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|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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a bit black. I will start from checking the air filter and the AFM(air flow meter. Best way to clean an AFM is with a can of brake cleaner or carb cleaner.
then... if u haven't changed your 02 sensor yet, maybe it's time you did. 02 sensors are responsible for sensing the amount of air in exhaust and send the signals to the injection brain in order that ur engine can achieve a 14:7 gas-air ratio. Specs say they should be changed every 60,000 miles.
wrong plugs that are too cold a range can be another cause or rich exhaust-stick to factory specs. Aftermarket +4 & +2 platinums are nt compatible with european cars for some reason, even if Bosch makes 'em.
-whether ur car is OBD1 or OBD2, find someone to do a scan for u. it's cheaper to spend $20 on a scan than probing here and there in blind fashion.
-after all the above has been done, and u still have rich exhaust, start suspecting a defective AFM, or stuck in open injector/s.
ticking noise especially when amplified at the exhaust has got to be valves. If ur's is the kind that have the tappets, then you need to have the clearances set to factory specs.(i dnt know your yr & model, so i cnt give you the specs...)
If however, yours is the model that uses hydraulic lifters, then chances are it is a stuck lifter that causes the ticking. In some cases, u can correct this by adding some detergent oil additive to ur oil and driving it about 200miles(cumulatively of course).. the detergent in the oil will clean out the hydraulics.
OK.. ur car uses hydraulic valve tappets.
Detergent oil additive. u can try "MARVEL MYSTERY OIL" or "CD2" . there are other brands but these are my faves. the insides of my engine/s always look like new after treatment ;-)
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