Auto to manual injector pump

Is there a lot of difference in the internals on a Auto to Manual injector pump?
The engine was from one of the first Auto Disco's, so must be about 1995 but has been in my defender for the last 2 years. I've been getting 25mpg & never gets better no matter how I drive.
Will it be easier just to swop pumps from a manual, as it needs a new cam belt soon anyway.
I know there's no guarantee that it will get better but over the next year would save a min of £500

666 george said:

Is there a lot of difference in the internals on a Auto to Manual injector pump?
The engine was from one of the first Auto Disco's, so must be about 1995 but has been in my defender for the last 2 years. I've been getting 25mpg & never gets better no matter how I drive.
Will it be easier just to swop pumps from a manual, as it needs a new cam belt soon anyway.
I know there's no guarantee that it will get better but over the next year would save a min of £500

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I am by no means an expert on this, but I thought the later Auto injector pump was for the EDC variant engine so electronically controlled, thus more efficient because it continually adjusts fuel delivery based on changing external influences. The manual pump is pre set to deliver a set amount of fuel, but can be tweaked to deliver more fuel for more punch.
I was going to change to manual, but was advised against it, and am getting the electronic pump tuned when my local expert can fit me in

KNine said:

I am by no means an expert on this, but I thought the later Auto injector pump was for the EDC variant engine so electronically controlled, thus more efficient because it continually adjusts fuel delivery based on changing external influences. The manual pump is pre set to deliver a set amount of fuel, but can be tweaked to deliver more fuel for more punch.
I was going to change to manual, but was advised against it, and am getting the electronic pump tuned when my local expert can fit me in

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Hi, just wondered if you were able to elaborate as to why you were advised against swapping to manual pump? I have bought one recently with the intention of scrapping the EDC system.
Apologies to O/P if this is a hi jack but may also be relevant to him.

Fizzer said:

Hi, just wondered if you were able to elaborate as to why you were advised against swapping to manual pump? I have bought one recently with the intention of scrapping the EDC system.
Apologies to O/P if this is a hi jack but may also be relevant to him.

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It was based on the fact that the EDC pump constantly delivers the correct fuel based on altitude and other external factors, so for me, driving in mountain regions in Morroco or the Alps, this was important. when a manual pump is tuned, it is tuned to a baseline, and won't react when external factors change. He also advised that the electronic box of tricks that some people wire into the EDC to tune the pump really only trick the pump into thinking it needs more fuel for more punch, but he is going to tune my EDC for more punch, but to a setting where it will also pass MOT, and will also not pour out to much smoke when using kick down. He is a diesel pump professional and says the EDC is far superior to the manual pump. Also the injectors that the EDC pump use are superior to the manual pump injectors. He also told me that the reason EDC pumps were invented was to meet European legislation where a pump must perform to a set standard for I think 3 years. A manual pump cannot do that, but the electronic one will constantly monitor and deliver the correct fuelling. As I say I am no expert and am repeating what I was informed.

666 george said:

Is there a lot of difference in the internals on a Auto to Manual injector pump?
The engine was from one of the first Auto Disco's, so must be about 1995 but has been in my defender for the last 2 years. I've been getting 25mpg & never gets better no matter how I drive.
Will it be easier just to swop pumps from a manual, as it needs a new cam belt soon anyway.
I know there's no guarantee that it will get better but over the next year would save a min of £500

Click to expand...

IIRC, a '95 auto would have just had the manual pump - it's too early for the EDC system which was introduced to increase the available power in the auto's. If you have no remote computer for your pump, and no wiring loom connected to the pump, then it will be a pure mechanical pump. Post a picture....
My first disco was a '95 auto - standard VE pump.

....
As to the "benefits" of EDC - its does provide more power than the standard IP, but, the problem is that number four injector, ERR3337, is no longer available - and has been out of production for over ten years. When the sensor in same fails = MIL on - the vehicle fails its MOT = a big problem. ( I am told they can be made, but this is about £1200 each!!)

When mine failed, I fitted a full width intercooler, standard VE pump, with boost pin, and this was tuned to significantly more than the EDC's 123 BHP.

This remains a huge plus for me, as I hate electronics on a vehicle - we live high up in the hills, and the damp seems to destroy them, so they are better gone out of the way - YMMV.

Fizzer said:

Hi, just wondered if you were able to elaborate as to why you were advised against swapping to manual pump? I have bought one recently with the intention of scrapping the EDC system.
Apologies to O/P if this is a hi jack but may also be relevant to him.

Click to expand...

If your EDC system is working properly, then, it is probably best left alone - however, if, as I mentioned above, you are up a certain creek, then bin it!

PM me if you want some advice on doing it - its not complicated......

Disco1BFG said:

If your EDC system is working properly, then, it is probably best left alone - however, if, as I mentioned above, you are up a certain creek, then bin it!

PM me if you want some advice on doing it - its not complicated......

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EDC is not, at the moment anyway, causing a problem. I like the simplicity of the manual system. Thanks. I will, I am sure, need pointing in the right direction when the time comes to do the swap and I will, gratefully, take you up on your kind offer.

Fizzer said:

EDC is not, at the moment anyway, causing a problem. I like the simplicity of the manual system. Thanks. I will, I am sure, need pointing in the right direction when the time comes to do the swap and I will, gratefully, take you up on your kind offer.

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No probs, HTH.

I think EDC is a reasonable "half way house"* so to speak - if No. 4 injector were available, I may have left EDC on mine until it failed in some irreparable way.

*- half way 'tween mechanical and common rail.