Fast idle

Hello,

A high idle is usually a sign of a vacuum leak. Here is a link down below that describes how to find a vacuum leak:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please go through this guide and get back to us with what you are able to find out. We can go from there, if necessary.

Thanks,
Alex
2CarPros

Hello again,

The catalytic converter is used further down in the exhaust. It's job is to take harmful exhaust pollutants and break them down into non harmful byproducts, such as water for example. The Exhaust Gas Recirculation[EGR] is used to take exhaust gas, before it goes to the catalytic converter, and is reintroduced into the engine's combustion chamber through the throttle body or intake manifold when the Power-train Control Module[PCM] determines that the conditions are right for it to be burned. This is undoubtedly what melted the hoses as the tube coming from the exhaust manifold get very hot with exhaust gas. Ensure it is routed correctly or that heat wrap is around where it comes close to other components. I hope this helps.

Thanks,
Alex
2CarPros

Hello

EGR valves are usually vacuum operated PCM/ECU[computer] controlled valves that allow exhaust gas to be recirculated from the exhaust tract into the throttle body/intake manifold to be reburnt in the engine's combustion chambers in an attempt to further reduce harmful emissions. So by nature the tube coming from the exhaust to the EGR valve will get hot as it is carrying hot engine exhaust to the EGR valve. Sometimes what happens is you get exhaust particles that collect and plug off the tube or cause the EGR valve itself to fail. But when these conditions happen the PCM/ECU[computer] will set a Direct Trouble Code[DTC] and illuminate your vehicle's Malfunction Indicator Lamp[MIL] or "check engine" light. It's possible that the tube from the exhaust tract to the EGR valve was misrouted or heat shielding was damaged causing this to happen. Double check it routing and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros

Hello again,

Is there anyway you can take a picture of what is going on or a video and upload it to the site so we can take a look at what's going on?

Thanks,
Alex
2CarPros

Hello again,

This happened because the EGR valve and the metal tube going to the EGR valve get hot. They get hot because they are carrying exhaust from the manifold to the intake manifold/throttle body to get reburnt. Exhaust is hot. There was originally probably some type of heat shielding there, but it is missing or damaged now. You can purchase heat resistant sleeves for spark plug wires/boots that will probably fit over the tube to prevent this from happening.

Thanks,
Alex
2CarPros