Starts only after reload

[Remy van den Hoek]

Hi, I'm having a strange problem with my link g1 v10 ecu.

To get the car running, I perform a reload, the car starts but runs terrible (way to rich).

First step, is that I reduce the master fuel setting from 130 to 65, when I go lower the engine starts to stutter when I rev it. wide band AFR is now around 10.

Then I lower the values in the first row to around 65 till 75, AFR is now around 12/13.

I can now drive the car around the parking lot and its running smooth and idles fine, so I save the settings to my computer and to the ECU.

Now the problem, It won`t start again (cold or hot) until I perform the exact same steps from above (perform a reload etc.), while all the adjusted settings I made earlier are there.

The car is a VW Corrado 1.8L 8V 4cyl, t28 turbo, 500cc genesis injectors.

Running group injection and a distributor for spark.

Any ideas/suggestions in what I`m doing wrong?

Many thanks Remy.

LINK MEMORY DATA
Configuration
Row Steps = TPS+MAP    Priority = Cyl
AirCon Request = Low-High    Aspiration = Turbo
Dwell Mode = 4ms    Engine Configuration = General
Inj Mode = Group    MAP Sensor = External
Number of Cylinders = 4cyls    Temp Sensor = NTC
Limits
Advance Limit = 33°    MAP Limit = 230kPa
MAP Limit = Off    RPM limit = 6800rpm
Lambda
Shift RPM = 5000rpm    Closed loop Lambda = Off
    Lambda Targets Table
Target Area
    Idle    Cruise    Rows 4 & 5    Rows 6 & 7    Rows 8 & 9    Rows 10    
    84    78    82    83    85    87    
Utilities
Rpm Lockout = 500rpm    Overrun Vacuum = 24kPa
TPS High = 100    Temperature Switch = 94°C
Utilities - Drive A
Drive A Trigger = RPM    Drive A Sense = OFF->ON
Utilities - Drive B
Drive A Sw Point = 4000rpm    Drive B Trigger = RPM
Drive B Sense = OFF->ON    Drive B Sw Point = 4000rpm
Utilities - Launch Control
Launch Ctrl = Off    Launch RPM = 3000rpm
Utilities - Water Spray
Water Spray Trigger = %FF    Spray Sw Point = 70.2%FF
Idle Speed Control
Water Spray %DC = 50%    AirC Step = 10
Fan Step = 5    ISC Type = Solenoid
Idle Cold  = 70%    Idle Hot  = 60%
Idle RPM = 900rpm    Stepper Motor Direction = Normal
Fuel
Master = 65    Fuel Cut = Off
Fuel - Auxiliary
Injector Timing = -1    Clamp = 75kPa
AirC Enrich = 0    Cold Start = 36
Crank Decay = 20    Crank Enrich = 60
Hot Restart = 0    Inlet Air = 10
Prime Temp. = 20.0°C    Volts Correction = 15
Fuel - Accel
Accel Decay = 8    Enrichment Mode = MAP
WakeUp Pulse = 4    WakeUp Width = 210
Ignition
Ignition Type = Distributor    Ignition Coils = Single Coils
Knock Control
Static Ignition = 6    Knock Base Target = 60
Knock Control = On    Knock RPM Start = 2000
Boost Control
Knock RPM corr. = 20    Boost Hold = 80%
    Boost Table
Engine Speed (rpm)
    250    750    1250    1750    2250    2750    3250    3750    4250    4750    5250    5750    6250    6750    7250    7750    8250    8750    9250    9750    
MAP (kPa)
    200    200    200    200    200    200    200    200    200    200    210    210    210    210    210    210    210    210    210    210    
TPS Proportional = Off    Wastegate Base = 35
Wastegate RPM = 3200    Wastegate Sens. = 6
Boost Control - Antilag
Antilag = Off    Antilag Mode = Mode 1
Ign Retard = 20°
Fuel Table
    Fuel Table
Engine Speed (rpm)
    250    750    1250    1750    2250    2750    3250    3750    4250    4750    5250    5750    6250    6750    7250    7750    8250    8750    9250    9750    
TPS/MAP
15    65    65    65    78    78    78    78    78    78    78    78    78    78    78    78    78    78    78    78    78    
45    105    105    105    105    105    105    105    105    105    105    105    105    105    105    105    105    105    105    105    105    
75    108    108    108    108    108    108    108    108    108    108    108    108    108    108    108    108    108    108    108    108    
105    128    128    128    128    128    128    128    128    128    128    128    128    128    128    128    128    128    128    128    128    
135    132    132    132    132    132    132    132    132    132    132    132    132    132    132    132    132    132    132    132    132    
165    136    136    136    136    136    136    136    136    136    136    136    136    136    136    136    136    136    136    136    136    
195    140    140    140    140    140    140    140    140    140    140    140    140    140    140    140    140    140    140    140    140    
225    144    144    144    144    144    144    144    144    144    144    144    144    144    144    144    144    144    144    144    144    
255    148    148    148    148    148    148    148    148    148    148    148    148    148    148    148    148    148    148    148    148    
285    152    152    152    152    152    152    152    152    152    152    152    152    152    152    152    152    152    152    152    152    
Ignition Table
    Ignition Table
Engine Speed (rpm)
    250    750    1250    1750    2250    2750    3250    3750    4250    4750    5250    5750    6250    6750    7250    7750    8250    8750    9250    9750    
TPS/MAP
15    6    11    16    21    26    31    33    33    33    33    33    33    33    33    33    33    33    33    33    33    
45    6    11    16    21    26    31    32    32    32    32    32    32    32    32    32    32    32    32    32    32    
75    6    11    16    21    26    31    31    31    31    31    31    31    31    31    31    31    31    31    31    31    
105    6    11    16    21    22    24    26    28    28    28    28    28    28    28    28    28    28    28    28    28    
135    6    11    16    21    22    24    26    28    28    28    28    28    28    28    28    28    28    28    28    28    
165    6    11    16    18    18    18    20    21    28    28    21    22    23    23    23    23    23    23    23    23    
195    6    11    16    18    18    18    19    20    20    20    20    21    22    22    22    22    22    22    22    22    
225    6    11    16    18    18    18    18    18    19    19    19    20    21    21    21    21    21    21    21    21    
255    6    11    16    18    18    18    18    18    19    19    19    20    21    21    21    21    21    21    21    21    
285    6    11    16    18    18    18    18    18    19    19    19    20    20    20    20    20    20    20    20    20    

