Failed Inspection Again (continued) - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 08-21-2005, 04:34 PM
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This topic is a continuation of this topic:
http://www.bimmerwerkz.com/forum/ind...howtopic=40600


I'm starting a new thread because I need some serious help within th enext week or so.

There has been another turn in the plot.

I took the car to the $tealer$hip for a diagnostic yesterday morning. The emissions still fails but is MUCH MUCH lower. Here's the read-out:
emission reading limit
HC @ idle 336 220
CO @ idle 3.89 1.20
HC @ 2.5K 184 220 <----PASS!!!
CO @ 2.5K 1.94 1.20


All I've changed since the first inspection is the spark plugs, the O2 sensor and the valve cover gasket. After going to the Dealership (the guy was actully pretty helpful in explaining stuff) I now know I have a leak in my vacuum lines. I know that's not an uncommon problem but..as usual, "any advice you might have is appreciated."

Ramy
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#2 (permalink) Old 08-21-2005, 10:59 PM
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when i took my manifold off my 318 the top part it is a two piece set up there was many old brittle hoses some were cracked,try that
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#3 (permalink) Old 08-22-2005, 12:11 AM
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do you know where I can find a half-way decent DIY on taking the manifold off? The bentley manual doesn't actually do a very good job with this one. It sort of rattles off a bunch of different harnesses and shit to remove from under the manifold but doesn't have a picture to accompany what most of them look like.
I feel like I"m so damned close to passing inspection that changing these hoses out would probably do the trick.

Also, where did you pick up the new hoses? All I can seem to find is by-the-foot hose that's sort of generic.
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#4 (permalink) Old 08-22-2005, 01:23 AM
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i went to the dealership,i was desperate to finish the job,that foot hose sucks its not reinforced,when i took the manifold off i labeled everything with tape that had numbers on it, its probably harder to take off the six cylinder manifold than the four, but i really dont know whats under the six cylinder manifold i dont want you to take it off in vain, sorry
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#5 (permalink) Old 08-22-2005, 03:24 AM
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Make sure that the engine is completely warmed up when you test it, if you have to, wait in the parking lot with the revs at around 2k..

There is a tutorial on how to get your car to pass emissions (just little tricks you can do) around somewhere, il see if i can find it 2moro.

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#6 (permalink) Old 08-22-2005, 10:55 AM
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let me know about those tips and tricks for sure.
I'm certain now that the first two times, my car was not warm enough. The last time at the dealership it seems it was closer to being warm enough. I have a hunch that if i fix those vacuum lines this week and drive it long enough for the inspection, it'll actually pass. If not, there are other ways....
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#7 (permalink) Old 08-26-2005, 07:08 AM
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Is your car stock? How old are your cats? They could be gone. Have you had an oil change and how is your air filter? Maybe try one of those help pass smog additives? If your cats are out you cant really do anything but change them out or go to a $100 guaranty pass station.

-Serge
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#8 (permalink) Old 08-26-2005, 09:08 AM
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I don't know of any $100 guarentee pass stations here in Mass. I'm pretty sure that my cats are not shot. After having it checked out by a tech, he said I have a vacuum leak. My spark plugs are covered in carbon, so I assume this means I'm running rich. I'm fairly close to passing inspection....
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#9 (permalink) Old 08-26-2005, 09:28 AM
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Howdy y'all, I'm in the same boat right now with running rich. What vacuum lines would you need to inspect? I recently performed a hot soak, removing the vacuum line from the brake booster to the intake manifold. I put it back on with a fresh hose clamp, but should I be looking for anything else?

Your Lane ------>
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#10 (permalink) Old 08-26-2005, 09:39 AM
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well, the problem with a vacuum leak is that it's hard to tell where the leak is coming from. I'm going to change a good portion of the lines and the clamps and connectors and see what happens. After that, it's sort of just a guessing game from what I understand. Unless anyone has any insight.
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#11 (permalink) Old 08-26-2005, 08:10 PM
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Does your car idle and run fine? If it does its probably not a vacuum leak but a cracked intake manifold. Vacuum leak would make your car run horrible. I have a hissing type of sounds on mine and I found out that it was cracked intake manifold. It is plastic after all.

-Serge
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#12 (permalink) Old 08-27-2005, 05:01 AM
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if you had an air leak your hc's would be higher from a lean condition(1000-2000

not uncommon ),and if your

plugs have signs of carbon or exesive gas , your problem will be a failing O2

sensor , take out all spark plugs and check the condition , if all look the same

(carbon) then is global and a failure in the O2 sensor is evident ,if only some look

bad then failing spark plug wires or plugs and in very rare cases broken injector

cups,a dirty airflow

meter will make your car sluggish and lean , your best bet is get your car to a

friend that have a scanner and monitor data of the O2 sensor , if its not reading

right but working it will not throw a check engine light , but it will make the

computer think the

car is lean and compensate gas ,making it richer ,when the car doesn need it ,

if any of these turns positive , your catalitic converters will be dead and you will

need to replace them as rich condition is cats #1 enemy , most cars will pass with

new cats even if theyre not running right .



things to check.

o2 sensor

fuel presure reg diaphgram

clean air flow meter diodes (not to be confused with the iat wich is in the same a/f meter)

dispose any spark plug wires with 5k ohms or more of resistance

clear the computer via scan or grounding pin 7 in the dlc for 15 secs or disconect -batery for 1 min.

run the car 10 miles @ high rpms cats must be very very hot to pass smog quick.

&lt;a href=&quot;/forum/index.php?showuser=21196&quot;&gt;<img src='http://obd2guru.com/dio/obd2guru.gif' border='0' alt='user posted image' />&lt;/a&gt;

If everithing fails try the hammer. obd2? <a href='http://www.obd2guru.com' target='_blank'>obd2guru.com</a>
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