4.0 Carburetor Conversion

S

SMLE

Well-known member
Aug 21, 2014
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GA
Looking to convert from EFI to a carburetor on my Disco I, 4.0 engine.


It has electronic ignition. The plan is to also swap that out to a distributor and coil.


My question is this:


Electronic ignition is currently working fine. Can the EFI be converted to carburetion while still using the electronic ignition until funds are available to also swap out the ignition components, or are the EFI and electronic ignition systems tied together in the onboard computer system?


I have read the threads on a swap done several years ago by the Canadian guy (MontrealRR something or other) on this forum , but he swapped out both fuel and ignition components (cam shaft, front plate, etc...) at the same time.


PM'd him some questions a few days ago, but doesn't look like he's active right now.


Thx!
 
stu454

stu454

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Dec 15, 2004
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If you can't afford to do it all at once, and the EFI is currently working, then I have to agree with MM3846.

And besides, why do the swap at all?
 
fishEH

fishEH

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Jan 26, 2009
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stu454 said:
If you can't afford to do it all at once, and the EFI is currently working, then I have to agree with MM3846.

And besides, why do the swap at all?
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Agreed. Not to mention resale will be a major PITA to anybody that lives where there's emissions testing.
 
cosmic88

cosmic88

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maybe he is looking for apocalypse style reliability in his Rover..... First EMP blast and you suckers are done. Then who'll be SMLE-ing?
 
pjkbrit

pjkbrit

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Apr 23, 2004
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lower power, more fuel consumption, no chance of passing inspection.....why on earth would you do this in a working efi vehicle? It's an ok setup for an MGB conversion...but not for a Disco....:banghead:
 
stu454

stu454

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Poor guy (and I'm sincere); joins d-web and runs his idea past us. Then it's carved up before lunch the first day.
 
S

SMLE

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Aug 21, 2014
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stu454 said:
Poor guy (and I'm sincere); joins d-web and runs his idea past us. Then it's carved up before lunch the first day.
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I was expecting the "why in the world do you want to do that" responses...


I was not expecting the "your an idiot" responses. That was kind of rude.


I also was expecting at least one person to give me a straight answer.


Thank you all for pointing out all the cons associated with this conversion. I wasn't aware of the lower fuel economy or the lower resale value or the emission control problems or all the other problems with the conversion...(insert sarcastic smiley face here...)


Apart from the guy indicating he had a points and carb'd engine that is now points and EFI, I'm not sure anybody actually answered the question.


I'm thinking the older one that started out points and carb did not have the computer set for EFI and electronic ignition.


The EFI is not currently functioning correctly. The electronic ignition is.


I would like to know if the EFI and electronic ignition are tied together in a '96 D1 or if they operate independently of each other.
 
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ERover82

ERover82

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Nov 26, 2011
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Darien Gap
What you're really asking is if anyone is willing to disconnect their IAT, MAF, ETS, IACV, FTS, and TPS, and see if it runs off starter fluid. Do this yourself and you'll have the answer you're looking for.
 
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ptschram

ptschram

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Sep 27, 2004
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They are tied together and presumably could be made to provide just the spark, but it would not make it any more of a wise decision.

Your first post would have been much better received had you asked "my truck doesn't run right, it exhibits the following symptoms, what's wrong with it?"

There is absofuckinglutely NO reason to do what you proposed when the GEMS trucks are nearly as easy to fix as the Lucas (distributor) trucks.

Not to mention, there is a REALLY, REALLY, REALLY, REALLY good chance that the problem is not related to the EFI and you will still have the problem after the conversion-didn't think about that, now did ya?
 
p m

p m

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SMLE said:
Apart from the guy indicating he had a points and carb'd engine that is now points and EFI, I'm not sure anybody actually answered the question.
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I thought his truck _had_ points, but now has electronic ignition.
The short answer to your question is - it serves no purpose, relatively expensive and complicated technically (conversion of distributorless engine to one with the distributor), and is blatantly illegal, despite the lack of emissions testing in your area.
But this thread is developing exactly on the rails of the famous "front Detroit" thread.
Patrick Findlay from Canada did exactly what you want. Search for his thread, it is a good entertainment.
 
fishEH

fishEH

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Well I'm glad you can insert your sarcastic smiley face. I tend to make a habit of pointing out the "obvious'" because often times it's NOT obvious to everyone. How many diesel Discos are running around out there that won't pass emissions because they're OBDII? More than you'd think, that's how many. Those guys spend many thousands of dollars converting their Disco only to realize they can't sell it a anybody that lives where there's emissions testing. I bet they're wishing they had dropped another $700 to pick up a '94/95 to convert instead.

SMLE said:
I was expecting the "why in the world do you want to do that" responses...


I was not expecting the "your an idiot" responses. That was kind of rude.


I also was expecting at least one person to give me a straight answer.


Thank you all for pointing out all the cons associated with this conversion. I wasn't aware of the lower fuel economy or the lower resale value or the emission control problems or all the other problems with the conversion...(insert sarcastic smiley face here...)


Apart from the guy indicating he had a points and carb'd engine that is now points and EFI, I'm not sure anybody actually answered the question.


I'm thinking the older one that started out points and carb did not have the computer set for EFI and electronic ignition.


The EFI is not currently functioning correctly. The electronic ignition is.


I would like to know if the EFI and electronic ignition are tied together in a '96 D1 or if they operate independently of each other.
Click to expand...
 
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jafir

jafir

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May 4, 2011
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Northwest Arkansas
fishEH said:
because often times it's NOT obvious to everyone.
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First hint for me was not understanding what electronic ignition means. We are just trying to help, honestly. And the discoweb way of doing that is to tell him how wrong he is. :)

I had points on my 1972 Dodge Dart. The only two things that ever left me stranded in that car? Bad points and a bad starter. I looked around for quite a while for a 1973 electronic ignition setup. That's how OLD this tech is.

If I had an old carbed V8 in a 110 instead of the diesel in a 90, I'd probably hunt down an FI setup from a RRC, and UPGRADE to FI.
 
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