The jeep is hard to crank as i turn it over - 2003 Jeep Grand Cherokee

you used voltmeter at the pump?> or just didnt here it run
do say this...please. details, matter....
it told you low fuel is it? is the fuel gauge near "E"
why not state that first.?
dead gauges, be 1st right, smacks of gross power loss.
right>? not clear to me what no gauges means.
but the voltmeter is #1 no?

did you tests fuse that look ok. fuse that look ok can be bad.
no gauges, means all dead, no movement,
well the fuel gauge must work , does it, does it match reality?
cranks but never runs. good input there.

does not run for the jeep 3 seconds.? (ASD rules)
no 12vdc power to pump, when cranking,?
01 grand WJ jeep usa.
is the skim lamp off, the cluster lamp for SKIM security is first.
it must go out after key turn on, or it will never run, ever.
I can help.
WJ jeep
this jeep has a voltage gauge, it must read 12v keyon
if not power is lost, or battery low.
if cranks that tells me the fues blew.
skim cuts spark and fuel, not cranking btw.
2002 cluster
http://jeepdied.com/cluster2002GC.JPG
see that lamp 12, if stuck on car will never start but will crank.
the lamp falses if skim is not working or stays on for ******* key.
we SCAN ALL CARS NOW.
IF You can not scan a modern jeep then it can near impossible to diagnose (a hard cold fact)
IF the ASD fails to work, the PCM tells you every time
all 8 ways for it to fail.
but that takes a scan tool (any modern scanner works,)

http://jeepdied.com/no-start.html

Hi ! since you had a hard crank start,you should check first of all whether you had dry battery, the second options was -if battery okay- the ignition switch,third option is not good contact on earthing,fourth option the starter motor itself. What about dirty battery terminals?

engine pulley bearing is damaged need to check which one is loosen

New Crank shaft sensor,& new battery, (check cables) may need ecu reflashed

Need to try the crank shaft position senor. It work off the turning of the crank. It the sensor goes bad then the engine has no idea what position the crank is in, so therefore you won't get it to start. I had to replace a few of these on Jeeps , this is a big problem for Jeeps.

crank senor

see if your engine has a ECT sensor (temp sensor that delivers information to your ECM) they are installed on the intake side of the cylinder head, it usually has 2 cables, have it checked replace if necesary

there good about the crank sensor going bad

crank or camshaft sensor will cause this, a bad crank sensor will cause it not to start or start hard. it controls timing and sends info to pcm for proper fuel mixture and spark at the right time.

check fuel pressure...sounds like pump may be loosing prime