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Message: <blockquote data-quote="ReplicaR" data-source="post: 1440697" data-attributes="member: 9209">So, I took the car to a different shop for tuning. The previous tuner didn't work out for me, because driveability was terrible. Here is the list of what I left the car with.<ol> <li data-xf-list-type="ol">Tune Issues: <ol> <li data-xf-list-type="ol">Open loop tuning - The car is tuned in open loop for all operations, including idle and partial throttle. Makes is unadaptive in those conditions and hurts driveability. The idle and partial throttle should be using Closed Loop tuning maps with reference to O2 sensors. </li> <li data-xf-list-type="ol">High idle - Idle is currently set to about 1300 rpm in order to cope with driveability issues, needs to be just a bit under 1000 rpm. </li> <li data-xf-list-type="ol">Stall during high electrical loads - Whenever the fan kicks on, the idle speed will dip too low and the car will stall, most likely due to open loop tuning for idle </li> <li data-xf-list-type="ol">Stall during low speed maneuvering - While parking and operating brakes and steering, the often stalls, most likely due to open loop tuning for idle </li> <li data-xf-list-type="ol">Stall during cold idle - When the car is first fired up, it’s very touchy, difficult to move around, and stalls quite easily, most likely due to open loop tuning for idle </li> <li data-xf-list-type="ol">Stall during idle rev spike - When the throttle is spiked, the idle will dip too low upon return, and stall, most likely due to open loop tuning for idle</li> </ol></li> <li data-xf-list-type="ol">Things to Keep in Mind: <ol> <li data-xf-list-type="ol">Road Racing - This car is primarily used for road racing and track events. The tune must be safe enough not to have detonation issues with pump 91 octane. I’d prefer not to have to mix gasoline and have inconsistent mixtures. </li> <li data-xf-list-type="ol">Driveability - The car is still driven on the street to and from the events, and it’s extremely tiring to always pay attention to what the engine is doing, since it stalls far too easily. Please pay attention to driveability, make it as streetable as possible. </li> <li data-xf-list-type="ol">Hydroboost Conversion - The car has been converted to hydroboost system from a 96-04 V8 Mustang to keep up the brake demands. Since the 94-95 Mustang never came with hydroboost, this may create some issues for idle, but nothing that shouldn’t be tunable. </li> <li data-xf-list-type="ol">Before and After Numbers - Please make a couple of passes on the current tune, so I could have a point of reference as far as the numbers go of where it started and where it will be after the tuning is complete.</li> </ol></li> </ol></blockquote>