Mechanical Issues that prevent Good Tuning

[5.7ute]

Good idea for a thread Shawn.
An issue I have come across a fair bit is due to insufficient fuel pressure at the rail, especially on older cars. It has become that common that I always log fuel pressure when dialling in a car these days.

[WeathermanShawn]

Thanks Mick.

Good one. We will add it to our list.

[ChipsByAl]

Its not exactly a mechanical issue, but not having accurate injector information can be a problem also. The transmission\clutch needs to be in good condition before any WOT tuning. The vehicle being due for an oil change or even low on oil can abruptly stop the tuning process. Just some things that need to be checked before starting.
Al