![]() Mugen recognizes this and does not have a knock sensor (input on their ECU).ġC. It is not designed to compensate for detonation under boost and may be fooled by forged pistons rattling into retarding the ignition when knock is not present. The chips are popular with engine swaps because they eliminate most error codes caused by poor wiring.The stock knock sensor is designed to compensate for different qualities of fuel, and has a limited scope of adjustment. Typically these chips disable error reporting for most sensors and give about 40 % worse fuel economy. Most (but not all) plug in chip replacements claim to be a 'Mugen' program. Manifold Absolute Pressure or MAP which monitors air flow (Y axis), RPM (X-axis), and Ignition Advance/Retard from Baseline Timing (Z-axis). What do these ECU program's commands look like?Įxample of a 3 dimensional ignition table of program commands (or "ignition map"): The programmer can also remove or inactivate the sensor CEL warning codes and move the VTEC point, redline, and speed limiter points to anywhere you like. The amount of ignition timing and fuel delivery is changed for a given air flow and rpm compared to the stock program. When you get a new chip, the programmer has changed the program's commands of the ignition map and fuel map in response to a change in air flow and rpm (ie. The ECU also activates your other CEL error codes and controls A/C & Idle/EVAP inputs/outputs. Activates the opening of the secondary runners' valves based on the IAB vacuum input, if you have a dual stage IM (eg. Second O2 sensor CEL warning in OBD 2 and OBD 2b cars for testpipes and high flow cats and closed loop operations Speed limiter (JDM and European models) ignition map (program commands for how much spark timing to advance or retard from the baseline ignition timing you set at the distibutor cap at each rpm) program commands for how much fuel to add at each rpm) and sequential firing of the injectors Second, What does an ECU do and what am I doing when I get a new chip ? They are selling them based on the attractiveness of convenience for unsuspecting people who don't have a local programmer and dyno, the hyped hp gains from the magazine articles or ads, and a lower cost compared to other significant hp gain modifications, like cams or an intake manifold (IM).ġB. Then there are the programmers who take advantage of import enthusiasts who do not understand the performance difference between a pre-programmed, mail-order chip versus a chip tuned and programmed on your car at a dyno. They are now trying to recover the money lost from an obsolete or incompatible chip. It made very little power for them, or likely made their engine run too rich, or both. Other enthusiasts made the mistake of buying a chip too early that was not programmed correctly for the unique way their engine package breathes. The reason you see so many chips for resale on ebay?: It's supposed to be one of your last modifications and not one of your first, to prevent the need for multiple chip reprogrammings after each addition of a new modification. So please do not get your chip reprogrammed just after i/h/c/e, if you later plan on going for bigger & better things in the future. any power gains from the chip are eliminated). , since these parts just render your "new" ECU program obsolete and useless (ie. I have no clue if this is only possible on specific versions or not, I have not tried.Īnother method is just using pcmhammer then changing the key to a factory value and writing back to the ecu which should allow hptuners to open it happily.There is no point in getting a new ECU program early in your engine build up and then later upgrading to bigger lift and duration cams, or larger injectors, bigger fuel pump, or an aftermarket IM/bigger bore TB, etc. Basically you are licensing the ECU without overwriting it, which then allows you access to the original file as you have licensed that vin/serial. ![]() I personally have not done this, I am just passing on the information that was passed to me. They then stop/prevent HPTuners from actually performing the write procedure, close the application and then reopen the program and load in the original ECU file which removed the lock error. ![]() I have had previous customers indicate they have loaded up a previously license HPT file, gone to write the file to the ECU which causes the "you must license this ecu" message to appear on screen, to which they accept to license the ECU. The "this ecu has been locked by another tuner" occurs because HPTuners detects that the seed/key are not the factory combination and that you have not licensed that ecu, thus makes the assumption you are not the original tuner and does not let you view or edit that file. ![]() That's your problem! Good Call Gampy haha. ![]()
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