Car shutting down since header install.
Recently, the manifolds were removed and longtube headers were installed. Now, the car doesn't want to run any more when at idle. The car has to be "stalled up" while sitting at a light. As you can guess, this method is killing the gas mileage.
The car was tuned and then retuned but still could not solve the problem. Any ideas what could be wrong? It really is hard to understand since the cam is so mild.
i believe its the coolant temp sensor...or something like that

