Hello,
I'm in the market for a used car and today I looked at a very nice '92 BMW 535. However, when the owner showed me the papers from the last safety inspection I noticed the car was very close to failing emissions. It had a HC reading of 98 PPM, with max allowed being 100 it was only
*two* PPM below the limit. I compared this to the reading a year before which was only 6 PPM. IOW, it had gotten 16 times worse between the inspections. The CO went from 0.1 to 0.3 (max allowed 0.5%) during this time also.I'm worried that if I buy this car, it's going to fail emissions next time. However, I managed to get the price down to $3300 from $4000, so I'm really tempted to buy it. The question is, what is failing and how much will it cost? High HC means the engine is running rich and has nothing to do with the cat? The problem would more likely be a non-working oxygen sensor, right?
Thanks,
Ulf