Welcome to Just Answer. My name is XXXXX XXXXX I will be glad to assist you.
I suspect that you have a fault in the wiring or a faulty TPS or MAF sensor.
Is suggest double checking all electrical connections, battery connections and ground
connections. Clean and reconnect.
Disconnect all connectors and reconnect.
Inspect the crankshaft positions sensor for damage.
Since 7 other shops looked at it, this is not a common concern.
Inspect the MAF and TPS for any faults.
You may also have a faulty computer that intermittently acts up when hot/cold. Try using a blow dryer to heat the computer and make concern present.
Try flexing and wiggling all wiring harness and connectors to verify concern and duplicate.
Please let me know if you have any additional questions by hitting the reply button.
I will be stepping out soon and be back in a couple hours.