2000 s-10 2200 engine when it's cold out it will not start,it cranks over good but will not hit.I have put plug wires,plugs fuel filter.the fuel pump is about two years old fuel pressure not running is about 42 engine running 38

Why did you replace the fuel pump? Did you test fuel pressure? Test the electrical circuit for the fuel pump? Do you know how to do that? Does it have spark? Put a spark tester on a plug wire an crank the engine. What fuse an relay are good ,fuel pump .

1995 Oldsmobile 88 Crank No Start AGAIN Part 2 No Fuel Delivery / EASY FIX! - YouTube

Sounds like you have a fuel problem like the fuel pump or a clog fuel filter.

If I remember correctly that Jeep had a mechanical fuel pump attached to the engine. I suggest you disconnect the fuel line before the fuel filter and put a pressure gauge on the line. Crank the engine for at least 15 seconds and go see if you have at least 7 lbs of pressure. If not, you need a new pump. It that was good, now disconnect the line AFTER the fuel filter and see if you have a sufficient volume of fuel coming out. For that I suggest you have someone else crank the engine while you hold the hose in a pail. If the stream is weak, change the filter, reconnect the line and see what happens. If it still starts and stalls it could be a clogged carburetor.

Did you do a spark check by holding the plug wire away from the engine while someone cranks it? With a spark plug in the wire, hold it at least 1/2 inch from the engine while someone cranks it. That spark should be able to jump off the plug and into the engine. If not, you have a weak coil. If the spark is strong and you have the correct plugs installed, then it almost has to be the carburetor.

Good luck with that, I have fond memories of older jeeps.

Well, there are several basics your engine needs to start: Spark, fuel, compression, and correct valve timing. I am going to assume on good faith that your GT has the 3.4 liter V6. Here are a couple basics on checking fuel and spark:
GM usually puts a schraeder valve (looks like a tire air valve) on the fuel rail. This is where you connect a fuel pressure gauge to test the fuel pressure. It should be 52-59 PSI when you turn the key to run.
If your fuel pressure is good, remove a spark plug wire from one of the front 3 spark plugs. If you have a spark tester, connect it to the removed plug wire. If you don't have a spark tester, remove the spark plug. Plug the removed spark plug or tester into the plug wire. Touch the metal threads of the plug or tester to a good solid metal part of the engine using gloves or non-conducting (plastic) pliers. Have someone try to start the engine. Watch the gap at the end of the spark plug. You should see a bright blue/white spark and hear it snap every time it fires. If you don't, there may not be any spark getting to the engine. Diagnosis of the problem can be far trickier from here on out. You will need to be able to diagnose electrical problems in the fuel/ignition system to find the root cause of no fuel/no spark.

If you cannot hear the fuel pump run in the tank when you turn the key to run, try lightly rapping the bottom of the fuel tank with a hammer turned to its side (don't put a hole in your fuel tank!) while someone cranks the engine over. If the engine starts, most likely cause is a failed fuel pump. Don't expect the car to keep starting on a regular basis if it does start by hitting the tank. The fuel pump will need to be replaced.

faulty engine coolant temperature sensor cause no cold start problems.but make sure engine has good spark plugs and wires.clean fuel injectors and new fuel filter.during cold start up or morning start up engine need rich fuel mixture good spark to start.

could be a number of possible faults.1/crank sensor not working when hot,trace this and pour cold water on it(dont do this if it is not by crank pulley as water isnt good for modules etc) and retry.2/sparkplugs worn,but usually they would fault more on cold start.3/fuel pump cuts out when run,try wacking tank from underneath and retry.though I would concentrate on nil spark caused by a faulty ignition module or crank sensor.
Next time it fails to start.pull off a sparkplug lead,make a quick test plug with an old(but working)sparkplug.pull the side wire away from the center electrode 5mm and insert into plug lead.earth ground the plug on its thread against metal on the engine.crank and check for spark visually,don't be tempted to hold the plug while cranking.if nil spark we will have to test further which is faulty sensor.if it sparks ok we will need to test for fuel.
testing for fuel is easy.
when it fails,unclip air filter housing,while engine is being cranked,spray an aerosol based carburettor cleaner into air duct to engine,it should start and run while spraying and stop when you stop spraying if fuel delivery is the fault.fuel pump will then need testing/replacing.
be careful not to spray onto ignition or any areas of spark

The plugs should be replaced every 80,000 miles. Fuel filter every 25,000 miles.
Long cranking times with a cold engine are most likely a result of a defective checkvalve in the
fuel pump,causing pressure to bleed down at rest.Also recomend cleaning of injectors and air
intake system.

1) Does is crank / spin properly?. Good battery and connections?
2) Does it have high mileage? Check compression.
3) Fuel injected? Maybe cold start valve not working properly.

My best guess is check fuel delivery. Clean? filters, lines, good fuel pump?
Also ignition could be faulty. Good plugs, wires, cap and rotor?

Good luck!

Start with the simple and replace your fuel filter, a dirty filter can cause your engine from starting. At worst, your fuel pump has failed and will need to be replaced. Before replacing the fuel pump, inspect all the fuses and wire leads from the fuel pump harness. Note: that the ground wire is separately grounded at the frame, so inspect that for any damage due to corrosion.

You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 63-64 lbs.
If you have all 3 then move on to injector pulse to all injectors. I think each injector is on a seperate driver on that one. Check for pulse to all of them.

You may be weak on fuel pressure, even a couple of lbs low on a cold start will cause a no start. Double check cold start cranking fuel pressure. If under 63-62 lbs you have problems. One test is to give it a squirt of carb cleaner not starting fluid. If it starts then you have a fuel pressure problem.
Run the full fuel pressure test, here is the guide lines on testing.
Hard to start cold.
Check cold start fuel pressure.
Check engine running fuel pressure.
Check engine running on the road fuel pressure.
Then shut it off and watch for fast leak down.
Pinch off at rubber part or block off return line and check full pressure. Later V6 and V8 gm engines should have 60-66 fuel pressure.
* Cold start should be 64-65 lbs of pressure. If you do not have full fuel pressure on a cold start the injectors will not squirt fuel.
* Engine running should be 60-66 lbs pressure depending on engine load.
* Full pressure with return pinched off should be 75-85 or more. and if it has a fast leak down after shut off you have a leak.

The 75-85 is only a check on the capable full pressure of fuel pump. If you can not find the rubber return line check full pressure by plugging return line or just or the true full pressure can be taken direct at the end fuel filter.

Are you getting spark to the plugs?? Take off a plug wire and put close to block 1/2" or so)and have someone crank engine-- is there spark?? if yes check ur fuel system--Fuel system could be plugged( filters) or worst fuel pump .