93' Grand Cherokee, dont start, no spark,no gas preassure

run fault codes and check for MAF/MAP and VAF sensor problems

Take 2 screws out of PCM and replace with shorter ones

If you need further help, reach me via phone at https://www.6ya.com/expert/daniel_2eeb58b2fec3718e

find the oil preassure switch and install a tempeary mechanical guage and eye ball the oil preassure it sounds like low oil preassure

Clogged fuel filter and/or bad fuel pump

GREAT INFORMATION...

however, you were not clear about fuel pressure

was fuel pressure OK before and during the concern...30psi and have you check flow

PLUS...during the concern are you loosing SPARK? Coil is great suspect!

while the code for the crank sensor concerns me I'd start with the most common Jeep concern...the ASD (auto shut down realy)

when you start testing again remember to check the CKP output at the sensor and the CKP input at the computer...you might have a CKP circuit that is worn out

does it turn over?? check coils or coil packs.

If you worried about your gas, put in a bottle of sta-bil or ISOheat. This will remove all water and condensation from the gas. I would also replace your fuel filter, spark plugs and WIRES. Check for any vacuum hose leaks, if needed do compression test to verify that your gaskets aren't leaking.

If you have service/check engine light on, have a diagnostic test done to pinpoint the bad sensor or circuit that is setting it off.

The crankshaft position sensor was seriously problematic in those old jeeps. It's located towards the top of the bell housing slightly to the driver's side I think.

Hi, I had simmilar problem with my 1993 JGC . I ran out of gas and it would not start until the next day. Then it will start and run until I put the brakes on tho stop and then it will die. It starts right back up. Ended up being the voltage regulator in the ECC/ECM. It is at the mechanics shop right now waiting for the ECC to come in.I will post a follow up.
have Fun,
David C

Could be a sensor.I'm thinking more along the lines of a fuel pump or fuel filter.If the fuel pump is going bad..similar symptoms.Would be advisable to install a pressure gauge at the engine,and check fuel pressure when it's acting up.