last summer i had a engine failure. So i fitted a used fi engine with all the sensors and throttle bodies from the new engine. But kept the ecu from the old engine.
Since then i could not get it to idle properly. It takes long time to start, when doing a cold start it first idels arround 1000rpm and after some seconds it starts to fast idle at 2500rpm. Normally it should fast idle directly after starting.
Then when warmed up i will not idle at all. I idles for some seconds and then stalls immediately just like when you kill the ignition. When driving with just very little throttle it also sometimes cuts out.
For me it feels like the tps sensor is not set up correct. So the ecu puts the overrun fuel cut in when it should not.
The fi lapms show no error code.
So far i have checked the fast idle wax unit, the linkage of it and did syncronize the throttels. But that did not help.
Can you adjust the tps?