resetting the p8 ecu
15-01-2007, 10:15 AM
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resetting the p8 ecu
i read somwhere about resetting the p8 by disconnecting it then reconnecting it but then you have to rev the engine at a set rpm for so long before upping it.Anybody know what the routine is as i disconnected mine to fit the secs and now the idle is all over the place.
15-01-2007, 02:46 PM
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Originally Posted by cozmeister
1. Connect, or charge up your flat battery.
2. Start your car, do not touch or use the throttle. Leave to idle for 3 minutes.
3. Now hold the revs at 1200 rpm for 2 minutes.
4. Now drive your car for at least 5 minutes, at different speeds.
2. Start your car, do not touch or use the throttle. Leave to idle for 3 minutes.
3. Now hold the revs at 1200 rpm for 2 minutes.
4. Now drive your car for at least 5 minutes, at different speeds.
the P8 reset procedure is a bit more involved
lol
15-01-2007, 07:19 PM
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taken fron the GGR website 
The engine management system on the Large Turbo Escort has what is known as ‘adaptive learning’. This in simple terms means that the engine management system will make changes to the fuelling of the engine, based on the information it receives from many engine sensors.
Earlier models of the Cosworth had an adjustment screw to allow fine-tuning of the fuel mixture. The Escort Cosworth does not have this facility; the engine management system will make these adjustments itself. Over a period, the management system ‘learns’ where the fuelling isn’t correct, and applies a richening or leaning off adjustment to the fuelling at the relevant points in the fuel map. Unfortunately, many additional factors can affect the fuel mixture readings, and this can sometimes cause the management system to make an incorrect adjustment. If the adjustments made by the management system are too severe, the fuel mixture reading will fall outside of the operating range of the HEGO or Lambda sensor. If this situation occurs, the management system will be unable to readjust the mixture correctly. In this case, it will be necessary to re set the engine management system memory, and allow it to ‘re- learn’ the running strategies.
To re set the memory, you must carefully follow the following procedure (with the engine stopped and at normal operating temperature):
1) Locate the memory re set plug inside the engine compartment and remove the red cover (if fitted). On right hand drive vehicles this can be found between the battery and front suspension top mounting. There are three diagnostic plugs here, (see photo), the circular plug is the memory-reset plug. (On some models, this shape of plug is used to alter the ignition timing for different octane fuel).
2) Prepare three pieces of wire to connect the three connections of this plug together. DO NOT CONNECT TO THE PLUG YET.
3) You will need help to complete this part of the operation. Turn on the ignition, as if to start the engine. (Operate any immobilisation systems etc.) DO NOT START THE ENGINE. You will hear the idle stabiliser valve click slowly (about once per second). As soon as the ignition is switched on, (but not before), connect your three pieces of wire to the plug sockets to inter-connect all three terminals. This must be done quickly, after the ignition is turned on, but before the fuel pump stops priming the engine. After about seven seconds, the idle stabiliser will stop clicking. After a further twenty or thirty seconds, the idle stabiliser will click extremely quickly, then return to clicking once per second. When this happens it signifies that the management system Kept Alive Memory is erased. Turn off the ignition, and remove your wires from the sockets. Re fit the red plug cover and return the diagnostic plugs to their original position. Do not worry if this doesn’t happen first time, you may find it necessary to carry out the erasure procedure at least twice until the operation completes as described.
4) The management system now has to re learn its idle and slow running strategies. Allow the engine to idle for three minutes, then increase the speed to 1200 RPM and hold for two further minutes.
The engine management system should complete its learning strategy after approximately 5 miles of varied driving.
The engine management system on the Large Turbo Escort has what is known as ‘adaptive learning’. This in simple terms means that the engine management system will make changes to the fuelling of the engine, based on the information it receives from many engine sensors.
Earlier models of the Cosworth had an adjustment screw to allow fine-tuning of the fuel mixture. The Escort Cosworth does not have this facility; the engine management system will make these adjustments itself. Over a period, the management system ‘learns’ where the fuelling isn’t correct, and applies a richening or leaning off adjustment to the fuelling at the relevant points in the fuel map. Unfortunately, many additional factors can affect the fuel mixture readings, and this can sometimes cause the management system to make an incorrect adjustment. If the adjustments made by the management system are too severe, the fuel mixture reading will fall outside of the operating range of the HEGO or Lambda sensor. If this situation occurs, the management system will be unable to readjust the mixture correctly. In this case, it will be necessary to re set the engine management system memory, and allow it to ‘re- learn’ the running strategies.
