A technically bad remap vs a good remap.

Unfortunately, there are many “tuners” out there who claim to be so-called “professionals” who do not understand the ECU’s and cars they claim to be able to modify.

Sure they can modify them, but can they modify them correctly? Unfortunately, in my experience when looking at customers cars who have already had their car remapped its quite disappointing and shocking to see what changes have been made to the software dump from the ECU. Hence why they have then seeked advice or help elsewhere and visited us at AceECU.

In particular diesel engines can take a fair amount of abuse due to the low compression and strong steel lump at the heart of the car, after one of these poor remaps the car will run seemingly without problems perhaps (but usually over-fueling, losing control of boost are common side effects). Sure there will be a noticeable power gain but at what costs and how has the power been achieved? Is it correct when understanding the vehicle, the components and the way the ECU works?

Unfortunately there is tuning software available which makes modification accessible to a larger audience, by adding a percentage to a set of maps. The “tuner” then may suggest 25%+ increase across all maps will deliver 25% more power, unfortunately it is not that simple. However these “professionals” still sell the tune files or remapping services to the poor end-user who not knowing any better will be happy with the results.

This is why i’ve wrote this short article.

The ECU contains a set of “maps”, in perhaps up to 3-4 databanks which differ by example, whether the car is a manual or automatic vehicle or has a sport button present such as many Vauxhalls. Sure anyone can jump in and start modifying these, but knowing what to change and why is what separates ourselves from these other “professionals” in the chiptuning/remapping industry.

At the very least there is a Drivers wish map, which relates to the throttle position sensor and amount of fuel requested… more often than not the drivers wish map is increased throughout the whole throttle position sensor range, but when aiming for max power or acceleration… we should only adjust near the wide open throttle maps, of course modifications across the range can be made to suit different driving styles but using a program to increase all values by a given percentage achieves nothing.

Secondly we have the torque limiter map, this limits the amount of fuel injected depending on RPM of the car in relation to the torque required. This increased too much at low RPM will give big problems wearing out clutches and flywheels on a stock car very quickly. Knowing the safe ft-lb capability of your clutch, standard or modified allows us to fine tune adjustments to ensure your clutch is not operating beyond its safe parameters.

After this is the smoke limiter map, this limits the amount of fuel by the amount of air entering the engine… this is commonly modified incorrectly with excessive Air Fuel ratios or often running too lean… in all cases, the smoke limiter map should be set higher than the torque limiter map… this is because air is not constant, and by having the car rely on adjusting fueling via the air means that drive-ability issues may occur.

Often there are other limiters across the range of maps, from temperature, injector duration, injection timing and more which are overlooked or incorrectly modified but I believe I have given a brief enough description of what is particularly wrong with many bad remaps.

Thank you for taking the time to read this article and may it help you decide what route you wish to take. Here at AceECU All of our files are bespoke for the vehicle in question, we have an in-depth knowledge of the limiters and calculations made by the ECU and access to technical documentation for turbo charger applications, injectors and other Mechanical/Electronic/ECU schematics to ensure we give the best SAFE performance gains for our customers.

Written by Lee Whitehouse, 26th November 2012.

Golf MK4 GT TDI 1.9 PD150 ARL Dyno Remap Results

Here is a power run by one of our customers, Craig from uk-mkivs.net‘s Golf MK4 GT TDI 1.9 PD150 results.

image

After originally purchasing an “off the shelf” remap he was disappointed and came to us looking for more power, when looking at the original file it was no wonder the car was going into limp mode, over fueling and generally running unefficiently. We reverted back to a stock file for his car and he also opted for the added feature of launch control.

Achieving 213.3bhp at around 4000rpm and 363.4lbft torque at 2600rpm he was ecstatic with his results and wanted to share them. So here they are!

Tuning Articles by Stewart Sanderson.

Stewart at Motorsport Developments shared this information at their website. Stewart Sanderson has been writing his own technical articles and tuning articles for international magazines like Fast Ford. (www.fastfordmag.co.uk) so listed here are various examples of his technical articles and tuning articles, they are very informative and a truely great read. The content in no way belongs to AceECU.

TurboCharger Efficiency.

TurboCharger Efficiency technical article.

Compressor maps

Compressor mapstechnical article.

All about fuel pressure.

All about fuel pressure technical article.

Boost Controllers.Boost Controllers technical article.

Spark Advance.

Spark Advance technical article.

All about Camshafts.

Camshafts technical article.

All about cam timing.

 

cam timing tuning article.

Engine management: Part 1.

Engine management technical

article: Part 1.

Engine management: Part 2.

Engine management technical

article: Part 2.

Engine management: Part 3.

Engine management technical article: Part 3.

Cylinder head tuning.

Cylinder head tuning article.

Exhaust system tuning.

Exhaust system tuning article.

