passing emissions

[V8SpankR]

Has anybody passed without a cat in place?
I went down to a place yesterday and they didn't look under any of the cars they were testing so I figured I'd turn the boost down to 8psi and lean my fuel settings on the AFC and go see what happens.

[hoffman]

i think Dave dropped in some 87 octane and ran fine. Dave? care to share that magic touch?

[DlandryTSI]

The only change I did was put the cat in the car and put some crappy gas in. Passed with flying colors.

--Dave

[V8SpankR]

Ok,just got back from trying to pass and it failed.:(

It passed every thing except the hydrocarbon test and it just missed that one. I guess I'll need the cat,I'll borrow my friend's this weekend and try again on Monday.

[DlandryTSI]

Umm they let you run w/o a cat??? Which place was this??

On your sheet it should tell you what a high HC count is from. I can't remember off the top of my head.

--Dave

[V8SpankR]

They never looked and I never told em.;)

The comments said the high HC readings were from unburned or partially burned fuel. Hmmm,I did turn all my fuel settings down to stock and boost was at 11psi.

[DlandryTSI]

What fuel injectors are you running? Also are you running a hacked mas? If so you need to run the car leaner.

--Dave

[V8SpankR]

I'm still on the stock injectors and my Mas just has the lower honeycomb removed so maybe I'll try leaner and with a cat.

I know it will pass then.

[Van]

Install the cat, get your fuel trims about 110-120% and you should be able to pass fine. I passed a couple of months ago.

[V8SpankR]

Can I pass on 101 octane since I still have a 1/4 tank left from Friday night?

[DlandryTSI]

No you need to use regular pump gas.

--Dave

[V8SpankR]

Originally posted by DlandryTSI
No you need to use regular pump gas.

--Dave

Why? Wouldn't 101 burn cleaner and more complete or does it burn too hot?

[DlandryTSI]

The higher the octane the slower the burn. Which means it they will fail you because your running rich. I put some 85 octane in and turned the boost all the way down. Also put your afc settings at 0 across the board.

--Dave

[Hal]

The higher octane fuels *can* result in higher than normal Hc levels... especially if you have a slight misfire.

Hal

[DSMxTSi]

I heard that a bottle of octane booster helps to pass emissions. Not sure if it's true, but it could be worth checking into. <shrug>

Cody

[Hal]

your better of with some cheap gas and some ethanol to cut it.

[V8SpankR]

I think I just need to put in a borrowed cat and pass,it passed fine two years ago with my AFC settings zeroed and on 9psi.

[canhsusername]

It took me 3 tries to pass emissions. The first time was a no brainer - no cat and failing o2 sensor with no way to lean out my fuel curve. 2nd time I put a cat in and a new o2 sensor - still failed. So I went home disconnected my FP rewire and tightened up my BOV(disconnecting the FP rewire probably would have done it :) and 3rd time I passed by alot.

[V8SpankR]

A friend of mine just gave me his stock cat and I'm gonna try again on Monday.

[Hal]

Hey guys... post your numbers.

[V8SpankR]

CO GPM - 11.12 Limit - 20.0

NOx GPM - 5.08 Limit - 6.0

Now for the killer -

HC GPM - 3.09 Limit - 2.5 :(