To re set the memory, you must carefully follow the following procedure (with the engine stopped and at normal operating temperature):
1) Locate the memory re set plug inside the engine compartment and remove the red cover (if fitted). On right hand drive vehicles this can be found between the battery and front suspension top mounting. There are three diagnostic plugs here, (see photo), the circular plug is the memory-reset plug. (On some models, this shape of plug is used to alter the ignition timing for different octane fuel).
2) Prepare three pieces of wire to connect the three connections of this plug together. DO NOT CONNECT TO THE PLUG YET.
3) You will need help to complete this part of the operation. Turn on the ignition, as if to start the engine. (Operate any immobilisation systems etc.) DO NOT START THE ENGINE. You will hear the idle stabiliser valve click slowly (about once per second). As soon as the ignition is switched on, (but not before), connect your three pieces of wire to the plug sockets to inter-connect all three terminals. This must be done quickly, after the ignition is turned on, but before the fuel pump stops priming the engine. After about seven seconds, the idle stabiliser will stop clicking. After a further twenty or thirty seconds, the idle stabiliser will click extremely quickly, then return to clicking once per second. When this happens it signifies that the management system Kept Alive Memory is erased. Turn off the ignition, and remove your wires from the sockets. Re fit the red plug cover and return the diagnostic plugs to their original position. Do not worry if this doesn’t happen first time, you may find it necessary to carry out the erasure procedure at least twice until the operation completes as described.
4) The management system now has to re learn its idle and slow running strategies. Allow the engine to idle for three minutes, then increase the speed to 1200 RPM and hold for two further minutes.
The engine management system should complete its learning strategy after approximately 5 miles of varied driving.
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Cosworther (13-04-2018)
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16-01-2007, 07:38 AM
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Is there not some sort of tool from the likes of gunstons that you can get to do this - I remebr when I had the FRST engine in my XR2, I bought a Gunstons fault finder, and you couldf use it to reset the ecu also 
16-01-2007, 11:00 AM
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you can buy a sub loom from ford that does the job
very ecpensive for what it is though, about 12 quid for basically 3 x 3" lengths of wire connected to gether to a male end that fits in the socket on the car..
i have the finis cose in my hotmail account - but cant log on at the moment
very ecpensive for what it is though, about 12 quid for basically 3 x 3" lengths of wire connected to gether to a male end that fits in the socket on the car..
i have the finis cose in my hotmail account - but cant log on at the moment
30-01-2011, 06:47 PM
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My car cuts out at 4000rpm (MSD chip/map 3bar/Siemens 55).
I've made a diag and I found a default code 44 on my car.
I've tried this to reset it, but the car still cut at 4000rpm.
I heard well the idle valve clicking more quickly, and I though it was good...
I've made a diag and I found a default code 44 on my car.
I've tried this to reset it, but the car still cut at 4000rpm.
I heard well the idle valve clicking more quickly, and I though it was good...
06-02-2011, 09:52 AM
#17
I've found that life I needed.. It's HERE!!
Code 44 = EEROM ERROR
EEROM is an integrated part of the Motorola processor and is used to store some data.
That means a replacement ecu.
EEROM is an integrated part of the Motorola processor and is used to store some data.
That means a replacement ecu.
23-02-2011, 08:53 PM
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taken fron the GGR website
The engine management system on the Large Turbo Escort has what is known as ‘adaptive learning’. This in simple terms means that the engine management system will make changes to the fuelling of the engine, based on the information it receives from many engine sensors.
Earlier models of the Cosworth had an adjustment screw to allow fine-tuning of the fuel mixture. The Escort Cosworth does not have this facility; the engine management system will make these adjustments itself. Over a period, the management system ‘learns’ where the fuelling isn’t correct, and applies a richening or leaning off adjustment to the fuelling at the relevant points in the fuel map. Unfortunately, many additional factors can affect the fuel mixture readings, and this can sometimes cause the management system to make an incorrect adjustment. If the adjustments made by the management system are too severe, the fuel mixture reading will fall outside of the operating range of the HEGO or Lambda sensor. If this situation occurs, the management system will be unable to readjust the mixture correctly. In this case, it will be necessary to re set the engine management system memory, and allow it to ‘re- learn’ the running strategies.
