Hi George,

thank you for the reply !

Well, I´m using all 16f877's as described bellow :

1) TMR0 => Count the number of pulses from the car's wheel.
2) TMR1/CCP1 => measure the Feel Injector's "On-Time"
3) TMR2 => This timer is used as a 500ms time base for all calculation and display update.

I´m using DT Interrupts to deal with the timers.

May be use the RB change pin interrup to count the RPM events.

I´m planning to move my project to the ST7735 display, and use the Richard libs available here in the forum. SO, I should move to a 18F series Pic.

I have here with me, some 18F2420, 18F4550 and 18F2520. I'll try to some of them.

My best regards !

Sérgio