Ok, this is probably nothing but...I have a basically stock 89 LX 5.0. It has a couple minor bolt-on's motor wise (exhaust, throttle body, bigger airflow meter, fenderwell CAI) and a canned tune from Bama that's stored on a SCT chip. It's one of those free tunes for life American Muscle products that comes with 3 tunes you can select from with a switch (basic canned 91 octane tunes). You tell Bama what mods you have and they send you the tunes. Since my car is basically stock, I figure they just gave me something to raise the timing a little and make the car feel a little more responsive. Car has run fine with this setup for the last year or so (approx. 800 miles...I know I don't drive it much).
Anyway, I recently decided to ditch the fenderwell CAI and go back to the stock rubber flex upper inlet pipe and factory airbox (w/ a K&N drop in air filter). I didn't change the throttle body or air flow meter from before, just the change noted above. Car runs great on the same tune as before and pulls strong, sounds healthy, etc. The only difference is that now ever time I drive it, the check engine light comes on for a couple minutes after the car warms up (within the first ten minutes of driving). The light only stays on for about 2 minutes and then goes off on its own and never comes back on during that driving time. The next time I take it for a drive, it does the same thing, but always goes back off on its own. Car always runs fine when the CEL comes on and doesn't feel any different when it's on. I never had a CEL with the tune before when the fenderwell CAI was installed.
Question is: Since the light only comes on for a couple minutes and then goes off on its own and the car feels and drives great regardless, is this anything you think I should address on a car I drive maybe 800 miles a year? I hate to send the chip back to Bama for a re-flash if it's not really a big deal. The car runs strong as is and I really enjoy the tune. I don't really want to take a chance on having more issues once I get the chip back from Bama with a new canned tune. I'm inclined to do nothing and just enjoy the car but I thought I would get an opinion from some of you on the matter. I sold the CAI so putting it back on the car is not an option. I took it off because I liked the stock look under the hood for the car as it's not really a race car anyway. Just a nice clean cruiser to take to car cruises.
I realize this is a pretty lame tuning question compared to what most of you are building/doing on here but a couple thoughts on the matter would be appreciated. Thanks.
Edited by 89-FOX, 27 May 2015 - 04:31 PM.