[Supras] NJ inspection

Tue Apr 15 20:30:12 CDT 2008

Hi Bernie,
I would assume the EGR should be open during a 15 MPH cruise test.  IIRC, the EGR is open in part throttle cruising condition and closes at idle or WOT.

-Craig

---- "berniek at technicaldevelop.com" <berniek at technicaldevelop.com> wrote: 
> Dear Craig and Group:
> 
> 
>     Yeah, I can understand the implications of a plugged connection.  I 
> do have a couple of new accordion hoses, but will try the gas station 
> first with present mods assuming I still have a guy I know with a 
> Pantera who has his inspected there.  It's a year away, but I tend to be 
> a worrier.  If I do need to go to the state, the exhaust concerns me 
> more because the Random Tech cat is so small, and the rest of the system 
> is 3". 
> 
> 
>     I got the '91 from Houston and had it inspected the next day.  It 
> passed but just barely on NOx.  At 100K miles, I was going to just lap 
> the block, do the head and install a Cometic gasket, but found that #1 
> piston did not come up to the deck, so it must have had a BHG (also 
> evident from buggered bolts) and hydrolock before.  So in went a 
> refreshed JDM and all the other mods which I wound up with.  At this 
> point I do not know if the high NOx was because of cat poisoning from 
> glycol, or if the EGR system is not functional (still have the original 
> front exhaust assembly in storage).  Both the power and boost were way 
> down as compared wtih my '90, so the cats must be partially plugged.  If 
> I absolutely need to, I could gut the precat, install a new main cat and 
> temporarily reinstall the stock front exhaust section. 
> 
> 
>     I guess one thing I don't understand is that the ECU controls a 
> solenoid valve which "digitally" applies manifold vacuum to the "vacuum 
> modulator" for the EGR valve diaphragm.  I have half a mind to connect 
> the diaphragm to the charcoal purge port in the throttle body for 
> inspection, the way it is done on most other cars (through a thermal 
> vacuum switch).  From other cars, I can pretty much tell when just 
> enough EGR is used, so would bleed off vacuum from the port connection 
> to set it right as a guess for the 15 MPH dyno test.  Alternatively, 
> I'll scrutize the TSRM and/or will install a vacuum gauge in the car to 
> see if/when the EGR diaphragm gets vacuum. 
> 
> 
>     As always, any hints would be appreciated.  Thanks.
> 
> 
>     BernieK
> 
> 
> 
> cthommes at adelphia.net wrote:
> > Black paint is your friend.  :)
> >
> > But-- I know that anything capped or plugged is generally a huge red flag on this coast... I'd suggest even an unmodified accordian if your mod is that apparent.  They aren't expensive even new (just don't fall for the $90 used ebay ones), and you can keep it for next time too.
> >
> > -Craig
> >
> > ---- berniek at technicaldevelop.com wrote: 
> >   
> >> Dear Craig and everyone else who wrote back:
> >>
> >> I'll get the engine compartment as stock looking as possible, but will
> >> still have a piece of curved 2-1/4" curved pipe coming through the fender,
> >> which I can paint black.  I'll take off the Raptor, but I have a 1-1/4"
> >> copper ell (1-1/2" OD for Raptor recirculation) with one end permanently
> >> installed in the AFM end of the accordion hose.  I guess I can plug the
> >> end, paint it black, and hope that no one complains.  I'm also hoping the
> >> convex mirrors the inspection police use to look under the car do not
> >> recognize the 3" exhaust.  The Random Tech cat is small too, about half
> >> the width of the stocker.
> >>
> >> Before I sold my '90T, the inspection police tried to get the HKS LET-T16
> >> exhaust to sound loud, which seemed to be touch and go for a moment
> >> because of the boominess inside of a steel building (with bay doors open).
> >>  They are supposed to use decibel meters but do not.  I have the same
> >> exhaust now on the '91 with the mods described in other postings.  Also,
> >> I'll paint the top tank of the IC black.  But in all the years I've taken
> >> cars to NJ State inspection I've never had a hood opened, and had never
> >> seen one opened.
> >>
> >> Thanks.
> >>
> >> BernieK
> >>
> >>
> >>
> >>     
> >>> Hi Bernie,
> >>> I don't know about New Jersey, but in CA smog inspectors have never once
> >>> balked about the precat being missing.  This is over 12 years of smog
> >>> inspections between my turbo sups and the old CA spec n/a sup.  (To those
> >>> who want to discredit this point: please look into the differences in the
> >>> CA spec n/a cars before you try to tell me n/a sups didn't have a precat).
> >>>
> >>> Never had anyone balk at the stock airbox replaced with a FIPK either.
> >>> Even without the CARB EO sticker on the FIPK...
> >>>
> >>> Nowadays when I smog, I replace the upper hard pipe, 3K pipe and BOV with
> >>> stock items and the engine bay looks completely stock.  It's a 10 minute
> >>> job to save hours of headache.
> >>>
> >>> -Craig
> >>>
> >>> ---- "berniek at technicaldevelop.com" <berniek at technicaldevelop.com> wrote:
> >>>       
> >>>> Although next inspection time is some time in the future, I'm curious
> >>>> about experiences anyone has had with NJ inspection at a state
> >>>> facility.  I's rather go to a small private place and pay $100-$150 just
> >>>> to get the damn sticker, if anyone knows of one.
> >>>>
> >>>>
> >>>> If I'm forced into going to the state, I'll take off the Raptor BOV
> >>>> temporarily, but will leave the hard piping stating that the plastic
> >>>> went to polymer heaven.  Aside from the polished aluminum intercooler
> >>>> and hardpipes, the engine bay will look stock (well, maybe I'll put back
> >>>> the plastic piece feeding the 3000 pipe hose).
> >>>>
> >>>>
> >>>> I guess the biggest concern is the single cat, part of a Random Tech 3"
> >>>> downpipe assembly.  There is no precat, but I don't know if the
> >>>> inspectors with their convex mirrors know enough to look for it, since
> >>>> the Supra is old and not too many of them exist now.  Just wondering if
> >>>> I should reinstall the stock airbox.
> >>>>
> >>>>
> >>>> Any and all opinions would be appreciated.  Thanks.
> >>>>
> >>>>
> >>>> BernieK
> >>>>
> >>>> _______________________________________________
> >>>> Supras mailing list
> >>>> Supras at supras.com
> >>>> http://supras.com/mailman/listinfo/supras_supras.com
> >>>>         
> >>>       
> >>     
> >
> >
> >
> >   