325i running very rich

Post Sun Mar 27, 2005 8:44 pm

Hi guys,

Went for an MOT and the guy pulled the probe out the exhaust with the reading heading towards 1800 ppm! This is bad aparently.

I have got a 285 cam and a chip from chipeduk. Passed the last MOT ok with both mods.

Just need a checklist of what to look for really. I was thinking maybe temp sensor but dont know how to test it. All the intake side is good, no leaks etc.

help me

P.S. I managed to loose my login details for my n3il_325i account and I no longer use the email address I signed up with. Who do I need to talk to?

Thx.

Post Sun Mar 27, 2005 8:47 pm

dirty airfilter could cause that dude.

check that first, what was the CO% ??

Post Sun Mar 27, 2005 8:55 pm

Got a new air cleaner in there.

The HC's were at 1800ppm and rising. I should know this but is that the CO reading or not? in which case I dont know.

Bascially your eyes smart if you stand near the rear of the car.

Post Sun Mar 27, 2005 11:33 pm

Only resistance values for the blue temp sensor I've got in my folder, are: 2.93k ohms at 16 degree C, and 860 ohms in hot water, (probably about 60-65 degree C straight from hot tap).
To give your symptoms the resistance would remain high when hot.

Post Tue Mar 29, 2005 7:52 pm

Thanks for that data dude, checked this evening and it is working corrently.

I am really at a loss on this one. Checked over all the sensors and connectors.

Thing is it starts and runs fine under all conditions its just running rich as hell. It really makes your eyes water if you are round the back.
Maybe more extream suggestions as to what might cause this. Just to add, it has probably been like this for a while just haven't noticed :/

Thx guys.

Post Wed Mar 30, 2005 11:52 am

What colour are the spark plugs? have you tried changing them aswell???

Check all 6 to see if they look 'even' in colour.

Post Wed Mar 30, 2005 3:17 pm

HC stands for Hydrocarbons (particles of unburnt fuel) in ppm (parts per million), CO is obviously Carbon Monoxide and is expressed as a percentage (%).

Did you get a print out from the MOT place? Can you let us know CO concentration (%) and the Lambda ratio reading would help too, we can make a more informed diagnosis with the whole picture!

Post Wed Apr 06, 2005 5:21 pm

Hi,

Sorry, I havent checked the forum in a while.

I will see what info I can dig out. Also list the things I have checked.

Thanks
Neil

Post Wed Apr 06, 2005 6:00 pm

I would go with Ant on the CO2 needs adjusting,my Tourer would poison me when I used to back it into the garage,really would make your eyes water too.
Cost me a fiver to get it adjusted,job done,no more nasties!

Post Wed Apr 06, 2005 8:04 pm

A lot of people to smooth the idle in the motronic cars mess about with the idle screw!

If you car is running rich, you must get it setup by a decent bosch autoelectrician, it worth as it can save time and money in the long run!

Post Wed Apr 06, 2005 11:26 pm

amit325i wrote:A lot of people to smooth the idle in the motronic cars mess about with the idle screw!

If you car is running rich, you must get it setup by a decent bosch autoelectrician, it worth as it can save time and money in the long run!

This is what someone had done to mine previously,not really an idle screw so to speak,you can't possibly do it right without the proper equipment.