Smog Tech Help

[eerrrrr]

**91 w/ 98 ka24de (<--supposedly) auto to 5spd. mods: walbro 255 pump, other than that its bone STOCK. got springs and welded diff but i dont think that matters for smog.

(12-22-08):

so i went in and got some numbers. wasnt the actual test, but the dude was nice because he bascially gave me a free test. passed the 2500 rpm part, but failed the idle part again. heres the numbers:

HCC PPM: 385
CO%: 1.09
%CO2: 12.8
%O2: 2.0

he said it was O2 sensor, got that (need to install). but should i get a cat too?


(12-19-08):

well shit sucks. i got my fuel evap leak fixed (it was the o-ring for the fuel pump). went and tested it, and failed the emissions part. when i went the first time i passed all the emissions but failed the FUEL EVAP TEST. after i got the FUEL EVAP TEST to pass, i failed the emissions part. here is my numbers (before and after). what can i do to pass smog?

91 stock ka24de with 255 pump as only mods. took off intake/exhaust for stock, stock 20* btdc timing, just did half tune up (no spark plug wires), 175,180,180,175 compression test, loud valve tick...but i passed emissions part like this when i first tested. didnt do anything to the car (add/remove parts) that can affect emissions. dude said my o2 was out.

http://i58.photobucket.com/albums/g254/eerrrrr/untitled-4.jpg

[racepar1]

Was the car fully up to temp for the first run? It simply does not make sense for the car to run THAT much cleaner on the second one. Before you get it smogged make sure the car is HOT or you will get erratic readings like that. I am a mechanic and have seen that scenario a MILLION times. The smog techs are just too lazy or incompetent to get the car hot.

[eerrrrr]

yeah fucken i told the dude to go drive my car hella hardcore for the RETEST. i had to drop off the car before i worked since i work the whole day (7:30am-6pm). i work across the street from them. he prolly did the test around 3ish in the afternoon. i have a feeling he just let it idle to its normal operating temp. cuz for the first test i drove that shit everywhere (across town like 4 times looking for a got damn smog place that would smog me) before i tested it and it seemed to me that it helped me pass.

also it failed the 2nd run at idle.

[racepar1]

For CA smog there should be a 15mph run and a 25mph run. Did it pass the 25mph run? Also there is no way to fail the test at idle because there is no test at idle. Sounds like this guy is a moron!

[eerrrrr]

i think it depends on the area. my area tests emissions at idle and at ~2500 rpm. ive only been tested for emissions like this (have smoged 3 different cars at 4-5 different places). it passed the ~2500 rpm part, but not the idling part (or ~900 rpm)

[racepar1]

As far as I know the smog testing laws are a statewide thing. But anyways just make sure it is fully HOT before the next test and it will most likely pass. If it doesn't PM me and I will see if I can figure it out.

[eerrrrr]

well i dont really want to go test it out because i still have a chance of it failing. and if the place i go to doesnt have a free retest, ill have to pay again. i dont want to pay 2 times, because i already have previously.

[racepar1]

No matter what you do you still have a chance of it failing as it is at the minimum a 14 year old car. If you have to pay again anyways just find a test-only place that does free re-tests, that way if it still fails your covered.

[eerrrrr]

yeah since i was considered a GROSS POLLUTER, i have to go to these 2 places to get it smogged. if not, refs would be the only way..as what the smog tech said. that foo also said that the o2 might be going out, and if it did, hopefully it didnt mess up the cat. would a faulty o2 cause these numbers? (look at RETEST: 922 rpm row for #'s)

[racepar1]

Yes a faulty o2 could cause the car to run rich or lean, but it should be consistently rich or lean. Also it SERIOUSLY was running rich in the first run, like the ecu was still in open loop rich.

[zugoi]

How is he smogging ur car without the dyno. Hes just doing an idle smog check where he leaves ur car at 2500? I thought you can only do that on big trucks that wont fit onto the dyno. You may just want to bring it to a different shop. Plus if your o2 sensor was going out the smog machine will tell you.

[fakts13]

smog shops that didn't have dyno's to begin with don't have to get one.

unless the car is obd2, o2 sensor code won't be seen, as the car's obd system does not have to be hooked up to the test computer, and in my experience, unless the o2 sensor is completely gone, the ecu won't throw a CEL or code for the o2.

eerrrr: just try going to a station when you have the time to drive the car yourself hard before the test. that way you can be sure the cat is nice and hot. kind of odd that at the 2500 rpm test had less hc and co than the first time. maybe the motor didn't really warm up till after the idle test?

[brndck]

for the record. not all areas of california require the asm (acceleration simulation mode) test, aka dyno test. Almost all of socal does, but many other counties (i used to live in san luis obispo county and they were sniffer only) do not require dyno/loaded testing.

[eerrrrr]

well i guess ima just go and retake it after driving hella hardcore for a couple mins around town. but first ima call the place i have to go to see if they do free retests.

[ma71supraturbo]

Go to A&T smog off North Esplanade. Before I could go outside and ask the smog tech to rev my car & warm the cat (in my '85 supra -- which has always been hit/miss with smog), he already had a rod braced against the accelerator and let it rev at 3000rpm for like 5 minutes. He was like "I'm just making sure your cat is nice and warm." The car passed with flying colors :)

[eerrrrr]

i wish i can go there. im restricted to 2 places. PARK AVE TIRES AND AUTOMOTIVE or PAYLESS 4 WHEEL DRIVE....or the ref at butte college.

[ma71supraturbo]

park ave is pretty picky, so good luck there. I didn't know the ref was so close -- good to know if I ever do a swap :)

[eerrrrr]

ok updated...........edit first post with updated #'s.

[eerrrrr]

Help Me Out Smog Ppl!!!!!!

[fakts13]

i'll call one of my buddies this week, he's a smog tech so he might know how to reduce hc's

[240trooper]

is it sohc or dohc, i failed 3 times with my 2nd to last car , it was rated at 3,000 GP , after replacing the o2 ,pcv,fuel filter,spark plugs and a new cat i had the EGR flushed out ,watched the guy test my car pass with flying colors , it amazed me it rated at 118 , basicly the only thing i didnt do my self was the cat and the egr flush besides that its all eazy, ohh yea i changed the thermostat too and had an oil change. I live in cali so i know how it is, but my car was a 5speed sohc with 193,000 miles with a full catbat ,still passed

[eerrrrr]

ok after reading many threads about stock motor with walbro 255 pump, ive come to a conclusion that maybe that its causing me to run rich at idle. sounds right??? one post it said that it increases pressure by ~3% so ill be running 35.02 psi? ( [34*0.03]+43 = 35.02 ). if this is so, maybe the broken o-ring was holding back pressure making me run at stock fuel pressure? and now that the o-ring is fixed, the pressure is raised again?