NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post - Newly Cammed LT1 Runs Poorly In Closed Loop

1994lt1 · 05-11-2012, 08:21 PM

Alright well heres the update, I hope I havent lost people's interest because I need you more than ever!

Replaced the plug wires with new, also did brand new AC o2 sensors and a new throttle body gasket. Car started right up like always and ran at 800 rpm (desired idle). I took it out for a ride and it did seem noticeably better than before, however still has SES light (code 33 low MAP).

Now what is interesting is that the light only comes on during light throttle operation or idle situations. When accelerating or at increased rpm it does go away. This to me says vacuum leak more and more. When the car is "acting up" it bucks and knocks and makes weird noises out the intake. (Weird?)

How do I go about finding a vacuum leak? Where do I look?

05-11-2012, 08:21 PM	#50
1994lt1 Join Date: Jan 2009 Location: Matamoras Pa. Posts: 434 iTrader: (0)	Alright well heres the update, I hope I havent lost people's interest because I need you more than ever! Replaced the plug wires with new, also did brand new AC o2 sensors and a new throttle body gasket. Car started right up like always and ran at 800 rpm (desired idle). I took it out for a ride and it did seem noticeably better than before, however still has SES light (code 33 low MAP). Now what is interesting is that the light only comes on during light throttle operation or idle situations. When accelerating or at increased rpm it does go away. This to me says vacuum leak more and more. When the car is "acting up" it bucks and knocks and makes weird noises out the intake. (Weird?) How do I go about finding a vacuum leak? Where do I look? __________________ 1994 Z28 A4, Magnaflow, TTII'S, CC503, 1.6' RR, MadZ Tune, Pacesetter Lt's, 3'' ORY, K&N CAI, Free Mods, Nitto Dr's.