He everybody... I have a urgent question regarding turbocharging and smog check.
I have a 1993 FD with the stock turbos. However my primary turbo (the second one that kicks in) ...I think thats the primary. Well anyways, the 2nd turbo is not kicking in. Due to either the wastegate or vacuum hoses that popped off.. everybody knows that this is a common problem....
Well my question is, What affect does this have on SMOG? I need to do a smog check at the state ref but don't know If I will pass. With only one turbo running will the car be running cleaner or not? Should I go and fix my 2nd turbo before attempting the smog check or should I just go ahead and do it with only one turbo working? Thanks guys.

 

I preface this by saying, I'm not a professional, nor have I ever had to deal with smog checks as they're not required in Nebraska.
However it is my understanding that smog checks are done at low load and low rpm levels. If you haven't adjusted the point that the secondary turbo comes online at via a PFC or other aftermarket ECU (not sure if others offer this but it's possible), then you SHOULD be fine.

 

^ what he said they're not going to floor your car on a smog check

 

I'm not entirely sure if the lack of boost is going to affect emissions anyway. I guess that would depend on the tune.

 

lack of boost will raise the richness of the a/f ratio,witch would be bad if they revved your car that high. they shouldn't so you should be good.
p.s. the fact that you called it the "second" turbo shouldn't that let you know that its the secondary turbo not the primary.

 

I wasn't sure because the ECU uses manifold boost pressure to locate a cell on the fuel map, not necessary what the boost should have been.

 

If the car is burning a lot of oil due to a bad turbo then yes it will.

 

^ might not be a bad 2ndry turbo, maybe the plumbing needs help

 

well, you can actually go to a gold shield station and request a pre-run to see if it will pass smog. being a smog tech, i dont think that the second turbo will affect smog, but i have very limited knowledge of stock twin turbo systems.
if you have a standalone system, then you might be able to run it lean enough to compensate for fuel and air, but again, idk the twin-turbo systems very well.

Lloyd

 

stand alone would fail cel

secondary arent suppose to pre-spool till 3.5k+

they arent bringing your car up to 3.5k....

if the turbo is 'bad' to the point where it would affect your smog reading - i am pretty sure you would also the visible tailpipe smoke...

which would be an instant fail anyways

just smog it

life is hard enough as it is already

quit wasting time waiting for answers on the internet

smog the damn thing

if you fail

fix your damn car and maintain it

if you dont fail

you will still have to fix your car

 

i dont think the standalone would fail cel, if the light isnt on, it isnt on. they just check to see if the light is on when the bar-97 machine asks for it.

Lloyd

 

That way you won't stress about a smog test

 

haha well thanks for all the answers you guys. wasn't expecting to get so many.
(rx7/24/7) I wasnt sure if the second turbo that kicks in is called the primary or secondary because I could have sworn that I saw a diagram before where it showed that the primary turbo is the second one that turns on.....
But anyways, thanks you guys. ANd yeah, im sure they wont be revving the car up to the point where the 2nd turbo kicks in anyways so it won't matter either way... I didnt think about that for some reason. And yes, I will go to another smog place and do a pre-smog to see if I will pass. And the turbo isnt blown.. it's not burning oil or anything. It's just not spooling due to the problems that all stock sequential systems have....

 

Key On - Car Off - check engine light will light if it is working

it wont on a stand alone....

that means...

tempered light... or...... different ecu... or even burnt out light bulb

but it is a technical fail...

you will be suprised at the smog guys these days that would care for chicken **** like that... smog guys are the new mechanic... hell scratch that - everyone is a mechanic!

 

odd, because procedure tells us not to turn the car off or anything, just peek in the car to see if the light is on at the time that the machine prompts.......
some people cant follow protocol

Lloyd

 

how are you going to know if the check engine light *works* in the first place if you never put it in the 'self dignosis' mode?

that is like - visually looking at the egr vs hooking up a vac pump to see if the egr works...

i know the ***** that smog my car does both ><