I drove my 1999 cherokee (laredo) on empty to gas station about two miles or so. but on the way the car just died on me. so when i went to start car again the car can go on but will not start and the gauges have no pressure (will not move) when on. i put gas ater i died out. and still will no start. please help if know whats wrong...so frustrated...thanks(",)

Please check the:
- Pull up error code, if any.
- Fuel system.
- Ignition system.
- Cooling system.

You need to use a fuel pressure gauge to test the pressure but it sounds like the fuel pump took a dump.

Get a hammer and punch. Tap on punch next to key while turning key. This will free up frozen tumblers in ignition

If the starter dims the lights noticeably when activated the starter is the culprit. If it got stuck and ran with the engine the bearing will cease and the starter will not turn. Dry bendix and or bearings will prevent starter to swing. If the rotor is touching the field coils it will short and will not turn.

long post.
ill reduce it for you.
misfires. (is RPM below 700 then misfire can be normal) for idle speed controls dead.
ISC the isc controls speed, of idle,.
mine stuck like zillion times, in 400k miles. endless.sticking
mine was a tiny gutless stepper motor drive ISC valve.
the cone valve is side gets nasty and sticks (
(PCV gases caused as seen on all engines)
i clean it.
the proof is the easy press of right foot easy raises idle back to 700rpm and engine stops misfiring.
ever get a tuneup this decade or running spark parts 500,0000 miles
for the new world record.?


now the tricky part of ISC, , fully explained in the SM serv. man.
the PCM learns its behaviors.
it learns all hot start settings and cold
so when you key on, it goes to the correct HISTORICAL spot.
if it can move there(sticks) engine car race.
or run too slow,
cold start would be worse, as hot isc is more closed
so if sticks there closed, the next cold start will be horrid
some newer manuals telly you to add 5% throttle if car is hard starting this is so common.

clean it. end story.
ISC

Air temp and humidity level can change mpg calculation two tenths. BUT, that does not account for the huge disparity in your numbers. You may have something wrong with the trip calculator or, there may be a leak somewhere. Have your codes scanned. MPG can drop suddenly if an O2 sensor fails.

Try some "heet" , STP gas treatment or the like. sounds like you might have some bad gas.

Check to see if the fuel pump is running after it shuts down...could be a relay or the pump itself (overheating internally) Checked the fuel filter yet? Some crank sensors need to be shimmed. If it's too close to the flywheel even though you recently changed it, if it's too close to the wheel it can fail again. May not be the case but worth checking over. Also check the ceramic resistor on the left fender near the master cylinder if you have one. That too can cause problems.

It sounds like you have some **** in the gas tank that is being drawn to the pickup blocking it.
Have seen this and because it seems so random, it can drive ya nuts.

You might carry a coffee can with you and pull the line from the fuel rail when this happens stick it in the can and just have someone turn the key on for a few seconds.
Beware though, it comes out with force.

Also possible is a failed fuel pressure regulator.
Those aren't expensive and . . . well, not very good either.

OIL PRESSURE SENDING UNIT ON MY JEEP GRAND CHEROKEE LAREDO 1999
WHERE IS IT LOCATED AND IS THERE A DIAGRAM OR PICTURE LOCATION FOR IT

ANY SPECIAL KNOWLEDGE TO PUT IN?