Hey all,
In my attempts to save this 318is I have ran into some emissions troubles. A month or so ago it failed the low speed sniffer test as follows:
High Speed
Reading Limit
HC 157 180
CO .82 1.20
CO2 13.6
O2 1.11
Low Speed
Reading Limit
HC 465 180
CO .87 1.20
CO2 12.5
O2 2.46
When I took the car for the test I beat on it pretty good trying to get the cat hot but it was having overheating issues. I've since replaced the plugs, wires, done the mess under the intake cleanup with new vacuum lines and also fixed the overheating issues with new t-stat, radiator, fan clutch etc.
The car runs well and has no idle surge but there seems to be a slight miss at idle. The car shakes a little sometime and emits an inconsistent exhaust burble when it does this. I'm afraid it won't pass the low speed again and I'm trying to figure out the next diagnosis step before wasting money on another emissions test only to fail. I can't seem to find any vacuum leaks by spraying carb cleaner around the lines. I'm not sure what to do next. Maybe the timing is off? I need to change the chain and guides soon anyway but it's pricey and I kind of wanted to make sure it passed emissions first. Any advice?
Thanks!!
In my attempts to save this 318is I have ran into some emissions troubles. A month or so ago it failed the low speed sniffer test as follows:
High Speed
Reading Limit
HC 157 180
CO .82 1.20
CO2 13.6
O2 1.11
Low Speed
Reading Limit
HC 465 180
CO .87 1.20
CO2 12.5
O2 2.46
When I took the car for the test I beat on it pretty good trying to get the cat hot but it was having overheating issues. I've since replaced the plugs, wires, done the mess under the intake cleanup with new vacuum lines and also fixed the overheating issues with new t-stat, radiator, fan clutch etc.
The car runs well and has no idle surge but there seems to be a slight miss at idle. The car shakes a little sometime and emits an inconsistent exhaust burble when it does this. I'm afraid it won't pass the low speed again and I'm trying to figure out the next diagnosis step before wasting money on another emissions test only to fail. I can't seem to find any vacuum leaks by spraying carb cleaner around the lines. I'm not sure what to do next. Maybe the timing is off? I need to change the chain and guides soon anyway but it's pricey and I kind of wanted to make sure it passed emissions first. Any advice?
Thanks!!
Comment