Super slow (20 seconds) data from UART OBD II connector.

I'm making a speedometer with some nixie tubes that I have connected with serial. I'm using the supplied library for the car connector and I'm using the mega 2560 so I can have multiple hardware serial connections. I originally did this with software serial and switched to see if that was the problem. I am receiving updates for speed maybe every 20 seconds. Here is my code:

[code]

#import <Arduino.h>

#include <OBD.h>


int ones = 0;
int tens = 0;

int kphValue = 0;
int mphValue = 0;

int rpmValue = 0;

COBD obd;

void setup(){


Serial2.begin(9600);
obd.begin();
//initiate OBD-II connection until success
while (!obd.init()){
Serial2.print("$0,Y,Y,255,255,000,000$0,Y,Y,255,255,000,000!");
delay(1000);
Serial2.print("$0,Y,Y,000,000,000,000$0,Y,Y,000,000,000,000!");
delay(1000);
}

}

void loop(){

obd.read(PID_RPM, rpmValue);
delay(100);

obd.read(PID_SPEED, kphValue);
delay(100);
kphToMPH();

String onesString = String(ones);
String tensString = String(tens);
String payloadString;
if(rpmValue<3000){
payloadString = "$" + onesString + ",N,N,255,000,255,000$" + tensString + ",N,N,255,000,255,000!";
Serial2.print(payloadString);
}
else if(rpmValue>=5000){
payloadString = "$" + onesString + ",N,N,255,255,000,000$" + tensString + ",N,N,255,255,000,000!";
Serial2.print(payloadString);
}
else if(rpmValue>=3000){
payloadString = "$" + onesString + ",N,N,255,255,030,000$" + tensString + ",N,N,255,255,030,000!";
Serial2.print(payloadString);
}

}

void splitDigits(int input_number)
{

ones = (input_number%10);
tens = ((input_number/10)%10);

}

void kphToMPH()
{

mphValue = kphValue * 0.621371;
splitDigits(mphValue);

}
[/code]