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Old 02-17-2012, 02:23 PM   #1
nab24-
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Angry Car not passing Etest?

Hey guys my car wont pass etest. on and off Dyno.
it had better results on the dyno the first time but now i have it in a third time for another Dyno attempt, this time with new spark plugs and clean the air filter as best i could (has some crappy aftermarket one on) but before any etest attempts the oil was changed at BMW and they checked the computer and the only issue was the thermostat, no other codes came up so the O2 sensors are fine.

any suggestions??

It passed everything except the 2700 RPM CO%. it was only allowed 0.32 but let out 0.52.


If it fails again ill be looking to get a fake test so i can just get this car on the road.

its a 328is btw
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Old 02-17-2012, 05:24 PM   #2
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yup it failed again....
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Old 02-17-2012, 05:48 PM   #3
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There's no such thing as a 2000 328is. If it's an E46 then you either have a 328ci or 328i. Only E36's came in 328is. Not sure if this is possible, but if you are telling them its an 'is' then you would get tested as if its an E36 328is instead of an E46 rendering different results?? Unless they pull by VIN then the info should be correct...
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Old 02-17-2012, 08:56 PM   #4
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They should go by VIN...and year/model.

What kind of gas do you use? Regular oil changes? Was the car nice and warm when tested? (few hard pulls on the highway does it).

Sometimes the o2's don't show codes, but will fail the Etest. Next thing to look at is cats.
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Old 02-17-2012, 09:55 PM   #5
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catalytic converter is shot.
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Old 02-17-2012, 10:14 PM   #6
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Oh my insurance said it was a 328is going by the VIN. but you are probably right.

Thanks guys,

I do believe it is the Cat Converter aswell, but after the first Etest fail I filled it up with V-power fuel and put a bottle of injector cleaner in and i didnt run it very hard before the next attempt at a Etest so my dad was saying the second etest might have been worse because the injectors are still being cleaned off so all the excess carbon was coming off still during the second attempt which made my CO% and everything else fail even worse, then on the third attempt it got a little better but still worse then the first attempt.... ill run it really hard a few times and blow through the tank of fuel then refull before it goes in for its diagnostic test on monday/tuesday.

would that make sense to anyone ^^^??
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Old 02-17-2012, 11:28 PM   #7
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Yes, NOT a good idea to do the test when any kind of cleaner is in the gas!
Just finish it, and put some fresh gas. Also drive the s#it out of it, will clear things out. But still no chance without cats.
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Old 02-17-2012, 11:35 PM   #8
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my dad has an older vehicle that would normally fail an etest.. what he does before heading over, is drive on the highway for 30mins. passes with flying colors, only when doing this.
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Old 02-18-2012, 11:12 AM   #9
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Seeing that it is just CO that is high, it would indicate a rich mixture. You need to monitor the O2 sensor readings has the car may be in open loop.

The first place you should look at is the thermostat. If it is staying open the vehicle will fail to reach operating temperature which will keep the car in open loop for an extended period such has mid throttle cruising. This period will allow cooling af the catalysts and a possible fail on CO.

If both HC and CO were high then I would lean towards a failing catalyst.

Seeing that you had an issue with the thermostat it may be wise to replace this first ensuring a correct coolant mixture and then run the e test.

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Old 02-18-2012, 12:23 PM   #10
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It's possible the car is running rich because of the thermostat - car wants to warm up thinking it'd cold.

Replace thermostat, run it hard before doing test again.
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Old 02-22-2012, 07:49 PM   #11
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You could also put some Methyl Hydrate in the gas. I've used it in the past to get cars by that otherwise won't.... Like my wife's old Focus.
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Old 02-22-2012, 10:17 PM   #12
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You could also put some Methyl Hydrate in the gas. I've used it in the past to get cars by that otherwise won't.... Like my wife's old Focus.

works here in Peterborough too. My dads 91 Jeep cherokee has 380k and still passed this Nov. but had to put methyl hydrate in to get it there. helps the engine burn super hot.
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Old 02-22-2012, 11:07 PM   #13
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works here in Peterborough too. My dads 91 Jeep cherokee has 380k and still passed this Nov. but had to put methyl hydrate in to get it there. helps the engine burn super hot.
I get it from Winslow's, LOL
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Old 02-23-2012, 07:08 PM   #14
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Didn't read though it all.. but CO is not a cat. What type of spark plugs did you put in the car? I have seen bmw fail CO because the wrong ones were used.
How were your other readings? HC and Nox?
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Old 02-24-2012, 06:00 PM   #15
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It had NGK plugs in it and i replaced it with the same ones (not knowing what was already in it) still getting the fuel with the injector cleaner out of the car then gonna refuel and try again.

right now im working on replacing the alt pulley/whatever pulley is whistling like crazy before it causes any more issues.
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