Chrysler Repair: not enough gas or emission, chrysler line, coolant temp

Question
when i drive my my car for about 30 minutes and then cut it off and go back outside 15 minutes later i start the jeep and give it gas but it seems like its not getting any when i put it in drive it acts like it wants to die on me.i recently changed on air filter and there was a lot of  dirt and oil inside the frame that the air filter sits in.i have 1993 jeep cherokee in-line 6 cyclinder

Answer
Hi Quinsandra,
I have to admit to a lack of expertise about Jeep vehicles, though they are part of the Chrysler Corp. I haven't worked on any of the Jeep engines since about 1960!.
But based on other contermporary engines, I could suggest a couple of things to check. On the build up of dirt and oil in the air filter, it may be that the PCV valve or its associated hosing is not functioning properly. This system is designed to take care of blow-by exhaust and oil by sending it from the crankcase to the intake manifold in order to be burned. If the valve becomes plugged or the hoses that handle the recirculation crack or break at a fitting then all this crud builds up in the engine and produces what you described. So I would replace the PCV valve and while you do it check all the hoses that are attached to it.
The other item, an inability to start from a warmed up situation usually is due to a temperature sensor that is not reading properly. The one on the intake manifold is the most likely one, if your engine has one...it is called a charge temperature sensor. In the other Chrysler engines it should read 7,000 to 13,000 ohm at 70F (cold engine) and 700 to 1,000 ohms at operating temperature (200F) when the meter is place across its two terminals. The other sensor is the coolant temp sensor, located near the thermostat housing, and it should so identical resistance values at the charge temp sensor.
It also may be the case that the engine controller can detect and store information on engine malfunctions in the form of two digit fault codes. On the Chrysler line you can read these out by turning the ignition key: 'on-off-on-off-on' and then watch the check engine light on the dash to flash, pause, flash, pause, etc. Count the number of flashes before each pause and keep track of them. Repeat the readout to verify what you wrote down. Then take the numbers two at a time in the order of readout to form the two digit fault codes. Let me know if your engine has this feature and what the codes are that you read.
Roland