Fnck.

HC is high, I think the fuel tables are too rich in the ECM, working on that.

C02 is ok, but C0 is WAY high. My guess is bad catalytic converter (trashed from running too rich) & fuel tables. Anyone got any more input that seems obvious that I'm missing?

Kelly 'GhoSSt' Rosato



[This message has been edited by GhoSSt (edited March 19, 2001).]

 

First, I would pull your VIN off the board, I can do some freaky sh*t with that.

Anyhoo, your traces look balanced, I'd guess that when you address the fuel tables issue, you should have your problems mostly solved. Both your HC and CO are mostly complimentary, so I would guess it is a rich condition in general. You may have some coating of your cat, but if it is fairly new, run some cleaner in your gas and it should help.

 

What can you do with a VIN? Do you hide the VIN clearly displayed on your dash when you park your car? Just curious. I've been pretty lucky collecting about 110 VINs for my 1992 Z28 convertible registry. Can't think of anything freaky to do with them though.

------------------
Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/relocated MAT/ AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

GhoSSt,

As "W" would probably say "Dubble-ubble Fnck!"

I'll take a stab. The CO numbers are higher than ¼-mile times for a Suzuki Swift, but the CO² numbers are extremely low. My guess is that at least one of the catalytic converters is not catalytically converting anything.

Did the SEO vehicles have the electric A.I.R. pump like the '94s? If so, you might try the AIR check valves. Mine were sticking closed constantly. If they are working, you could wire the AIR pump to run constantly during the test to help the cats a bit. But with numbers that high, it's possible that no amount of extra air injection would solve the problem.

New cats might be the permanent answer. If you have the quad O² setup (not sure in '93) and if you have a scanner/diagnostic package (or know someone who does), how are the numbers at both ends of the cats? That should tell you exactly how they are performing. If you can get your catalyst bed hot enough, long enough, you might "ressurect" them - maybe.

I'd hate to see you drop the cash for new cats, only to have to change your fuel mix back for decent performance and toast them again. I've heard that copious amounts of alcohol can help lower the numbers. Around here, that means setting a fifth of Chivas on the console and asking the tester to start the car for you. It's rumored they can make the numbers as low as you need. Then again, our governor may eventually be getting a room at the State Hotel for selling drivers' licenses, so that may not be the case for long. I've heard of the oxygenating effects of alcohol keeping the CO numbers artificially low, but since I have no personal experience with emissions inspections, I couldn't say with any certainty.

I wish you luck, instead ot the dreaded "Triple-ipple Fnck!"

And forget about parking your "spare" in my garage - you might need it. Maybe next year?

------------------
Later,
Vader
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"I'm'a do Things My Way - It's My way or the Highway."
Adobe Acrobat Reader

 

Yeah, its at 86k miles, so I'd bet that the rich condition has hosed it. Only one converter/pip on a 1991 - 1993.



Nah, mechanical.



Only 1 O2, like any TBI car. But I've already ordered a new replacement.

Its all cleaned up and waiting for new carb jets and new window seals. I might lend it to you tho.

Quote:

<font face="Verdana, Arial" size="2">First, I would pull your VIN off the board, I can do some freaky sh*t with that.

Like pull the keycode from a dealer and cut a key. So what. If you can get it without the dogs eating you or me deciding to deliver some 1400fps lead poisoning, go for it.

Kelly 'GhoSSt' Rosato

 

GhoSSt,

I prefer the 107 grain pre-fragmented hot loads, too. The 230 grain "lazy" 45s are just a little too slow, but between the house and the barn, they seem adequate. the 1,500 fps loads are a little hard on the slide and barrel.

RD is probably impervious to them, though. I'm thinkin' you should rather wave a subpeona for ethics board review at him to REALLY scare him off for good.

I'm not sure what the test rules are in CO, but you might be limited on your number of attempts to pass. If you have a sniffer or scanner at your disposal, you might be able to play with the setup before attempting a second dyno run.

Possibilities are:

Introduce a vacuum leak to temporarily lean the engine without reburning a PROM. A modified free-breathing PCV valve could lean the mixture evenly, without danger of burning valves in one or two cylinders from an excessive lean condition;

Run a very hot thermostat to force hot spark retard and hot lean subroutines (unless you've programmed those out as well). The hot coolant should also help with getting the exhaust gas a little warmer, and the intake a little warmer to keep fuel better atomized;

Try running with less EGR to keep the exhaust gasses hotter. Your NOx numbers are already very low, and HCs are high, indicating you are probably running a bit cold;

Bypass the AIR diverter valve to route full air to the manifolds to try to heat the cats better. This air is usually dumped to the cat when the engine is in closed loop, but if you could get air to both the cat and the manifolds, you might burn out the cat or clean it up - it's a crap shoot;

Is the timing optimal? More advance might keep you from doing full-throttle acceleration, but could get you through the sniffer on lower octane fuel;

And speaking of fuel, lower octane might actually help you through the inspection, since there are more and lighter hyrdocarbons per given volume.

Of course, once the inspection sticker is in hand, everything is out the window. Something here has got to get you through the lanes....

------------------
Later,
Vader
------------------
"I'm'a do Things My Way - It's My way or the Highway."
Adobe Acrobat Reader

 

True, I could use Glaser Safety slugs. Great 1st shot kill ratio, over 98%.



No limits, just expensive.



I'll probably go from a 180 thermostat to a 195 for emissions purposes. Also right now I have a keyed power fan system (fans on when car is on), I'll go ahead and temp switch that. No EGR right now, the valve is there, but the passage is welded off inside the manifold. It can open and close.. But nothing happens.

Something will work, of course, Ed isn't charging me for reburns, he promised me he could do it before we started and I trust him, so it should be all good. I guessed at the major problems (fuel tables and dead CAT) I'll probably re-chip it, replace the cat, add a ton of alcohol and see how that works.

BTW, Thanks Vader & guys!

Kelly 'GhoSSt' Rosato