All about the Ford CVH Turbo.

All about the Ford CVH Turbo.

All about the Ford I4.
All about the Ford I4.

All about the YB & Zetec.
All about the YB & Zetec.

All about mapping. Part 1.

All about mapping technical article. Part 1.

All about mapping. Part 2.

All about mapping technical article. Part 2.

All about mapping. Part 3.

All about mapping technical article. Part 3.

All about mapping. Part 4.

All about mapping technical article. Part 4.

Ten common Cosworth faults.

Ten common Cosworth faults.

All about Dynos.

All about Dynos technical article.

What is Horsepower & Torque?

What is Horsepower & Torque?

A technical article.

Ten common Rs Turbo faults.

Ten common Rs Turbo faults.

Intercooling.

Intercooling technical article.

Difference Between Turbocharged & NASP engines.

Difference Between Turbocharged & NASP engines. A Technical Article.

Exhaust gas temperature.
Exhaust gas temperature

technical article.

 

Compression Ratio. Part 1.
Compression Ratio technical article. Part 1. 

Compression Ratio. Part 2.

Compression Ratio technical article. Part 2.

Compression Ratio. Part 3.

Compression Ratio technical article. Part 3.

Bosch Fuel Injection. Part 1.

Bosch Fuel Injection technical article. Part 1.

Bosch Fuel Injection. Part 2.

Bosch Fuel Injection technical article. Part 2.

Bosch Fuel Injection. Part 3.

Bosch Fuel Injection technical article. Part 3.

Engine Breathers.

Engine Breathers technical article.

Spark Plugs.

Spark Plugs technical article.

Engine Cooling.

Engine Cooling technical article Pt1.

Engine Cooling.

Engine Cooling technical article Pt2.

Brake Fluid.

Brake Fluid technical article.

Turbo Diesels.

Detonation technical article.

Detonation Part 2.

Detonation technical article Pt2.

Turbo Diesels.

CAN BUS technical article.

Turbo Diesels.

Turbo Diesels technical article.

Track Day Prep Pt1.

Track Day Prep Pt1.

Track Day Prep Pt2.

Track Day Prep Pt2.

Instrumentationo

Instrumentation

Escos Small Turbo vs Large Turbo

Escos Small Turbo vs Large Turbo

Fuel Systems

Fuel Systems

Engine - road to race

Road To Race Car – Engine

Transmissions - road to race

Road To Race Car – Transmission

Air Fuel Ratios

Air/Fuel Ratios Part 1

Air Fuel Ratios

Air/Fuel Ratios Part 2

Fuel Systems

Traction Control/Safety Systems

Air Fuel Ratios

Petrol Fuel Injectors

Anti-Roll Bars

Anti-Roll Bars

Water Injection

Water Injection

All The Small Things

Small Turbo Escort Cosworth common faults

Filters
Diesel Particulate Filters

Common Rail Diesel Injection

Common Rail Diesel Injection

Exhaust Gas Recirculation

Exhaust Gas Recirculation

Diesel Engine Management Sensors

Diesel Engine Management Sensors

Engine Management Systems

Engine Management Systems

Air Injector Systems

Air Injector Systems

Air Injector Systems

Turbocharger Wastegates

Air Injector Systems

Turbo Vs Superchargers

Air Injector Systems

Compound Charging

Air Injector Systems

OBD Port Remapping

Air Injector Systems

Clutch Systems

Vauxhall-Opel Fault/Error Codes

Below is a list of Vauxhall/Opel diagnostic error codes for your reference.

