Quote:
Originally Posted by 370Zebruh
... Heard its bad to run bolt ons without a tune because it can cause the engine to run lean but all I have are the test pipes everything else is stock.
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For minor mods, the ECM will adapt.
Intake mods only - no tune required.
Exhaust mods only - no tune required.
Intake + exhaust mods - tune required.
If the test pipes are going to be your only mod, go ahead and get a tune (not because of the mod but to get max performance). If you plan on making more mods, wait on the tune.
Edit: The O2 sensor may have been damaged during the test pipes install - especially if power tools were used on the nuts/bolts. They aren't very rugged.