 

custom 05-05-16.pcl

[Remy van den Hoek]

This morning I tried setting Crank enrichment to the smallest number possible (30) which should give the most fuel while cranking. Still wouldn't start.

After this I tried setting the master fuel back to 115. Now she started but ran way to rich. Only after setting it back to 65 the engine started to ran normal again.

Should I set the master at about 80 and just lower the entire table a lot?

 

[neil brown]

lower the entire table

[Remy van den Hoek]

Ok thanks, I'll do that.

Is it beneficial to set the master fuel as low as possible or should I just leave it at 110 and lower the table from there?

To make sure adjustments can be made, I assume crank enrichment needs to be set somewhere in the middle, then set master fuel to a value on which the engine starts, followed by lowering the table to get a acceptable AFR. Is this a good approach?

[Simon]

You want the master to sit where the table numbers are in the mid range of the adjustment so around the 100 mark at mid power.

Get the main tune done fully and then go in and adjust crank enrichment.

Edited May 10, 2016 by Simon

[Remy van den Hoek]

Ok, thanks Simon. Going to try that!

[Remy van den Hoek]

You want the master to sit where the table numbers are in the mid range of the adjustment so around the 100 mark at mid power.

Get the main tune done fully and then go in and adjust crank enrichment.

Hi there, I did some tests last week and starting seems to be a little better now.

I started by setting the table to the numbers you suggested. To get the correct AFR I had to set master fuel to 130. The car would barely start when cold, but once hot I wasn't able to get it running again. 

My master fuel is now at 150, crank enrichment is 30 and hot restart is at 10. With these settings it will start after 3 or 4 times cranking the engine for a few seconds (hot and cold). 

The first fuel row goes from 30 till 45 and gives me around 14.5 AFR, to help AFR in idle I set the first ignition cells to around 16. The engine revs perfect and drives smooth around the parking (not allowed on road yet).

The MAP sensor (GM 3 bar) reads 103 kpa when the engine is off and 65 kpa in idle. I set clamp to 65.

I find it strange that I have to set the master this high just to get is started, and I still have the feeling that I`m missing something. 

The engine is a 1.8L 8V 4cyl, running a T28 turbo, 500cc genesis injectors @ 3.5 bar fuel pressure (stock pump feeds a sump with a bosch 044). Running group injection and a distributor and single for spark.

Thanks for still supporting such a old product, many companies could take a example from that! 

Edited June 7, 2016 by Remy van den Hoek