i have a 1996 4door 4x4, i have ot ge tit inspected by the 31st but every inspection station is saying the same thing. i have no codes yet its showing 3 not readys. but i can have 2 and pass. there saying the machine says its. evap, oxygen sensor and emmisons. anyone have any clue to what i might can do to get its to atleast pass.?

 

do a search for drive cycle, it'll tell you how to do it.

 

http://www.obdii.com/drivecycle.html

If you have it checked at an AZ make sure they don't do you any good deeds and reset.
Yea, don't dissconnect your battery for anything.

 

well my dad drove it today. and now it has the p0440 code that it had when we bought it back in feb of 2010. back then a new gas cap didnt help and early this year i changed the fuel filter.

 

the p0440 code has been a thorn in my side for years!! it'll go away for a year or so, come back for a while, gone again. knock on wood its been off for 6 months or so now(i just jinxed it...)

 

A code P0440 could mean one or more of the following has happened:

• The gas cap is not installed or working properly
• The purge solenoid has failed
• The canister is plugged and not working properly

• Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
• Inspect the EVAP system for cuts/holes in tubes/hoses
• Inspect for damaged or disconnected hoses around the Evap purge solenoid
• Check and/or replace the sensor
• Check and/or replace the purge valve
• Have a professional use a smoke machine to detect leaks

 

^^ X2

Follow the flow chart exactly as indicated and you'll find the problem:

https://blazerforum.com/forum/diagno...plained-35145/

 

well the code disapeard. but it still wont pass. 3 not readys, evap, o2 heater sensor, and emmisons. so yea. iv tryed to get them to go threw there cycles and nothing. so now to go look for faulty lines or parts :/

 

If you still have 3 incomplete monitors, it means you did not perform the drive cycle in post #3 correctly. It must be followed exactly as written. If you don't, the monitors will not run and complete their tests. Looking for a problem before all of the monitors are complete is a total waste of time. Let the PCM check it, that's what the drive cycle does. There are certain things that the PCM monitors continuously, the rest are monitored only under certain driving situations. The drive cycle produces the situations that the PCM needs in order to run and complete each test. If all monitors pass, no SES light. If one or more fails, the SES light will come on, a DTC will be set in memory, and you can diagnose the problem. You don't need to do the steps in order, but each step needs to be completed exactly as written. This will force all monitors to run and complete their test.

 

well if she dont pass by the 15th of the month shes getting parked :/