I recently swapped my tbi throttle body. And now when I turn on my car it idles rough for a few seconds and then stabilizes. Then the SERVICE ENGINE light comes on. Then when I put It in drive or reverse and don't have my foot On the gas, it sputters and dies. When I turn it on again, it does the same thing all over--it idles rough and stabilizes... What could I have done wrong when installing the newer throttle body? When the service engine light comes on, code 33 pops up.