Using CCP1 and CCP2 to measure instant fuel consumption

[mystified]

duty var word
ansel0=%00000000 'all digital 
'ansel1=%00000000
 
 
trisa=%11111111 'set all port a pins to input cap1,cap2,cap3
trisb=%00000000 'set all port b pins as output
portb=%00000000 'set port b to all zero
trisc = 2 ' rc1=flta input(ground pin 16 to stop) pin 16 high to run
 
'capture mode
intcon =0 'interrupts off
tmr5h = 0 'clean high byte of tm5 counter
tmr5l = 0 'clean low byte
t5con = %00000001 ' prescale 1:1, int clock, tmr5 =on
 
cap1con=%01000101 ' enable caputure,pulse width measurement mode, 
'every rising o falling edge
cap2con=%01000101 
cap3con=%01000101 
 
where is the capture data go from here
 
' ovdcond=%00010010 'turn on / off pwm pins
'ovdcons=%00000000 
 
'pcpwm init
dtcon = %00000101 'set deadtime to -500ns
ptcon0 =%00000000 ' 1:1 postscaale,fosc/4 1:1 prescale, free run mode
ptperl =0
ptperh=1
pwmcon0= %01010000 'pwm[5:0] output enabled 0100pwm4,5 independent,
'pwm0,1,2,3 complementary
 
pwmcon1=1 'update enable,overrides sync w/time
 
ptcon1=%10000000 'pwm time base is on, counts up
fltconfig = %00000011 ' enable fault a, cycle-by-cycle mode
 
duty =100 ' 50% =800
PDC2L = duty.lowbyte 'main a fixed 50% duty cycle on pwm4,5
PDC2H = duty.highbyte 'independent pwm outputs.
 
main:
for duty = 900 to 100 step-1 ' 10% to 90%
PDC0L = duty.lowbyte 'register controls pwm1/0
PDC0H = duty.highbyte
PDC1L = duty.lowbyte 'register controls pwm3/2
PDC1H = duty.highbyte
PDC3L = duty.lowbyte 'register controls pwm6/7
PDC3H = duty.highbyte
pause 50
next duty
 
pause 500' 1/2 second delay between ramp up / down
 
for duty = 100 to 900 ' 90% to 10%
PDC0L = duty.lowbyte
PDC0H = duty.highbyte
PDC1L = duty.lowbyte
PDC1H = duty.highbyte
PDC3L = duty.lowbyte
PDC3H = duty.highbyte
pause 5
next duty
 
pause 500' 1/2 second delay between ramp up / down
 
goto main
 
end