Question about 1998 GMC Jimmy
What or how many miles need to drive for the readiness test to pass for the emission test
All you need to do is get the engine up to normal temperatures, and a couple of miles should do it.
If you are failing, then check for a bad plug or plug wire, check the air mass sensor, temperature, and O2 sensor with ohmmeter. Bad ones usually go infinite or 0 ohms.
Air mass sensor can be clogged with foam from PVC, that can easily be cleaned.
To pass, you can put a variable potentiometer in series or parallel with O2 sensor, in order to force a pass. But don't run that way continually. Check resistence of O2 sensor when engine cold and hot. This will tell whether O2 sensor increases or decreases resistance with lack of O2 (rich mixture, like when cold). Then tweak resistance accordingly.
Posted on Jun 01, 2010
Well your emission test depends on the amount of carbon your car is letting out,, basically a catalysist convertor is whats helps your pass this,, in my country it 500 minles..
Posted on Jun 01, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Oct 17, 2015 | Chrysler Pacifica Cars & Trucks
Mar 14, 2015 | 2004 Nissan XTerra
Sep 12, 2014 | Pontiac Grand Prix Cars & Trucks
Jun 25, 2014 | 2000 Buick LeSabre
Feb 15, 2014 | 2003 Kia Sorento
A service technician will
turn off the dashboard "check engine" light after most repairs. This
resets the vehicle's emission system components to "not ready". The
status remains "not ready" until the vehicle's computer has had adequate
time to review the repaired component. This happens after the vehicle
is driven for a period of time established by the manufacturer.
If the vehicle's emissions system status is "not ready" when it is presented at the E-Check station during the initial test cycle,
a tailpipe emissions test may be conducted. If the vehicle is
transferred to another test type, the vehicle must remain on the
different test track until the vehicle passes the emissions test or
receives a waiver. For example, if the vehicle undergoes an OBD II test
and fails, it cannot be downgraded to a tailpipe test on a re-test; the
vehicle must pass the OBD II test.
For initial and subsequent tests, if a dashboard light is on when the vehicle is presented at the E-Check station, the vehicle will fail the test.
How can the vehicle status be made ready?
When a vehicle is driven through its normal drive cycle, the computer reviews the emission control
system and if the vehicle was properly repaired, the system resets itself to ready. A normal drive
cycle includes operation at both cruising speeds and in stop-and-go traffic for up to a couple
weeks. This process should be followed before bringing the vehicle in to be tested.
May 25, 2011 | 1999 Plymouth Voyager
Feb 13, 2010 | 1991 Saturn SL1
Dec 10, 2009 | 2002 Pontiac Grand Prix
Mar 18, 2009 | 2003 Mercedes-Benz CLK-Class
130 people viewed this question
Usually answered in minutes!