- Joined
- Apr 8, 2005
- Messages
- 274
- Location
- Charleston, SC
- Corvette
- 1981 Dark Blue Metallic, 2003 AE coupe
OK folks, After enjoying six years of relatively trouble-free crusiing, the old girl is beginning to finally show her age. Here's the history:
About a year ago: new plugs, wires, dist cap, replaced a broken exhaust manifold bolt (driver side), plugs that were in the car were just a tad colder than factory, new ones are correct.
Shortly afterwards, began to get check engine light when warm and idling (clears when driving). Don't drive the girl much (bought an '08 durng this time and she gets the attention) and wrote it off as ECM adjusting to new plugs and corrected possible exhaust leak. Car sat for months at a time between drives. Noticed she was beginning to hesitate while trying to light accelerate on primaries, secondaries kick in and she bolts (open loop?).
Fast forward to today: Finally pulled the codes, 12, 13, 44, 55, 12
Replaced O2 sensor (Bosch exact fit) and discon. battery to clear codes.
Test drove and still the same. Will not accelarate smoothly until secondaries open. Light on at idle and clears when driving. Pulled codes again: 12, 34, 12
Did I just not drive her enough to let the ECM re-learn? I know the 81 ECM is relatively slow, but I'm scratching my head (I do that alot).
I'm not a big motor-head, so go easy on me.
About a year ago: new plugs, wires, dist cap, replaced a broken exhaust manifold bolt (driver side), plugs that were in the car were just a tad colder than factory, new ones are correct.
Shortly afterwards, began to get check engine light when warm and idling (clears when driving). Don't drive the girl much (bought an '08 durng this time and she gets the attention) and wrote it off as ECM adjusting to new plugs and corrected possible exhaust leak. Car sat for months at a time between drives. Noticed she was beginning to hesitate while trying to light accelerate on primaries, secondaries kick in and she bolts (open loop?).
Fast forward to today: Finally pulled the codes, 12, 13, 44, 55, 12
Replaced O2 sensor (Bosch exact fit) and discon. battery to clear codes.
Test drove and still the same. Will not accelarate smoothly until secondaries open. Light on at idle and clears when driving. Pulled codes again: 12, 34, 12
Did I just not drive her enough to let the ECM re-learn? I know the 81 ECM is relatively slow, but I'm scratching my head (I do that alot).
I'm not a big motor-head, so go easy on me.