Hi All: I know that the engine temp sensor (one of the many) signal the ECU and affects boost. The only on board guage (so far) for temp is water. If the temp guage is at or above half way I have to push real hard to get 1.1 - 1.2 on the LED boost guage. Stock chip and spring by the way. Is this by design or by fault? TIA as always, Mark Pollan, '86 5KCSTQ 254K Miles