Emissions rejection

[sholxgt]

If you turn them on you may or may not get cat efficiency dtc's

That's a good point.  Not a guarantee with any aftermarket cats.  Guess, for that matter, it's not a guarantee with stock ones either.  At least those are Ford's problems during the emissions warranty period.

I don't even have emissions testing where I live.  I'm more concerned about warranty at the dealership.  The Magnuson Moss act at least protects you if the aftermarket part is deemed a replacement.  A 50 states cat goes a long way towards showing that it's an aftermarket replacement.  Still no guarantee there either though.

 

[ajpturbo]

50 state legal doesnt have anything to do with cel...it has to do with the carb certification....every oem has a different strategy for measuring cat efficiency

 

[sholxgt]

50 state legal doesnt have anything to do with cel...it has to do with the carb certification....every oem has a different strategy for measuring cat efficiency

Agreed.  My point was that, to be 50 states legal, they have to meet certain standards.  This in turn means they are more likely to meet the needs of the factory cat efficiency tolerances.

I have used race cats on other cars and they do clean up the exhaust some, but they fall way, way short of factory cats.

 

[ajpturbo]

A catted pipe that still throws a cel is flat out retarded and should be yanked from the shelf

The ecu injects fuel into the engine at times of test...the amount of fuel required for the rear 02's to see a change is measured...the more fuel it takes then the more efficient the cats are and will help the monitors ready

If it only takes a small amount of fuel to show a change in air fuel ratio then the cats are shot and not efficient...thats why you get cat efficiency codes with test pipes and high flow cats

Its called the integrated air fuel method for testing cat efficiency....its in the obd theory in the ford epa manual

 

[sholxgt]

A catted pipe that still throws a cel is flat out retarded and should be yanked from the shelf

The ecu injects fuel into the engine at times of test...the amount of fuel required for the rear 02's to see a change is measured...the more fuel it takes then the more efficient the cats are and will help the monitors ready

If it only takes a small amount of fuel to show a change in air fuel ratio then the cats are shot and not efficient...thats why you get cat efficiency codes with test pipes and high flow cats

Its called the integrated air fuel method for testing cat efficiency....its in the obd theory in the ford epa manual

Thanks for this!  I did not know that the ecu deliberately injects fuel to run tests on the cats.  I thought it was just a measurement taken during normal operation.

Is there a downpipe available for our cars besides the PPE that doesn't violate your top statement?  Curious because I'm in the shopping stages.

 

[ZSHO]

Here's the OBD manual,it will give you some insight on catalyst efficiency and I/M readiness.  Z        http://www.fordservicecontent.com/ford_content/catalog/motorcraft/OBDSM1505.pdf

 

[SHOdded]

Flow & efficiency are not necessarily lock-stepped.  There is the little question of design & materials, sometimes simply the level of quality control.

 

[Blackhawk]

Crazy, I never would have thought they would throw CEL with the catted DPs.  Basically rules me out from buying DPs in Nazi Illinois.  How does BPD pass, maybe he is south enough to not need to do emissions checks.

 

[FoMoCoSHO]

A catted pipe that still throws a cel is flat out retarded and should be yanked from the shelf

The ecu injects fuel into the engine at times of test...the amount of fuel required for the rear 02's to see a change is measured...the more fuel it takes then the more efficient the cats are and will help the monitors ready

If it only takes a small amount of fuel to show a change in air fuel ratio then the cats are shot and not efficient...thats why you get cat efficiency codes with test pipes and high flow cats

Its called the integrated air fuel method for testing cat efficiency....its in the obd theory in the ford epa manual

Thanks for this!  I did not know that the ecu deliberately injects fuel to run tests on the cats.  I thought it was just a measurement taken during normal operation.

Is there a downpipe available for our cars besides the PPE that doesn't violate your top statement?  Curious because I'm in the shopping stages.

If you are monitoring you can actually see it running the test when cruising, lambda will swing from rich to lean for about 10 seconds then it returns to stoich.

 

[BiGMaC]

Crazy, I never would have thought they would throw CEL with the catted DPs.  Basically rules me out from buying DPs in Nazi Illinois.  How does BPD pass, maybe he is south enough to not need to do emissions checks.

