chasebruse

I have a 93 F150 with the 4.9 and I've been trying to isolate some problems with the engine. The truck had been sitting a while and I did some maintance work to the truck. I notice extremely high carbon build up on the plugs and a smell of gas in the oil. The engine is also starting easily every time but it runs rough for a few seconds and then it will idle high, around 1500 to 1200 rpm. It runs smoothly once it's been running a few seconds but I've also noticed it never fully reaches operating temperature. I don't know if everything is related or not but check engine light isn't on and I'm not exactly sure where to start.

Thanks

Chris_1

iTrader: (1)

If it doesn't get to operating temperature, the fuel management system will stay in open loop - and dump a lot of extra gas.
Thermostat should be a 192 degree.