69MyWay
Well-known member
Please post a list of the symptoms your cars developed prior to determining you had a bad opti spar unit.
ex,
Hard start, miss fire at speed, poor power, back fire, check engine light (and the code that appeared when you scanned it).
I am trying to diagnose a really freaky LT1 driveability issue where the car runs great, except it will act as if it is suddenly running on six of the eight when you punch it. It will run like junk. Then, out of the blue it will clear up and run great. It can do this withing a 2 minute period of time. The majority of the time, there are no codes present in the system, and nothing out of the ordinary. However, I did notice it slipped into open loop the last time I had the scanner in place well after it was warmed up and running. When it started running poor it had gone open loop, then it went closed loop and started driving better. I suspected the left O2 going lean making the puter think it was needed the open loop circuit.
I will be running my scanner as well for the next day or two.
I have been getting a left bank O2 lean code. However, nothing seems to add up to that regard.
Thanks,
btw, I am running this combo in a 1936 Ford. I put it together for a fellow last year, but the car has been plagued with issues. I think the engine is trying to rebell and free iteself of the Blue Oval nest.
ex,
Hard start, miss fire at speed, poor power, back fire, check engine light (and the code that appeared when you scanned it).
I am trying to diagnose a really freaky LT1 driveability issue where the car runs great, except it will act as if it is suddenly running on six of the eight when you punch it. It will run like junk. Then, out of the blue it will clear up and run great. It can do this withing a 2 minute period of time. The majority of the time, there are no codes present in the system, and nothing out of the ordinary. However, I did notice it slipped into open loop the last time I had the scanner in place well after it was warmed up and running. When it started running poor it had gone open loop, then it went closed loop and started driving better. I suspected the left O2 going lean making the puter think it was needed the open loop circuit.
I will be running my scanner as well for the next day or two.
I have been getting a left bank O2 lean code. However, nothing seems to add up to that regard.
Thanks,
btw, I am running this combo in a 1936 Ford. I put it together for a fellow last year, but the car has been plagued with issues. I think the engine is trying to rebell and free iteself of the Blue Oval nest.