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This is my first post. I'm a fresher.
I just completed my 1996 non vvti 1uz swap with stock ecu after 4 years. But i cant seem to fix the followiing issues. I need some help.
1. BLACK SMOKE.
We've been running the engine on open headers for a while without noticing any smoke. But yesterday we installed the exhaust (stock LS400 exhaust up to the center followed by straight pipe 2.5 up to muffler). Theres quite some smoke that comes out at idle and at when revving. It leaves black residue on the floor. Fuel filter and air filter are new. How can i get rid of the smoke?
2. LOW RPM AT IDLE AND WHEN YOU REVV IT DIES WHEN RPM FALLS.
We didnt have this issue before installing the new filter. It all started after the air filter was installed. Rpm drops to as low as 200. Sometimes it dies other times it goes back to about 650-750.
Before the filter was installed, rpm at idle was btwn 800-1000.
Any help would be appreciated.
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