My 1993 trooper is very hard to start when cold

I believe they are located in the intake manifold somewhere. Make sure the one that tells the computer the coolant temp is ACTUALLY giving out the correct temperature. I had a bad one one time in a 1993 Ford F-150, 5.8L....... no check engine light came on but hard to start. The bad sensor was telling the computer it was 32 degrees F when it was almost 80 degrees outside.!!
Garbage in=Garbage out.

Here is a video link from Youtube. There are 2 sensors, 1 for the guage and the other tells the on-board computer how hot/cold the coolant is. The one for the guage has 1-wire and the other one has 2 wires.
Hope this helps, ask more if you need to. What kind of problem are you having? No heat inside? Guage needle not getting into the normal area?


1997 Ford Expedition 5 4L V8 Triton Engine Coolant Temperature ECT Sensor...

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When this stall or fails to start occurs have a pressure gage hooked up to the fuel injection pressure test port (top of engine in the pipe that supplies the fuel to injectors) and see if you are losing fuel pressure.

Is it diesel or petrol

You may want to take a hard look at your Coolant Temperature Sensor.

replace your ign coil pack if it is a solid coil pack,(magnivox).

try using your spare key might be the anti theft sys kicking in

Has the car had new spark plugs lately? Usually hard starting in cold weather is caused by too heavy of oil or worn out spark plugs.

check injectors for leakage when engine off-will have to install fuel press gauge run engine and check press ,turn off engine and whatch gauge -see how long it takes for press to drop,will cause hardstart hot engine-but should start better cold

Sounds like the electronic module needs to be replaced. Unplug the old one take out the mounting screws get a new one at the auto parts place plug it in replace the mounting screws and it should be ready to go it's not hard

Change the fuel pump relay....and let mee know