[Diy_efi] Smog pump and emissions testing question...

[Eck, Joel (Houston)]

When I had my honda tested here in TX, they pulled that early shifting =
crap, too. And mine failed (partly) due to that, too. Almost seems like =
they drive it that way on purpose, just to see how dirty it will run in =
the worst possible situation.

personally, I think they ought to let _you_ drive the car during the =
emissions test, and have _you_ drive the way _you_ normally drive it , =
that would reveal how your car runs and emits when _you_ drive it. most =
people aren't shifting into 4th gear at 27 mph... yes, that's how early =
the guy shifted when he tested my car. He stalled it a couple of times, =
too.

-----Original Message-----
From: Brian Renegar [mailto:thomas.renegar at nist.gov]
Sent: Monday, April 28, 2003 4:34 PM
To: List for general do-it-yourself EFI talk
Subject: Re: [Diy_efi] Smog pump and emissions testing question...


Ok, I see what you are saying about the air injection holes being=20
clogged.  But I have Edelbrock heads, which do have the thermactor =
holes,=20
and have been off of the motor several times, including hot tanked.  So =
I=20
would think that the holes should be clear in my case.  The only visual=20
inspection they do is for the cats.  They do not open the hood, so I =
don't=20
have to worry about "why is that hose running there instead of here" =
kind=20
of questions.  BTW, I'm probably going to be using my factory H-pipe for =

the emissions test.  Would it still be better to route the smog pump to =
the=20
cats, or instead run it up to the cylinder heads?

Also, the test is not "steady state", as you say.  They DO vary the =
load,=20
mph, as in a normal driving situation.  Everything from idle, low speed=20
cruise, mild to moderate acceleration (as in freeway entrance ramps), to =

highway speed cruise is tested.  I have taken my Jeep through the test, =
and=20
you can watch the various stages it goes through.  We went through=20
everything, all the ways up to 55 mph.  What I'm worried about is the=20
people not knowing how to drive on the dyno.  As I said, a friend took =
his=20
through emissions and failed.  Most of that was due to the emissions =
tech=20
not knowing when to shift the car.  As an acceleration period came up, =
he=20
would up shift to the next gear, and then have to floor the gas to keep =
the=20
wheel speed in the increasing limits.  Obviously at that point emissions =

were out the window, and he tried to explain that to them, but they=20
wouldn't listen.  If I tune the car to just run at 14.7:1 for all=20
conditions and that situation comes up, I could have a blown up=20
engine!  I'm almost tempted to put a throttle stop in place to keep them =

from giving it too much gas so that doesn't happen!

Brian


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