the o2 sensor on drivers side..
A loose o2 or damaged will cause that..along with rough running, stalling and check engine lights.
If the o2 is damaged at all replace it.

Also corroded wires/cap/ and other causes can do that as well..

Do you know how to check all the codes? They show in series..

Search cel 45 here..

Going diesel will cost you $15k.. A 4.6 is an even upgrade
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Defenders don't wear out they just need more parts.

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Old February 28th, 2016, 09:35 PM
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Also worth mentioning: About a year ago, something started draining the battery, as in a few hours if left parked. Replaced alternator, disconnected radio, checked for interior lights/checked ignition switch. Nothing fixed this. I finally ended up installing a battery cutoff. This happened after being in my garage over the winter. My thinking is, that mice may have chewed a wire or wires, but I have checked everything that I can get to and found nothing.
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  #12  
Old February 29th, 2016, 01:20 AM
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Out of curiosity...

Did you go through every single fuse and connected an amperage meter on the panel with key out of the ignition?

By process of elimination you ought to find a circuit with a sizable amperage flow...
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  #13  
Old February 29th, 2016, 01:26 AM
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Follow the wiring from the sensors; the swap could've had a bad splice or a maybe the wiring melted on the exhaust.
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  #14  
Old February 29th, 2016, 06:58 AM
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This may be obvious but worth a second mention Imo. The difference in a Tdi's abilities is significant. You should try to drive and get to know well the abilities of a TDI before making a swap. They're both great (tdi's and the 4.6) but very different.
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Old February 29th, 2016, 06:42 PM
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I feel like I might need to start a new thread, since I am now discussing the reason for the swap. But heres an update anyway. I cleared all of the codes and just like I am seeing on other threads, truck runs fine for 10-15 min and the light comes on. This time it shows code 45. Funky idle at stop signs (sometimes almost dies), really bad gas milage, I can really smell the exhaust. O2 sensors? I replaced them when this first started happening, but nothing changed. I just ordered new o2 sensors, a tune up kit(plugs, dis cap, wires) and a new ignition/amplifier module. Im out of ideas after this!
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  #16  
Old February 29th, 2016, 06:51 PM
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Make sure your current o2's don't look like this

Just realized your close ish too...

Uncle Doug, and a few good shops are close to you.

Pm me and I'll give you my phone number.. Cel's suck but normally have a definitive cause...
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Old February 29th, 2016, 06:56 PM
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They looked good to me. Something else that I read pointed to the sensors not getting power if you see both codes. Both codes were present when I cleared out the codes, but just 45 appeared during this last light.
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  #18  
Old February 29th, 2016, 07:00 PM
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Check for corrosion on the cap wires.. Pull them from the cap one by one and if it's green in any of them replace the wires and cap.

The right side (pass) o2 can be hit by the driveshaft (it's at a bad angle)..
Denting it can kill it,
Also make sure it's 100% seated at the plug in the engine bay..

I've had about everything happen with cel 45..
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