Any chance you can borrow a known good AFM from someone?

Its bizarre you cannot get higher than .3 volts on the O2 sensor with the ISV disabled and sensor disconnected.

BTW, the other bizzaro thing is your getting a lean reading form the O2 sensor with it disconnected. Normally you should get a rich condition with the O2 sensor disconnected.

could the afm be bad even though it checked out per Clarks garage? All aspects of afm checked on the dvm

Did you replace the cat already?

Like I said in my post earlier, I changed 3 things at once so can't be sure which was the culprit (I hate doing it that way, ce la vie).

The cat may have been a big contributor.

Failed again, NOx readings went up slightly this time. so did the others but the only one out of limits was NOx
NOx passing = 1323

Test 4 (today) 2385 (FQS set to -2.77 +6%)
Test 3 2241
Test 2 3086
Test 1 2991



ps. cat was done about 2 1/2 years ago

Can you be certain the timing is set right on the car? Is it possible your off by a tooth or more?

just checked and photographed them for you Jon.

http://i37.photobucket.com/albums/e5...s/IMG_1711.jpg


http://i37.photobucket.com/albums/e5...s/IMG_1713.jpg

at the risk of sounding like an idiot, where is the top picture taken? i don't recognize that part of the car. also, where was the mark on the flywheel? i am assuming you lined up the flywheel, and the marks on the cam wheel were line up (perfectly, BTW).

Ur correct Ny. Top photo is bottom of fly wheel. bottom picture was taken at the same 'time' from the cam

Should I try to reinstall my OLD O2 sensor And recheck w dvm? Does it make any sense that the AFM must b ok since it checked ok on the DVM?

Testing the AFM with the DVM only tells you if the wiper track is still good. I dont think ive ever heard of a AFM going bad and cause lean running conditions, but who knows. I would try and find a spare AFM though that is known to be good so it can be ruled out.

The only other thing i can think of is an issue with the O2 sensor.. like its not giving a correct reading. But considering its brand new, i find that to be doubtful.

i want to be sure theres something were not missing or im not cross checking.

- Intake gasket leak, if the inake manifold gaskets were leaking then i would not see the 18-19" Hg of vacuum on the engine, correct? i just changed those out in Jan of 2007.

- could an exhaust leak cause this? i dont believe there are any exhaust leaks

- im reviewing the PO records, i found a receipt from a exhaust shop indicating "installed customer's custom headers". after that, im showing a receipt from the porsche shop for rollers, front seals and exhaust gaskets "doubled up exhaust gaskets" was noted, as well.

records also show the car inspected from the PO's PO, in PA NOx readings from the state of PA, in 1999 NOx 617 (good!) but that was 10 years ago...

Many of you guys have pointed out the cat here. But I pretty much discounted it as it was replaced 9/2006 with a brand new 'universal' one that was welded into the cat delete pipe. The guy from the shop asked me my emission numbers from the state and asked all the steps ive done this far to correct it. He said the work ive done this far is about as much as i can do to get that number down. He said High NOx and O2 numbers above .3 point to a bad cat. my O2 readings this far have been .7 .7 .7 & 1.0 . I asked him how the cat could possibly be bad after 2000 miles and 2 years?! he said hes seen it happen, especially with 'universal cats'. Im going to bring the car in to them today to check it, the cat is under warranty so he said they will likely swap it for a new one

i'll post back when theres news, they are going to see the car today, and if they swap out the cat i will bring it back to the state.

If the car was running excessively rich at any time (bad O2 sensor, bad DME temp sensor) it will kill the cat very quickly. But based on your original test results i dont think that was the problem.

Maybe that story on the news is actually true..you know the one where they say people were stealing cat's off cars and punching out the platinum to sell :).

Crawl under the car and see what the cat looks like. This is what the stock cat looks like..

http://img.photobucket.com/albums/v1...4/IMG_5637.jpg

http://img.photobucket.com/albums/v1...4/IMG_5636.jpg

Most aftermarkets will look like this..

http://img.photobucket.com/albums/v1...o/IMG_5749.jpg

BTW, i have heard of brand new cats going bad after a few years. Pretty sure most were 'off' brands also. I think the best brands are CatCo, Cargraphic and Magna Flow.

jon it looks identical to the bottom picture on the left.

ps leaving now for the muffler shop

--test #5--- it failed.

BUT there was significant improvement, and changed readings (not sure why) from the 02 sensor after the test.

NOx passing = 1323

Test 5 Today - 1524 FQS reset to stock
Test 4 2385 (FQS set to -2.77 +6%)
Test 3 2241
Test 2 3086
Test 1 2991

they put a new cat on the car. the O2 readings went down to .2 (from 1.0). The other readings came WAY down too; HC went down by 100 units (50% decrease), CO went down .50 units (90% decrease), CO2 stayed almost the same.

