installed new computer and now have to run a cycle for every system on truck to log into the computer so it shows up on diagnostics. Does anyone know how many miles to put on it, I don't want it to fail again and really don't have time to drive it 100 miles. Thanks for any help!

 

Should take 12 cold starts and 48 miles. I've had up to 300+ miles including many numbers of starts to fully do it. You might want to do an on board reset.

 

Hummmm.

Never heard of such a thing.

Interesting.

IndyD

 

Welcome to the forum. Sorry could not help never heard of this like indy there has not.

 

I'm thinking the computer is no good but not sure on it?

 

Let us know when you get it going properly, this way we can use this information in the future.

 

Thanks to all of you who commented! For those of you who haven't heard of this issue, what I have learned happens is, if you clear the trouble codes in any car, then try to go smog it, it wont pass because the smog test wants to read all the systems checks on your computer. sometimes you have a trouble light that doesn't come on for a bit after being cleared its because the computer checks all the cars systems when it running down the road and once it does that the light might come on again. Well I did have a computer failure and found a great online rebuilt computer that is flashed before they send it to you with your cars info and put it in, my eng light went away but the smog test failed because the systems hadn't run there checks. I have gone about 30 miles now with only 4 starts but Hydrashocker says I need more for all the systems to have time to run the diaonostics and log them into computer memory. I also heard taking a good run down the freeway and around town may be enough in some cars

 

emissions monitors is the broad term....look for "dodge drive cycle" fir a list of conditions needed to meet to complete them...

PS: I hate emission testing.

1/2 tank gas
The purpose of the OBDII drive cycle is to run all of the onboard diagnostics. The drive cycle should be performed after you have erased any trouble codes from the PCM memory, or after the battery has been disconnected. Running through the drive cycle sets all the system monitors so that subsequent faults can be detected.
The OBDII drive cycle begins with a cold start (coolant temperature below 122 degrees F and the coolant and air temperature sensors within 11 degrees of one another).
NOTE: The ignition key must not be on prior to the cold start otherwise the heated oxygen sensor diagnostic may not run.
1. As soon as the engine starts, idle the engine in drive for two and a half minutes with the A/C and rear defrost on. OBDII checks oxygen sensor heater circuits, air pump and EVAP purge.
2. Turn the A/C and rear defrost off, and accelerate to 55 mph at half throttle. OBDII checks for ignition misfire, fuel trim and canister purge.
3. Hold at a steady state speed of 55 mph for three minutes.
OBDII monitors EGR, air pump, O2 sensors and canister purge.
4. Decelerate (coast down) to 20 mph without braking or depressing the clutch. OBDII checks EGR and purge functions.
5. Accelerate back to 55 to 60 mph at half throttle. OBDII checks misfire, fuel trim and purge again.
6. Hold at a steady speed of 55 to 60 mph for five minutes.
OBDII monitors catalytic converter efficiency, misfire, EGR, fuel trim, oxygen sensors and purge functions.
7. Decelerate (coast down) to a stop without braking. OBDII makes a final check of EGR and canister purge.

 

Never seen that list to run down and I don't doubt it considering the new PCM.


Like I said sometimes I've had to do more but mostly it's done with the 12 cold starts and 48 miles broad spectrum driving.


Durrango<---------What are you not passing on emissions?

 

If you see the GM and ford drive cycles you will be happy with that especially happy with your method.

PS I hate emissions testing....all BS a money making