Will not pass emissions test

Can you remember how many miles you have driven since the engine was installed? What I mean is that if you have a good running engine and have a new converter, sometimes the easiest things are the ones overlooked. Check your air filter to make sure it isn't dirty and restricting air flow. Also check your spark plugs to see what kind of shape they are in and if they are burning clean. Spark plugs can tell a lot. If you had transfered any emission related parts from the old engine to the new, maybe one of those items has an issue or is clogged. I hope this helps. Good luck.

CHECK ENGINE LIGHT ON. CODE READS PURGE SOLENOID. MAKE SURE FUEL CAP IS TIGHT. UNDER HOOD ON TOP OF ENGINE YOU WILL SEE A GREEN PLASTIC HOSE WITH A SCREW ON CAP AND VALVE. THIS IS WHERE SMOKE IS PUMPED INTO FUEL TANK AND LINES TO FIND WHERE FUEL VAPORS CAN LEAK INTO ATMOSPHERE. THIS IS FOR EMISSIONS ONLY.IF IGNORED WILL HAVE NO EFFECT ON ENGINE PERFORMANCE, BUT IF YOU HAVE TO PASS EMISSION TEST LEAK HASE TO BE FOUND FOR CHECK ENGINE LIGHT TO GO OUT.

First step is to have the code or codes read.If the "check engine light" is on there will be a reason and should be a code or codes to be read.Once you have the codes,you can determine the correction needed to get that "check engine light" out and a valid emissions test completed.Get back to us with the codes found.

Take it to autozone or another place like it and have them read the codes and tell us what they are.

Have same problem with my 2002 Silverado. Changed purge valve. Still no luck. There is a fitting for forcing smoke into fuel system to find leaks. I checked out a friends Trailblazer (same code) Someone stole his gas cap. Bad gas cap can also cause this code. You can ignore this code. It does not have any effect on engine performance, but if you have to pass emision test must be repaired

Probably not a cheap fix.
The car will not pass the test if the light is on during the test.
The light is on when the computer has a problem that will affect emissions or performance.
You would need to have the computer scanned for trouble codes then fix the problem. Once the problem is fixed and the code is erased, the light should stay off.

Stop by any good parts store (Autozone, Advance, etc) and have them do a FREE OBII scan. It will read all your fault codes and more than likely light came on because of emission test. But have them read the faults and reset your light.

Go get your engine fixed at Jiffy...........You know they got a sale right???

Some vehicles require very specific drive cycles (called "drive traces" if you perform them on a road simulator or dyno) to activate certain self-checks like the catalyst and EVAP monitors. As a general rule, doing some stop-and-go driving around town at speeds up to about 30 mph followed by five to seven minutes of steady 55 mph highway speed driving will usually set most or all of the monitors. Consequently, if you're checking an OBD II system and discover that one or more of the monitors have not run, it may be necessary to test drive the vehicle to set the remaining monitors.

You should talk to a good emission tec, if this is not throwing a code, it is hard to say if that one of the components could be bad. O2,pump,convert, HeO2, every part of the emission system.

With a 1000 miles, and doing what is says above just before the test, and ending driving at the test
should be plenty. If it is not, you will have to have each emission part checked, or when the computer
is plugged in it might show a code that did not trip dash light.

have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.
later
paul