Coding Injectors to Fix Rough Start - How to Adjust the Injector Compensation Rate on BMW

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Calibrating injectors on a BMW sounds like a big deal and could get very, very expensive if taken to a dealer or even an independent shop. The reason you would want to adjust the injector compensation rate would be after replacing your injectors, replacing the ECU or DME or swapping the engine in my case. Each computer is coded for the injectors on that engine and must be recoded in order to work properly. Normally this job would require ISTA or an Autologic tool which costs in the thousands. Fortunately, there is a cheaper way to calibrate the injectors using the tool above for only $50-60 which is much cheaper than even an hour of shop time. The car I'm performing this service on is a BMW Z4.

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