Another significant factor was warm up time. Although the car was warmed it wasnt driven for more than 20 minutes before the test. Compound that with the folks at the facility turning the car OFF, milling around and having conversation for 5-10 min while i stood there and watched the car sit on the dyno with the motor off, before they decided to turn it on and run it. did not help.

when i got the car back to the house i jumpered the ISV, and checked the reading off the 02 sensor it was -.5. I reset it to about .5 with some minor adjustments (idle and AFM). Still note, i cannot get the 02 sensor to read above a .28/.3 with it disconnected so i just make the adjustments with it plugged in to the DME now.

i think tomorrow i will take it for a good run on the parkway and hopefully they'll get it on the dyno asap.

the guy at meineke said old cat was made by marimount, the new one by eastern? FWTW

Test 6 today 1590

Test 5 1524 FQS reset to stock
Test 4 2385 (FQS set to -2.77 +6%)
Test 3 2241
Test 2 3086
Test 1 2991

I actually took it through 3 times within an hour after making a quick adjustment to AFM to see if it would change anything. The change i made to the AFM DRASTICALLY changed the emissions read out. final numbers after 'putting it back' were right in line with the test after the new cat was installed.

could my brand new bosch 02 sensor be bad??? (part number 944-606-135-02-M14)

i wish i had a starting point on this AFM...

if someone who recently passed emissions could tell me how many turns from FULL clockwise their AFM is adjusted it may get me in the ballpark.

right now my AFM is adjusted 5 1/4 turns CCW from full CW

if i immediately unplug and test the o2 sensor , it will read right about .55 .58 but then it will just dither down to practically zero over say 3 minutes. I will set the reading to ~ .5with the sensor plugged in then test drive the car when i bring the car into the garage jumper the ISV and let it stabilize, and recheck i never get a reading where i left it off. When i return its at some crazy number in the -'s like -.4 .2

im friggin stumped.

part of me wants to keep everything just the way it is, go tomorrow morning, UNPLUG the 02 sensor and see if it passes. if it fails again, maybe i should install my old sensor and see if i can get it to be more accurate on the DVM?

For what its worth, when i readjusted the AFM on my 951 i had it set to 6.5 turns from bottomed out. It may be different on your car however. This was in an effort to lean out my #'s because i was over 9x over the limit on HC and CO #'s (running rich).

When i was trying to get my car to pass i was looking for the same info about where the screw should be set from the factory. The general consensus i got was anywhere from 6-8 turns from bottomed out. This was on both 951 and n/a AFM's.

BTW, in NYS the inspection station can issue you a sticker if more than a certain amount of $$ ($450 parts and labor in NYS) repairs were made to the car in an attempt to pass state inspection. Im not sure if NJ does the same thing. Might be worth looking into that. But i do understand you wanting to figure out what the problem is.

I should have been keeping better track of AFM turns 5 tests ago....

Thanks jon, the AFMs on our cars im assuming would be worlds apart. however, the ballpark of our adjustments seem close. Perhaps i should do additional 1 3/4 CCW and readjust the idle. That would 'set it at 7' from full CW, then retest and check the numbers.

if it fails, i'll disconnect the 02 sensor and take it right back through and see the results.

i set the AFM at "7" turns CCW and it failed again, the NOx went from 1590 to 1586, hardly any difference worth notation.

i think i will set it back to 5 1/4 and put the old 02 sensor back in and see if i can get a .6 reading on it while its disconnected.


ps. the inspection workers started to give me lip... the guy said 'aw man, this is the third time today" i said, no actually its the 4th. He said to me, "look you can only come once a day" i said, Show me where it says that in writing. Until you do, you can expect to see this car multiple times per day until i get it to pass, i do not have a dyno at my house. - and i walked walked to the waiting area. I have 19 days off this month, I will be a like a bad rash at that place until it passes.

NICE stick it to those lazy asses at the DMV in NJ. I brought my car through everything passed flying colors with emissions.. they turn on my winshield wipers on a dry windshield and split the wiperblade literally 1/2 in. and then failed me for the passenger windshield wiper.. I had to go buy another wiperblade and sit back in that damn line for another hour and a half to show them a receipt for the new wiper blade!! Please make their job inconvient on my behalf..TY

could this be fuel pressure related? i dont have the tools to check fuel pressure. I last year i replaced the FPR and the Fuel Damper.

also....I have a gallon of xylene in the garage, and i happen to have 1/2 tank of 93 fuel in the car, what if i put 1 gallon of xylene in for the emissions test?