To re set the memory, you must carefully follow the following procedure (with the engine stopped and at normal operating temperature):
1) Locate the memory re set plug inside the engine compartment and remove the red cover (if fitted). On right hand drive vehicles this can be found between the battery and front suspension top mounting. There are three diagnostic plugs here, (see photo), the circular plug is the memory-reset plug. (On some models, this shape of plug is used to alter the ignition timing for different octane fuel).
2) Prepare three pieces of wire to connect the three connections of this plug together. DO NOT CONNECT TO THE PLUG YET.
3) You will need help to complete this part of the operation. Turn on the ignition, as if to start the engine. (Operate any immobilisation systems etc.) DO NOT START THE ENGINE. You will hear the idle stabiliser valve click slowly (about once per second). As soon as the ignition is switched on, (but not before), connect your three pieces of wire to the plug sockets to inter-connect all three terminals. This must be done quickly, after the ignition is turned on, but before the fuel pump stops priming the engine. After about seven seconds, the idle stabiliser will stop clicking. After a further twenty or thirty seconds, the idle stabiliser will click extremely quickly, then return to clicking once per second. When this happens it signifies that the management system Kept Alive Memory is erased. Turn off the ignition, and remove your wires from the sockets. Re fit the red plug cover and return the diagnostic plugs to their original position. Do not worry if this doesn’t happen first time, you may find it necessary to carry out the erasure procedure at least twice until the operation completes as described.
4) The management system now has to re learn its idle and slow running strategies. Allow the engine to idle for three minutes, then increase the speed to 1200 RPM and hold for two further minutes.
The engine management system should complete its learning strategy after approximately 5 miles of varied driving.
The engine management system on the Large Turbo Escort has what is known as ‘adaptive learning’. This in simple terms means that the engine management system will make changes to the fuelling of the engine, based on the information it receives from many engine sensors.
Earlier models of the Cosworth had an adjustment screw to allow fine-tuning of the fuel mixture. The Escort Cosworth does not have this facility; the engine management system will make these adjustments itself. Over a period, the management system ‘learns’ where the fuelling isn’t correct, and applies a richening or leaning off adjustment to the fuelling at the relevant points in the fuel map. Unfortunately, many additional factors can affect the fuel mixture readings, and this can sometimes cause the management system to make an incorrect adjustment. If the adjustments made by the management system are too severe, the fuel mixture reading will fall outside of the operating range of the HEGO or Lambda sensor. If this situation occurs, the management system will be unable to readjust the mixture correctly. In this case, it will be necessary to re set the engine management system memory, and allow it to ‘re- learn’ the running strategies.
To re set the memory, you must carefully follow the following procedure (with the engine stopped and at normal operating temperature):
1) Locate the memory re set plug inside the engine compartment and remove the red cover (if fitted). On right hand drive vehicles this can be found between the battery and front suspension top mounting. There are three diagnostic plugs here, (see photo), the circular plug is the memory-reset plug. (On some models, this shape of plug is used to alter the ignition timing for different octane fuel).
2) Prepare three pieces of wire to connect the three connections of this plug together. DO NOT CONNECT TO THE PLUG YET.
3) You will need help to complete this part of the operation. Turn on the ignition, as if to start the engine. (Operate any immobilisation systems etc.) DO NOT START THE ENGINE. You will hear the idle stabiliser valve click slowly (about once per second). As soon as the ignition is switched on, (but not before), connect your three pieces of wire to the plug sockets to inter-connect all three terminals. This must be done quickly, after the ignition is turned on, but before the fuel pump stops priming the engine. After about seven seconds, the idle stabiliser will stop clicking. After a further twenty or thirty seconds, the idle stabiliser will click extremely quickly, then return to clicking once per second. When this happens it signifies that the management system Kept Alive Memory is erased. Turn off the ignition, and remove your wires from the sockets. Re fit the red plug cover and return the diagnostic plugs to their original position. Do not worry if this doesn’t happen first time, you may find it necessary to carry out the erasure procedure at least twice until the operation completes as described.
4) The management system now has to re learn its idle and slow running strategies. Allow the engine to idle for three minutes, then increase the speed to 1200 RPM and hold for two further minutes.
The engine management system should complete its learning strategy after approximately 5 miles of varied driving.
just tryd this on my escos p8 and the pump primes up breifly then the valve just clicks fast all the time????? ideas!!!!!!!
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Cosworther (13-04-2018)
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