I was talking about fuel injection to someone at work today and he suggested using a sierra ECU and remaping it.I replied that as far as i was aware it wasnt possible to remap one.He then told me that he once had a 91 k plate sierra that failed MOT on emissions and to get around it the garage adjusted the fuelling by remapping the ecu which was a Bosch unit.
If this is possible it may be another cheap alternative to megasquirt.Does anyone know if this is possible and if so where the software could be obtained from?
Paul.

If it is a pinto ECU, I don't think it can be remapped. I have heard of fitting a potentiometer between 3 of the wires to alter the mixture at different throttle settings to increase power - never could find out which wires though!

It was a 2000 dohc , the pot idea sounds like the ebay scams to me.I once read an article in a kit car mag about a company that remaps ecus and they were using citroen or puegot ones if i remember correctly, i think these would be motronic units.
If it is possible to get software it must be possible to do with the more basic units that are just fuel and ignition ecus in the same way as they can be chipped.
Paul.

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Originally posted by Mark Allanson
If it is a pinto ECU, I don't think it can be remapped. I have heard of fitting a potentiometer between 3 of the wires to alter the mixture at different throttle settings to increase power - never could find out which wires though!

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Many ECU have a trim facility to allow very minor adjustments to fueling at idle for emmisions -- not being a Ford person I haven't a scooby about the Ford ecu.
In any case this is just a fine adjustment not remapping.

" -- not being a Ford person I haven't a scooby about the Ford ecu."

I though you were a ford expert?

Some of the schemes involve adjusting the signal of the temp sensor or air flow meter to kid the unit that the air is colder and denser / more air flow so increase the fuel. I tried this on an EEC-IV with a circuit that gave a proportional signal. It was noticable at low rpm and small throttle openings that the fuel was being increased. A small adjustment gave a rise in tckover, to much adjustment gave black smoke and 8 stroking the engine. However no significant difference was noticed during driving. The problem with the kidding sensor approach is that the fueling algorithm as a whole needs to be understood otherwise a worse overall compromise may result.

I would suggest considering a MegasquirtnSpark-Extra rather than trying to modify the standard unit as it will probably be cheaper, give you full control and make available other features such as rev limiter, shift indicator etc.

Cheers,

Colin

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Originally posted by paulf
I was talking about fuel injection to someone at work today and he suggested using a sierra ECU and remaping it.I replied that as far as i was aware it wasnt possible to remap one.He then told me that he once had a 91 k plate sierra that failed MOT on emissions and to get around it the garage adjusted the fuelling by remapping the ecu which was a Bosch unit.
If this is possible it may be another cheap alternative to megasquirt.Does anyone know if this is possible and if so where the software could be obtained from?
Paul.

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I realise that the mixture can be tweaked in a number of ways but was thinking more of completely remapping from scratch as would be done with a megasquirt.
My mate at work reckons they used a lap top and had the software on a CD.
There must be everything in the ecu to do the job required if it is posssible to remap from scratch. It seemed a good idea to be able to use a standard ecu available from a scrappy , but it looks as if i will be using a Megasquirt.
Paul.

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Originally posted by jollygreengiant

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Originally posted by paulf
I was talking about fuel injection to someone at work today and he suggested using a sierra ECU and remaping it.

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britishtrident - 30/1/05 at 02:18 PM

quote:

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Originally posted by Mark Allanson
" -- not being a Ford person I haven't a scooby about the Ford ecu."

I though you were a ford expert?

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Not a Ford fan at all but having I know my way around just about any Ford built between the 1172 side valve and the CVH after that my knowledge is minimal.

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Rob Allison - 31/1/05 at 10:42 AM

It is possible to remap the ecu. But you will need to get the right model. You can get a programer from America that will allow you to change the main map. But its complicated. I'll try to find the web site for you.

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Rob Allison - 31/1/05 at 11:01 AM

Here is some of the tuning for the EEC iv and v.

http://www.eec-tuner.com/
http://www.vanaaken.com/europe/protuners/fordchiptuning.htm
http://www.mustang50magazine.com/techarticles/17682/

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CairB - 31/1/05 at 07:25 PM

Rob,

Good links.

Here's another:

http://www.kvitek.com/ford/

I remember looking into this but was discouraged by not being able to find any information on the data format. It was mainly the American car versions that have been decoded. From memory there was a do it yourself version that used a xilinx logic array. In the end I decided that a Megasquirt was the easiest route and gives the opportunity for extra features to be built in.

Cheers,

Colin

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paulf - 31/1/05 at 10:12 PM

Yes good links, I looked for some time yesterday but didnt find much usefull, however it seems that it is still easier and cheaper to use a megasquirt unit.
Its a pity as it would be good to be able to mod a comercially made unit .
Paul.

quote:

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Originally posted by CairB
Rob,

Good links.

Here's another:

http://www.kvitek.com/ford/

In the end I decided that a Megasquirt was the easiest route and gives the opportunity for extra features to be built in.

Cheers,

Colin

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Rob Allison - 3/2/05 at 12:41 AM

I'm getting a MSnS to replace my EECiv. Going to use an old ECU, remove the plug and wire it for the Megasquirt. This is so i can do a plug and play. Also the Ford wiring harness is neat, saves me making one up

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