P0030 O2 Sensor Heater Circuit Range/Performance (Bank 1 Sensor 1) C-29
P0036 O2 Sensor Heater Circuit Range/Performance (Bank 1 Sensor 2) C-31
P0100 Mass or volume air flow circuit high input C-10
P0100 Mass or volume air flow circuit low input C-10
P0110 Intake Air Temperature Circuit High Input C-12
P0110 Intake Air Temperature Circuit Low Input C-12
P0115 Engine Coolant Temperature Circuit High Input C-11
P0115 Engine Coolant Temperature Circuit Low Input C-11
P0115 Engine coolant temperature circuit malfunction C-11
P0120 Throttle Position Sensor (TPS) Circuit 1 Voltage High C-09
P0120 Throttle Position Sensor (TPS) Circuit 1 Voltage Low C-09
P0120 Throttle Position Sensor 1-2 Correlation C-09
P0130 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1) C-30
P0130 O2 Sensor 1 Circuit Voltage Low C-30
P0130 O2 Sensor 1 Open Circuit C-30
P0130 O2 Sensor 1 Incorrect Signal C-30
P0134 O2 Sensor Circuit Open (Bank 1 Sensor 1) C-30
P0135 O2 Sensor Heater Circuit High Voltage (Bank 1 Sensor 1) C-29
P0135 O2 Sensor Heater Circuit Low Voltage (Bank 1 Sensor 1) C-29
P0135 O2 Sensor Heater Circuit Open (Bank 1 Sensor 1) C-29
P0136 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2) C-32
P0136 O2 Sensor 2 Circuit Voltage Low C-32
P0136 O2 Sensor 2 Open Circuit C-32
P0139 O2 Sensor 1 Incorrect Signal C-30
P0140 O2 Sensor 2 Incorrect Signal C-32
P0141 O2 Sensor Heater Circuit High Voltage (Bank 1 Sensor 2) C-31
P0141 O2 Sensor Heater Circuit Low Voltage (Bank 1 Sensor 2) C-31
P0141 O2 Sensor Heater Circuit Open (Bank 1 Sensor 2) C-31
P0170 Rich Exhaust C-30
P0170 Lean Exhaust C-30
P0201 Cylinder 1 injector circuit high C-23
P0201 Cylinder 1 injector circuit low C-23
P0201 Cylinder 1 Injector Circuit Open C-23
P0202 Cylinder 2 injector circuit high C-24
P0202 Cylinder 2 injector circuit low C-24
P0202 Cylinder 2 Injector Circuit Open C-24
P0203 Cylinder 3 injector circuit high C-25
P0203 Cylinder 3 injector circuit low C-25
P0203 Cylinder 3 Injector Circuit Open C-25
P0204 Cylinder 4 injector circuit high C-26
P0204 Cylinder 4 injector circuit low C-26
P0204 Cylinder 4 Injector Circuit Open C-26
P0219 Engine overspeed condition C-43
P0220 Throttle Position Sensor (TPS) Circuit 2 Voltage High C-09
P0220 Throttle Position Sensor (TPS) Circuit 2 Voltage Low C-09
P0220 Throttle Position Sensor 1-2 Correlation C-09
P0230 Fuel pump secondary circuit high C-07
P0230 Fuel Pump Relay Open Circuit C-07
P0300 Misfire Unidentified Cylinder Detected B-21
P0301 Cylinder 1 Misfire Detected B-22
P0301 Cylinder 1 Misfire Detected B-22
P0301 Cylinder 1 Misfire Detected B-22
P0302 Cylinder 2 Misfire Detected B-22
P0302 Cylinder 2 Misfire Detected B-22
P0302 Cylinder 2 Misfire Detected B-22
P0303 Cylinder 3 Misfire Detected B-22
P0303 Cylinder 3 Misfire Detected B-22
P0303 Cylinder 3 Misfire Detected B-22
P0304 Cylinder 4 Misfire Detected B-22
P0304 Cylinder 4 Misfire Detected B-22
P0304 Cylinder 4 Misfire Detected B-22
P0325 Knock Sensor 1 Circuit no Signal C-27
P0335 Crankshaft Sensor Incorrect Signal C-06
P0335 Crankshaft Sensor Open Circuit C-06
P0335 Crankshaft Sensor Incorrect Signal C-06
P0340 Camshaft Position Sensor Circuit No Signal C-13
P0340 Camshaft Sensor Incorrect Signal C-13
P0351 Ignition Coil 1 High Input B-23
P0351 Ignition Coil 1 Incorrect Signal B-23
P0352 Ignition Coil 2 High Input B-23
P0352 Ignition Coil 2 Incorrect Signal B-23
P0353 Ignition Coil 3 High Input B-23
P0353 Ignition Coil 3 Incorrect Signal B-23
P0354 Ignition Coil 4 High Input B-23
P0354 Ignition Coil 4 Incorrect Signal B-23
P0420 Catalyst Efficiency Above Threshold C-31
P0443 Evaporative emission control system purge control valve circuit shorted C-28
P0443 Evaporative emission control system purge control valve circuit shorted C-28
P0443 Evaporative emission control system purge control valve circuit open C-28
P0460 Fuel Level Sensor Circuit High Input C-14
P0460 Fuel Level Sensor Circuit Low Input C-14
P0460 Purge flow sensor circuit malfunction C-14
P0500 Vehicle speed sensor malfunction B-10
P0530 A/C Refrigerant Pressure Sensor Circuit High Input Air Conditioning System B-05
P0530 A/C Refrigerant Pressure Sensor Circuit Open Air Conditioning System B-05
P0560 System Voltage High Input C-04
