I’m resurrecting this thread because once again I have to renew my emissions and the car is failing. User “pipes” solved his emissions by adding a 2nd cat. I had OBD2 cats, then went to 2 high flow magna flow cats (1 for each bank). Although I’m sure adding more cats will help the results, I can’t imagine the cats are the culprit as it failed on both setups, even with the stock OBD2 cats. SO I’m still hunting for a solution here.
Last time I passed emissions I ran it through with 1 injector unplugged. Kind of a ghetto trick, but it worked (barely)! I am considering trying this agian. The time before last, I took it to a local shop and they couldn’t come up with an issue with my car and blamed tuning (TRM). They said they passed me by running a 325i (m50) chipped DME. The theory here is that the tuning is detuned for the smaller motor. I snagged a m50 chipped DME and plugged it in today and it seems to smell “richer” at idle than it did before.
So does anyone agree with this theory or think that running my modded obd1 s52 chipped with an m50 chip will “detune” it and get it to pass emissions? Did the shop BS me before? Any ideas?
Last time I passed emissions I ran it through with 1 injector unplugged. Kind of a ghetto trick, but it worked (barely)! I am considering trying this agian. The time before last, I took it to a local shop and they couldn’t come up with an issue with my car and blamed tuning (TRM). They said they passed me by running a 325i (m50) chipped DME. The theory here is that the tuning is detuned for the smaller motor. I snagged a m50 chipped DME and plugged it in today and it seems to smell “richer” at idle than it did before.
So does anyone agree with this theory or think that running my modded obd1 s52 chipped with an m50 chip will “detune” it and get it to pass emissions? Did the shop BS me before? Any ideas?
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