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this started about 3 mo ago the jeep sat for about a year but was started and moved a few times  i drove to my house and it ran fine  it sat for a mo  than started it and it ran fine till i got on the road it acted like it ran out of gas  but tank was full tryed to start it would start right up go a little than stop again wait f5min it would start go a littl efar same thing than it came out of it and drove it for about 2 mo than i went out and started it it ran for 5 min and died  started it up and backed out the drive  it died again 3 times till i finelly got it in the driveway now it wont start at all the fuel pump is kicking in when key is turned on  and there is a lille pressure atthe fuel rail  but it has the coil packs and i cant check spark  no problem with gauges  no codes that i can see  please help  

i worked on a chrysler the other day.. 1998 model i think.. i was still able to cycle the key on, off, on, off, on, off, on.. within 10 seconds and the check engine light was flashing 2 digit codes.....

the lowest code would be a 12...   the last code would be a 5 5...  thats five flashes.. a short space and five more..


sitting for a year... i worry about fuel quality...  current fuels do go bad when the gas sits...

i also worry that the fuel pump is going bad..

there should be over 48 pounds of pressure as i recall..


with care...   and a plastic quick release tool to spread the fingers of the fuel line latch.. you should be able to disconnect the fuel line from the rail...   Dorman sells new fuel line clips  at most parts stores...  try cranking the motor  while having somebody direct fuel into a plastic bottle...     you should get a significant amount... over a pint in 10 seconds..


the 2000 may be a return-less fuel rail system...  so the only fuel return is down at the filter or at a pressure regulator under the car or in the tank...    i will have to check...

cycle the key and see if you get codes..   3 times on in under 10 seconds with the last time in the on position..  

ok i will try to get code but i have tryed before and the light just burns steady  but i might not have done it fast enough  

ok i just tryed it and i get no flash of the engine lite than i had someone crank the motor over while i had the fuel valve on the rail open and had preety good pressure  i think it might be spark but don,t know how to check  because of the coil pack right on the plugs  

you will then have to plug in an OBD2 scan tool that displays live data... so you can see all the sensors.. and what they are doing..


this is a chart that i keep handy for gm cars...

http://repairguide.autozone.com/znetrgs/repair_guide_content/en_us/images/0900c152/80/06/7e/6a/large/0900c15280067e6a.gif

shows what the sensor readings should be on a gm.. as displayed on a scan tool...     the readings for a Mopar may be slightly different but not that much...

there are crank sensors and cam sensors... and a whole bunch of things that could go wrong.. all the way back to the ignition key..

not all obd2 scan tools read live data..

there are charts online and in service manuals for NO start.. but you will really need a digital volt meter and a OBD2 scan tool...

the harbor freight tool 98614 scan tools work.. and are about the cheepest out there.. at 140 bucks..  and work on any car 96 and up..


without a scan tool... you cannot tell whats happening..  and just swapping parts gets really expensive...  

ok i got the scan tool  harbor freight 98614 and the code i got was p0455  and that is just about it  not sure how to do the start trouble codes  

ok.. po455 is a leak in the evap system

http://www.obd-codes.com/p0455   is a quick link.. but it won't start it from starting...

do you have the manual that came with it..???/

here is the PDF copy
http://www.harborfreight.com/manuals/98000-98999/98614.pdf

page 31... section 5.3

5.3 Live Data
Viewing Data
The View Data function allows viewing of live or real time PID data of vehicle’s computer module(s).
1) To view live data, use UP/DOWN scroll button to select Live Data from Diagnostic Menu and press ENTER button.
Diagnostic Menu
3/11 Read Codes
Erase Codes
?Live Data ?
View Freeze Frame
I/M Readiness
O2 Monitor Test
2) Wait a few seconds while the scan tool validates the PID MAP.

3) Use UP/DOWN scroll button to select View Data from Live Data menu and press ENTER button.


Viewing Complete Data Set


4) To view complete set of data, use UP/DOWN scroll button
select Complete Data Set from View Data menu and press ENTER button.

…………………View Data…… ……… …..
1/3
? Complete Data Set

5) View live PIDs on the screen. Use UP/DOWN scroll button for more PIDs if anorarrow appears on the screen.


read  this section of the manual....


~~~~~~~~~~~~~~~~~~~~~

you can then see if all the sensors are displaying the proper values.. you can also look at the cam and crank sensors to see if they are producing proper signals...  

ok i will print that out and go try it  thanks  

well its fixed it was the crank senser it gave no codes  but after changing it started right up and ran better than before  so i ck the old senser and it was stuck in the open postion  but its all good now  but it is a pain to change  

the scan tool showed no rpm while cranking...   that is one of the many reasons for a scan tool... too see what the ecm sees...

enjoy your scan tool   you will find it helpful on many many cars...