Posted 08 October 2005 - 09:51 PM
Fuel system lean, 2 trip logic
When A/F ratio feedbakc is stable after engine warming up, the fuel trim is considerably in error on the RICH side.
(Engine is running lean, fuel trims are out of spec adding fuel)
Knock Sensor 2 Circuit Malfunction
No knock sensor 2 signal to ECM with engine speed 2,000 rpm or more.
They shouldn't have let you out the door without plugging in the tester & going for a 5 min drive. The end result is you blew the engine up just the same as if you were running a 500bhp turbo, or nitrous shot just cruising down the highway. Same damage, just takes longer.
No, when swapping engines, the manifolds & o2 sensors 90% of the time come on the engine as it's easier to leave them there & unbolt the pipe from them. (4 nuts, VS 12)
I would find out what the codes are now. If you don't have a multi-meter to start testing parts, or don't feel like paying bad techs to continue to troubleshoot, just start buying parts from a junkyard.
Start with the MAF.