M30B35 Failed Smog! :(

[Jean]

Engine temp sensor checked out.pm
Icv ok
tps ok

Afm tested bad

[ForcedFirebird]

Engine temp sensor checked out.pm
Icv ok
tps ok

Afm tested bad

Glad you found it :D

[LJ851]

Engine temp sensor checked out.pm
Icv ok
tps ok

Afm tested bad

Right on, brother.

[Jean]

Afm replaced from another running car. Driving to smog now
Part 2 lol

[smooth]

How did you determine your AFM was bad? That link from the beginning of the thread?

[ForcedFirebird]

Afm replaced from another running car. Driving to smog now
Part 2 lol

Did you test that one as well just in case?

[Kingb]

Correct me if I'm wrong, but in Cali if you swap an earlier motor into your car, the emissions have to abide by the chassis, correct?

Only if you go to a referee and have your car certified to be a swapped car. Most Smog guys dont know the difference if it looks stock and will think it is the stock motor.



They sell a bottle of stuff at auto parts stores that called somthing like guaranteed to pass. Run low octain and have the engine well warmed up. Thats what I remember when I was in Cali

[Jean]

Don't ever go to Tailpipes smog places.

[LJ851]

Don't ever go to Tailpipes smog places.

???

[Jean]

Guy told me yesterday he is open today ... I get the car ready (went to other side of town to get an afm) and hot and he is not there. But the sign says 830 to 5 on Saturday. So I drive to another tailpipes and they would not honor my paperwork from the first place.

Ive been calling the place every half hour. Now I have to wait till monday

[LJ851]

Updates?

[Jean]

Yesterday I spent 3 hours dealing with SMOG check. At least this time the guy was super cool , old school hot rod guy who had an e21 lol so we chatted for a bit.

Unfortunately new O2 sensor, a good AFM and Seafoam didn't make a lick of a difference with high NO. Smog guy told me, in his own words "beatiful numbers" but it must be running lean so check fuel pressure. He told me it's probably not the CAT as the other numbers are very good.

So, I am giving it one more shot this friday / saturday after replacing the fuel pump/filter/fpr. I really hope it passes, as the other sensors were all checked by me per bentley. ICV cleaned/checked, TPS checked, engine temp sensor checked, AFM / air intake temp checked, O2 sensor replaced, all vacuum lines checked, intake boot checked, TB cleaned. I've been using 91 octane and also tried seafoam = no difference. I've also driven the car at 4k rpm for MILES in 3rd gear to get everything hot. I've put a stock DME in weeks before as well.

So, I hope it's just down to fuel pump (car has two pumps, I think i'll bypass the inline pump for now and install a late model / TRE pump in tank), fuel filter (4 years old now), fpr (2years old). Injectors are probably fine, as they were all rebuilt/flow tested.

Thoughts/suggestions?

Giving it one more shot, then NON-OP it goes.

[LJ851]

A fresh cat is always helpful

Going to quote myself here. Aftermarket cats don't last that long and brand new ones work a lot better than used ones.

[Jean]

I totally understand that, and I've heard that before . BUT, since the NO is the only thing thats HIGH and the O2 sensor (PreCat) shows lean condition, and it seems that CAT does not reduce NO (per Snog guy)as much as the HC/CO, does it still make sense to swap the cat?

If it's the CAT, I am not swapping it. It's going to be a waste of $ / time since the cat will be useless to me after the smog test is done ;)

[LJ851]

Tell me what you mean when you say the 02 sensor shows lean condition.