going to smaller cam cause car to be rich?
07-06-2012, 08:29 PM
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going to smaller cam cause car to be rich? Going from a ls1 w/ a ms3 113lsa mail order tune to a 6.0 bored 40 over with a set of 243's milled 10 thousands w/a a 224/230 .609/.604 112lsa. Car never smoked n has been cranked 3-4 times . Just drove it and developed a light bluish white smoke. SES light came on when driving . Never got over 3 grand on the tach n drove maybe half a mile tops. Could car have gone into closed loop causing to run extremely rich. Exhaust is strong enough to burn ur nose hairs. Any thoughts?
07-07-2012, 06:02 AM
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Just cranked up car and still getting a lil bit of smoke. Pulled 6 plugs so far and none are showing any sign of oil . All plugs look the same so dont think its a coolant issue either. Any thoughts? Possibly just the tune causing the smoking? SES LIGHTS STILL ON TO.
07-07-2012, 07:02 AM
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well, YEAH, it's going to burn rich as hell... Think about it. The open loop tables have set values, and the fuel map is set up for a lot more cam... More intake airflow=more fuel needed to make a stoich mixture. The airflow is now gone, but the PCM is still dumping all of the fuel for it.
07-07-2012, 07:32 AM
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Thats what i was thinking. Thanks. i pulled the pcm ign fuse and batt fuse . SES light was gone but car had to refind idle but no smoke it ran for. 2-3 mins. B4 the smoke came back but was very light. Less than what it was doing i reved to about 2300 rpns n smoked a lil. So im leaning towards the tune causing the light smoke. Sorry guys newbie to this really n was first ls motor ive ever built from ground up . Just paranoia i guess lol. Oh and car on has 1.1 miles on the motor and maybe 20 mins tops of idle and ocassional rev to about 25-2700rpms. Motors quiet as a mouse though . So keeping my finger crossed its bcuz of the ms3 tune which wasnt spot on when i had the ms3 in the previous motor