You can do the catted PPE DPs no CELs and no codes will be set .. I have tested them and no codes set in over 2 years stock or with LMS tune.  You'll enjoy a stronger pull at lower rpms with them... Fun!

 

[Blackhawk]

Are you are positive LMS didn't turn the rear O2s off?

Crazy, I never would have thought they would throw CEL with the catted DPs.  Basically rules me out from buying DPs in Nazi Illinois.  How does BPD pass, maybe he is south enough to not need to do emissions checks.

You can do the catted PPE DPs no CELs and no codes will be set .. I have tested them and no codes set in over 2 years stock or with LMS tune.  You'll enjoy a stronger pull at lower rpms with them... Fun!

 

[ajpturbo]

Crazy, I never would have thought they would throw CEL with the catted DPs.  Basically rules me out from buying DPs in Nazi Illinois.  How does BPD pass, maybe he is south enough to not need to do emissions checks.

You can do the catted PPE DPs no CELs and no codes will be set .. I have tested them and no codes set in over 2 years stock or with LMS tune.  You'll enjoy a stronger pull at lower rpms with them... Fun!

No codes but are the I/M monitors ready and set?

 

[BiGMaC]

Crazy, I never would have thought they would throw CEL with the catted DPs.  Basically rules me out from buying DPs in Nazi Illinois.  How does BPD pass, maybe he is south enough to not need to do emissions checks.

You can do the catted PPE DPs no CELs and no codes will be set .. I have tested them and no codes set in over 2 years stock or with LMS tune.  You'll enjoy a stronger pull at lower rpms with them... Fun!

No codes but are the I/M monitors ready and set?

Yes... With switch back to 2BAR MAP and stock tune... After you complete the prescribed driving cycle which may take a couple of days.

 

[ajpturbo]

Crazy, I never would have thought they would throw CEL with the catted DPs.  Basically rules me out from buying DPs in Nazi Illinois.  How does BPD pass, maybe he is south enough to not need to do emissions checks.

You can do the catted PPE DPs no CELs and no codes will be set .. I have tested them and no codes set in over 2 years stock or with LMS tune.  You'll enjoy a stronger pull at lower rpms with them... Fun!

No codes but are the I/M monitors ready and set?

Yes... With switch back to 2BAR MAP and stock tune... After you complete the prescribed driving cycle which may take a couple of days.

Have you tried with the tune?.....It really shouldn't matter. I can't think of a reason the tune would affect it...I know well the items in the tune that affect the I/M monitors

 

[BiGMaC]

Crazy, I never would have thought they would throw CEL with the catted DPs.  Basically rules me out from buying DPs in Nazi Illinois.  How does BPD pass, maybe he is south enough to not need to do emissions checks.

You can do the catted PPE DPs no CELs and no codes will be set .. I have tested them and no codes set in over 2 years stock or with LMS tune.  You'll enjoy a stronger pull at lower rpms with them... Fun!

No codes but are the I/M monitors ready and set?

Yes... With switch back to 2BAR MAP and stock tune... After you complete the prescribed driving cycle which may take a couple of days.

Have you tried with the tune?.....It really shouldn't matter. I can't think of a reason the tune would affect it...I know well the items in the tune that affect the I/M monitors

Haven't tried with the tune... Maybe next time I will... Just posting what I'm sure will work. Maybe someone else plagued by life in an emissions testing area will chime in.

 

[ajpturbo]

BigMac if you set the monitors with the stock tune then I suspect you should pass with the tune as well...I doubt anything in the tune that has to do with the I/M monitors has been touched

 

[BiGMaC]

Worth a try for sure.

 

[ZSHO]

It looks like a total of 25 States have made the transition to OBD 2 Testing and here's a good article of what to expect and this Fall will be my 3rd vehicle inspection and never had any issues with emissions testing while in stock tune and based on my signature. Z      http://www.aa1car.com/library/us50326.htm

 

[ajpturbo]

Z why are you switching to stock for inspection?

 

[ZSHO]

Z why are you switching to stock for inspection?

I simply like to comply with rules and regulations,lol and most Tuners as you are aware of immobilize the rear 02 sensors,need all the 02 sensors to be active in order to suffice I/M readiness if required by your State.  Z