I live in Illinois, Just had an emissions test done and I am told that my Hydrocarbons are too high. The guy at the test station said this means that there is unburned fuel in the exhaust. Last winter I replaced all the fule injectors with 23lb/hr Accel, ported and polished the plennum, added K&N air filters, Accel 300+ ignition, Accel 8.8 mm sparkplug wires and Bosch Platnum 4 plugs. I also removed the MAF screen, add a TPI air foil and made several adjustments to the TPS. The car has 91,000 miles on it, burn no oil and in my opinion has never run better since I have owned it. Have I done something to cause this? does anyoine have any odea whay could be the cause?

 

I forgot to mention. I also added an adjustable fule pressure regulator when I was doing the other mods. I adjusted it to the the setting that I looked up at the time although I can't remember what it was.

 

93 octane before you go, let it sit a good 30 mins before you get it tested...and uh, i live in IL too, and they are pita to pass...go all alcohol if you can make it...thats what im gonad o when its my turn for emissions = )

------------------
1990 G92 5spd LB9 - 3.42 80,000 miles

Accel Ignition/Wires (8.8mm), Advanced Timing, TB Bypass, Ported and Gasket Matched Plenum, Synthetic Motor Oil, 160 Thermo, TPIS Airfoil, K&N Air Filters, Centerforce I Pressure Plate and Clutch, Edelbrock TES Headers, Dual Cats, Edelbrock RPM Series Catback, Homemade Ram Air, Bosch +4 Platinum Plugs

14.4 @ 94mph w/2.0622 60ft (w/o headers and catback)

14.426 @ 96.19mph w/2.167 60ft(w/headers and catback)

Also newly modded w/o track times:

Holley AFPR, Underdrive Pulleys, KYB Shocks and Struts, Crane Ignition

 

My friend's mustang failed on both the Hc and Co test. He ran his car to about a 1/4 tank then went to home depot and bought some denatured alchohal. He passed almost as clean as my taurus.

 

try backing the fuel pess off it might be effecting it. even though the hire fuel pressure is sappose to attamize and burn better if you raise it to far it may effect your emissions.

------------------
91 Z28 slp headers adj reg accell cap rotor coil comp cam roller
random tech cats flowmaster catback
new motor in

 

Thanks everyone. Sadly I have to take it to a state recommended garage and have them look at it so that I have proof that work was done.I then have the mechanic sign the test paper. I have a guy in town that does this and even takes the car back over for the re-test for you. I was just looking for some feedback so the garage doesn't rip me off. I think it might be the fuel pressure, it does seem a little lean when it fist starts. Thanks again, keep the feedback coming in.

 

Since when is that required? I am almost certain that you can repair the car yourself. I just tested my Vette for emissions as well (in IL) and failed for HC and CO. On the back of the Emissions paper work there is a box for (repaired by owner) or something.

I think I would pass now, but I am applying for a Waiver

Things you need to do to pass other then what is above

-turn down the FP
-let the motor get nice and HOT.. (210deg or above)
-fresh oil




------------------
-=Jeff=-
89 Corvette Coupe White with Black Grand Sport Stripe
-=ICON Motorsports=-
Check out my mods on My '89 Vette

 

Staright from the Illinois EPA website

Q. Can I do my own repairs?
A. Yes, but today's modern. fuel-injected and computer-controlled vehicles present unique challenges to the automotive repair industry. Emission failures generally require a higher degree of expertise and training to diagnose and repair, even for veteran technicians. The typical vehicle owner could experience considerable difficulty finding and repairing the problem(s) responsible for an emissions failure. It is also important to remember that repairs made for model year 1981 and later must be made by a recognized repair technician to qualify towards a waiver.

SEE you can do your own repairs

 

I read that on the report and mis understood it. Thanks for the information. It says that they rarely give waivers. How do you plan to get a waiver?

 

There is a Show Car/race car waiver.. but you need to have a certain type of insurance policy or Clause for that

 

I thought lower octane fuel produces less emissions? I thought your supposed to fill up with like 85 and back your timning down to like 0*, am I wrong?

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, LPE High Flow TPI Baseplate, Edelbrock TES 1 5/8" Headers, Catco 3" High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.32 @ 97.7mph
(corrected for elevation)

 

When I failed....in illinios....it was a result of my gutted cat. All the paperwork they give you is just B.S. to get a record of which shops do a better job of getting cars to pass. They should have explained that to you. What I did was put on a walker hi-flow and went to the phone book and found a shop, got the address, and signed a nice messy sig. on the line. Not the most honest thing to do but it worked
good luck, illinios can be a real b*tch about the testing.