Link G4 Link G4x PnP (1g and Vr4)

[cjkiii]

Link G4x Pnp Vr4 is only a plug and play ecu for 1G and Vr4

I won't be going into too much detail on the wiring in aftermarket sensors (Wideband, Intake Air Temp, Pressure etc.)
This will be geared to the software side of things.
Some information from this thread is taken directly from
lglracer https://www.dsmtuners.com/threads/linkecu-g4-guide.533820/#post-153909327 thread back in 2021

• Ordering ECU
• Additional Sensors
• Initial Setup
• Limits/Safeties
• Fuel Map
• Ignition Map
• Idle Tuning
• Open Loop Boost Control
• Mixture Map
• STFT Closed Loop
• Launch Control

 

[cjkiii]

Ordering Ecu
​

• Before making your purchase contact the seller and make sure they can have the ecu modified for Knock Control ​
• VR4Link -VR4X (P/N SKU 223-4000​
• XS Expansion Loom(XSL) (P/N SKU 101-0106)​

 

[cjkiii]

Additional Sensors​

• Wideband 02 (I've only used AEM so i cant recommend anything else at this moment but any modern wideband 02 with a controller should work)
  Aem (Part # 30-0300)
• Pressure Sensors
  Aem 150psi (# 30-2130-150)
  Lowdoller 100psi (# 7990100)
• Flex Fuel Sensor
  Gm (# 13577379)
  ACDelco (#13507129)
• IAT Sensor
  Gm (# 25036751)
• Boost gauge
  Whatever gauge you like
  

 

[cjkiii]

Initial Setup​

• Turn the key to power on the car.
• Hit F3 or click on the Offline Button to connect to the ECU
• Click on unlock ECU and enter the Code you received from the dealer
• Now it is unlocked.
• Verify you have the latest firmware for your ecu.
  • ECU Controls > Update Firmware
• TPS Setup
  1. • Go to ECU Control > TPS Setup
     • It will say fully depress pedal press ok
     • Release pedal and press ok
     • TPS Sensor Calibrated
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  2. Map Sensor Setup
     • Map Sensor (On Board)
       • Go to ECU Control > Map sensor Calibration
       • It will calibrate and say its good.
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  3. IAT Setup
     • Go to ECU Settings > Analog Input > IAT – Inlet Air Temp
     • Source (This will be whatever An Temp you wired your sensor to)
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     • if you have the GM sensor, I just use the Std Bosch NTC Settings. Verify that your IAT temp is about the same temp as ambient air where the car is.
  4. Wideband Setup
     • If your using the stock O2 sensor location which is Pin 4(You can wire it to any An Volt)
     • Go to ECU Setting > Analog Inputs > Lambda 1
     • Lambda Sensor Control > An Volt(x) (x = Whatever An Volt pin used)
     • Click on Calibration and select your WB if available.
     • If not available, select one of the Cal 4-6 options. Verify the Cal tables are not used by another parameter. Then go to that table and enter the values from the manual of the WB sensor. Adjust the values once running to get the WB to match the gauge.
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  5. Fuel Setup:
     • ECU Settings > Fuel > Fuel Setup > Fuel Main
     • Fuel Equation Mode = Modelled
     • Base fuel pressure = Your base fuel pressure
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  6. Injector Setup:
     • ECU Settings > Fuel > Fuel Setup > Injector Setup
     • This is where you will input data from your injectors.
     • Fudge factor leave at 1.0
     • Short pulse width adder LEAVE BLANK IF YOU DONT HAVE THE DATA
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[cjkiii]

Limits/Safety​

• Ecu setting > Engine Protection > ​

• Rpm Limit (Cut type to limit Rpm)
• Map Limit (Cut type to limit Map)
• Rpm Limit Table (Actual RPM limit, X and Y are configurable)
• Map Limit Table (Actual Map limit, X and Y are configurable)
  
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[cjkiii]

Fuel Map​

• Ecu settings > Fuel > Fuel Table 1​
  • This is where all your fuel will be tuned (Get familiar with this table)​
  • X and Y are configurable (I use MGP instead of Map)

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    ​

 

[cjkiii]

Ignition Map​

• Ecu settings > Ignition > Ignition Table 1​
  • This is where all your Timing will be tuned (Get familiar with this table)​
  • X and Y are configurable (I use MGP instead of Map)
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[cjkiii]

Idle​

• Ecu settings > Idle sped control
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[cjkiii]

Boost Control​

• Ecu Settings > Boost Control
  

  • I like to setup my boost tables (X=Rpm Y=Gear) this lets you adjust boost per gear without having to mess around with boost trim per gear.​
  • For Pmw Frequency I've found at 60hz with a 3port mac valve gives me great boost control.​
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    ​

 

[cjkiii]

Mixture Map​

• Top Tool Bar > Tuning > Mixture map​
  • Mixture map will show the difference in actual Lambda/AFR to Requested AFR.​
  • You will need to have datalog to populate the Mixture Map​
    • Good idea to disable CLL(closed loop lmabda) as Mixture Map wont take into account fuel being added or subtracted by CLL​
    • 
      

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      ​
  • Mixture Map allows you to quickly tune areas where your fuel is off​
    • Every cell will have to be edited individually(No highlighting the whole map) ​
  • Target AFR vs Actual AFR = Error​
    • Target AFR 14.8 but actual AFR is 13.2 That makes a 1.6 Error​
  • Hover over cell, right click and select "Correct Fuel Table" to adjust the cell​

 

[cjkiii]

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[donniekak]

Honest question, I have a buddy that works at linkecu.

Why did you choose their product out of several options?

 

[cjkiii]

Honest question, I have a buddy that works at linkecu.

Why did you choose their product out of several options?

Its plug and play and extremely simple and easy to use. I didnt link DSMlink software at all.

 

[donniekak]

Its plug and play and extremely simple and easy to use. I didnt link DSMlink software at all.

The fact that you don’t need to make or have made a harness seems to be one of their best selling points.

 

[Elpizer2]

Hi guys. I think ecmlink is over priced and it's the same old ECU. You can't have new features or resolution

 

[donniekak]

Hi guys. I think ecmlink is over priced and it's the same old ECU. You can't have new features or resolution

I wouldn’t go that far. Plenty of us have run Dsmlink in pretty high powered cars. It does have a limited number of programmable ins and outs, but it does have them. Dsmlink is less than 1/3 the cost of most aftermarket ecu’s. It isn’t 1/3 as functional though, probably around 1/2-3/4 the functionality.

I do understand people wanting a newer tech Ecu with more features. But Dsmlink is far from overpriced junk that doesn’t work well.

 

[cjkiii]

Is there a reason as to why i can no longer edit my post on here? Was hoping to get things updated