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1998 Mpi Running Issues After Restoration


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#106 leepol83

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Posted 21 November 2020 - 05:10 PM

The readings look OK. You need to let it warm up and then see what the stepper value is. With a cool engine and 30-32 steps, the engine may be in a satisfactory range for the stepper. It looks like the lambda sensor is switching. It may take 15 minutes or more to warm up in the drive way.


I did think that it’s may need to be upto temperature to be honest, once it’s warmed up what should the stepper be set to ?
Is it good that the lambs sensor is switching sorry I’ve no idea 🥴

#107 tmsmini

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Posted 21 November 2020 - 06:13 PM

This information in the table  is embedded in the ACR, if you click and hold on a value the extra information is shown. The stepper should be from 16-25 steps after adjustment. Mine always seems to creep up after a period of time.

 

MPi Information Screens with Rover Pod 3 (MEMS 2J)

1. Read Error Codes
2. Clear Error Codes
3. Actuators
4. Components
5. Stepper Adjust
6. Not Used for MPi
7. Exit Menu

 

 
1. RPM Revolutions per minute
2. Coolant temp Temp in ° C
3. Inlet Air Temp Temp in ° C Expect 20°  to 50°  on hot engine
4. MAP Sensor Strategy manifold pressure in kPA, expect 100 kPA Key on and 30 kPA at fast idle
5. Throttle Position Strategy throttle position (in ° ) dependant on pedal position, expect 4.5°  upwards
6. Throttle Switch (On or Off) depends on pedal position, expect off no load and on with load
7. Battery Voltage Strategy battery voltage in volts, expect nominal battery voltage (12.5 - 14.5) engine running
8. O2 Volts Bank 1 O2 volts Oxygen Sensor Bank 1 (pre-catalyst) in mV
9. Feedback BNK1 ST (On or Off)
10. Coil1 Chrg Time Time in mSec commonly referred to as "dwell" or coil "on" time
11. Coil2 Chrg Time Time in mSec commonly referred to as "dwell" or coil "on" time
12. Injector 2 P/W- Pulse width (in mSec) Injector duration or "on" time
13. Injector 4 P/W- Pulse width (in mSec) Injector duration or "on" time
14. Stepper Position Stepper motor position in steps, depends on idle control requirements, more steps indicate greater level of control
15. Crank Sync Reference data only
16. Cam Signal Reference data only
17. Ignition Switch Status on or off
18. Air Cond Request (Must have been used for Japanese export cars)
 

 


Edited by tmsmini, 21 November 2020 - 06:15 PM.


#108 leepol83

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Posted 21 November 2020 - 06:26 PM


This information in the table is embedded in the ACR, if you click and hold on a value the extra information is shown. The stepper should be from 16-25 steps after adjustment. Mine always seems to creep up after a period of time.

MPi Information Screens with Rover Pod 3 (MEMS 2J)

1. Read Error Codes
2. Clear Error Codes
3. Actuators
4. Components
5. Stepper Adjust
6. Not Used for MPi
7. Exit Menu




1. RPM Revolutions per minute
2. Coolant temp Temp in ° C
3. Inlet Air Temp Temp in ° C Expect 20° to 50° on hot engine
4. MAP Sensor Strategy manifold pressure in kPA, expect 100 kPA Key on and 30 kPA at fast idle
5. Throttle Position Strategy throttle position (in ° ) dependant on pedal position, expect 4.5° upwards
6. Throttle Switch (On or Off) depends on pedal position, expect off no load and on with load
7. Battery Voltage Strategy battery voltage in volts, expect nominal battery voltage (12.5 - 14.5) engine running
8. O2 Volts Bank 1 O2 volts Oxygen Sensor Bank 1 (pre-catalyst) in mV
9. Feedback BNK1 ST (On or Off)
10. Coil1 Chrg Time Time in mSec commonly referred to as "dwell" or coil "on" time
11. Coil2 Chrg Time Time in mSec commonly referred to as "dwell" or coil "on" time
12. Injector 2 P/W- Pulse width (in mSec) Injector duration or "on" time
13. Injector 4 P/W- Pulse width (in mSec) Injector duration or "on" time
14. Stepper Position Stepper motor position in steps, depends on idle control requirements, more steps indicate greater level of control
15. Crank Sync Reference data only
16. Cam Signal Reference data only
17. Ignition Switch Status on or off
18. Air Cond Request (Must have been used for Japanese export cars)


Excellent thank you for that, I’ll get her up to Temp and attempt to adjust the steps thanks again 👌🏻👍🏻

#109 tmsmini

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Posted 21 November 2020 - 06:46 PM

If your stepper value is between 16-25 when warm, then it requires no adjustment.

In my opinion, even if it is at the higher end by just a few steps, say up to 27 or 28, it should not seriously impact the engine running.



#110 leepol83

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Posted 21 November 2020 - 07:52 PM

If your stepper value is between 16-25 when warm, then it requires no adjustment.
In my opinion, even if it is at the higher end by just a few steps, say up to 27 or 28, it should not seriously impact the engine running.


Is that between 16/25 when upto full temperature ? I’m hoping that it’s out and by setting it sorts out my problem which at the moment is just the revs ever so slightly holding for a second or so when I gently rev it apart from that runs good

#111 tmsmini

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Posted 22 November 2020 - 03:27 PM

Yes, between 16-25 when warm. The ACR wont let you make adjustments until it is up to temperature. Yours appeared to be at 30 when not up to temp, so it should drop as it warms.






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