hello every one i have a 99 ranger 3.0 flex fuel and it will never start when it gets below 20 degrees out side no matter what you do unless you plug in its block heater for awhile any suggestions?

 

Engine Coolant Temperature sensor comes to mind.

Are you running E-85?

 

no its not on e-85 it has had this same problem running on e-85 and we switched back to normal fuel for a few tanks and its still acting the same

 

Is your CEL lit? If so, try to have an auto parts store read the codes and post them here.

Can you tell us more about what happens when you try starting the engine. Does the engine turn over normally or sluggishly? Does the engine seem to try start but never fires strongly enough to keep running? Does it turn over normally and doesn't fire at all? How many miles are on the truck? Are all routine maintenance items up to date, especially fuel filter, plugs, spark plug wires? What grade of oil is in the engine. Do you hear the fuel pump run when you first turn the ignition key to the start position.

With answers to questions such as these, we will have more information to work with and then we can help you solve the problem.

 

yes engine spins good have even put charger on it while this was occuring new plugs and wires and fuel filter bout 20 k miles ago yes fuel pump runs when this is happening and no it will not hit at all when its having a spell and yes cel stays on its a ford it always say the egr valve is why its on when you plug it in cant remember the exact code and it just flipped 200k miles oh and 5-30 oil and i assure you its spinning ove fine thats not the cause im thinkin im going to check into the engine coolant temp sensor causeing this

 

What is the trouble code number you get? The ECT could affect the idle speed, maybe the running of the engine. I don't see where it would affect the starting of the engine.

The two things you need for starting are fuel and spark. Have you checked the fuel pressure relief valve and the vacuum line to it? Take a look at the vacuum line to see if there is fuel leaking into from the valve. Also, check the fuel pressure.

 

i have not had a chance to pull the codes although i did put a new enging coolant temperature sensor in it was just 20 bucks and easy to change but we have had a warm spell hear around 50 so not sure if it has made any difference yet