P0560 System Voltage Low Input C-04
P0565 Cruise Control SET and RESUME active C-17
P0566 Cruise Control Off Signal Circuit no or Incorrect Signal C-17
P0567 Cruise Control Resume Signal High Input C-17
P0568 Cruise Control Set Signal Circuit High Input C-17
P0571 Brake Switch Circuit Low Input C-15
P0602 Powertrain Control Module Not Programmed C-02
P0602 Security Code Not Programmed C-02
P0602 Vehicle Identification Number Not Programmed C-02
P0602 Variant-Coding Not Programmed C-02
P0606 Control Unit Re-Initialisation C-02
P0650 Malfunction Indicator (MI) Control Circuit High C-36
P0650 Malfunction Indicator (MI) Control Circuit Open C-36
P0700 EOBD Error stored by Transmission Control (TC) Modul B-06
P0700 MIL request from Transmission Control (TC) Modul B-06
P0704 Clutch Switch Input Circuit High Input C-16
P1110 Variable Intake Manifold Signal High C-33
P1110 Variable Intake Manifold Signal Low C-33
P1110 Variable Intake Manifold Open Circuit C-33
P1120 Accelerator Pedal Position Sensor 1 High Input C-08
P1120 Accelerator Pedal Position Sensor 1 Low Input C-08
P1120 Accelerator Pedal Position Sensor 1-2 Correlation C-08
P1122 Accelerator Pedal Position Sensor 2 High Input C-08
P1122 Accelerator Pedal Position Sensor 2 Low Input C-08
P1130 O2 Sensor 1 Signal Out of Range C-30
P1130 O2 Sensor 1 Signal no Activity detected C-30
P1130 O2 Sensor 1 Signal Switching Time Error C-30
P1170 System too rich (Bank 1) C-30
P1170 System too lean (Bank 1) C-30
P1230 Main Relay Circuit Voltage High C-03
P1230 Main Relay Open Circuit C-03
P1326 Knock Control Maximum Spark Limit Cylinder 1 C-27
P1327 Knock Control Maximum Spark Limit Cylinder 2 C-27
P1328 Knock Control Maximum Spark Limit Cylinder 3 C-27
P1329 Knock Control Maximum Spark Limit Cylinder 4 C-27
P1372 Crankshaft Sensor Segment Error C-06
P1372 Crankshaft Sensor Adaption Error C-06
P1481 Fan Relay 1 Circuit High C-34
P1481 Fan Relay 1 Signal Low / Open Circuit C-34
P1482 Fan Relay 2 Circuit High C-34
P1482 Fan Relay 2 Signal Low / Open Circuit C-34
P1500 Electronic Throttle Control Motor Failure C-09
P1500 Electronic Throttle Control Motor Failure C-09
P1520 Powerstage Currentless C-02
P1525 Limp Home Position Error C-09
P1526 Throttle Position Adaption Error C-09
P1526 Throttle Position no Adaption C-09
P1526 Limp Home Adaption Error C-09
P1526 Lower Limit Adaption Error C-09
P1530 A/C Relay Voltage High Air Conditioning System B-10
P1530 A/C Relay Circuit Open Air Conditioning System B-10
P1540 Air Conditioning Pressure Invalid Signal Air Conditioning System B-10
P1540 Air Conditioning Pressure Signal High Input Air Conditioning System B-05
P1540 Air Conditioning Pressure Signal Low Input Air Conditioning System B-10
P1540 Air Conditioning Pressure Open Circuit Air Conditioning System B-05
P1540 Air Conditioning Pressure Invalid Signal Air Conditioning System B-10
P1550 Electronic Throttle Control Reduced Power C-09
P1550 Electronic Throttle Control Forced Idle C-09
P1550 Electronic Throttle Control Power Management C-09
P1550 Electronic Throttle Control Engine Stop C-09
P1551 Engine Torque Always Higher Than Expected C-02
P1555 Throttle Position Sensor (TPS) Load Signal not Plausible with Engine Load C-09
P1600 Reprogram or Replace Electronic Control Unit (ECU) C-02
P1606 Replace Electronic Control Unit (ECU) C-02
P1606 Replace Electronic Control Unit (ECU) C-02
P1606 Replace Electronic Control Unit (ECU) C-02
P1610 Security Code Not Programmed Immobiliser B-07
P1611 Wrong Security Code Entered Immobiliser C-02
P1612 Immobiliser No Or Wrong Signal Immobiliser C-05
P1613 Immobiliser No Or Wrong Signal Immobiliser C-05
P1614 Wrong Security Code received Immobiliser C-06
P1614 Wrong Security Code received Immobiliser C-06
P1615 Wrong Vehicle ID from Body Control Module C-40
P1616 Wrong Vehicle ID from Instrument Control Module C-40
P1650 Service Vehicle Soon Light Voltage High C-37
P1650 Service Vehicle Soon Light Voltage Low C-37
P1700 SVS request via CAN B-06
U2100 CAN-BUS Malfunction C-05
U2101 CAN-BUS Maximum Configuration List not Programmed C-05
U2104 CAN-BUS reset counter overrun C-05
U2106 CAN-BUS no Communication with TCM B-05
U2108 CAN-BUS no Communication with ABS/TC B-08