97grand cherokee dies after 200 miles or so

[jftms]

January 24 I PAID OVER A THOUSAND BUCKS TO DEALER BECAUSE MY JEEP STARTING JUMPING AND GOING DEAD WHILE DRIVING BACK FROM A TRIP THAT WAS AS FOLLOWS: DROVE 200 MILES, STOPPED FOR COUPLE HOURS, STARTED BACK AND IT STARTED THIS BEHAVIOR AFTER 100 MILES. EACH TIME IT STARTED ACTING AS IF IT WAS OUT OF GAS, I SHIFTED INTO NEUTRAL, RESTARTED, WENT ON. THEY REPLACED CRANKSHAFT SENSOR, OXYGEN SENSOR, ROTOR DISTRIB, CABLE IGNITION PACKAGE, NEW INJECTORS, TUNE UP, SUPER FUEL SERVICE.

WELL TODAY 2-15, AFTER DRIVING 225 MILES IN SAME PHASE, 190 MILES, STOP FOR 3 HOURS, START BACK, STARTED ACTING LIKE OUT OF GAS AND LIMPING, ALL THE WAY BACK FOR ANOTHER 100 MILES. IT WOULD START RIGHT UP EACH TIME BEFORE I PULLED OVER, BUT WOULD NOT GAIN SPEED RAPIDLY, THOUGH IT EVENTUALLY COULD GO 55 TO 65 FOR A WHILE , THEN REPEAT.

OBVIOUSLY IT ONLY DOES THIS ON LONG TRIPS OVER 200 MILES IN ONE DAY, NEVER ACTS UP AROUND TOWN.

CAN THIS BE A TRANSMISSION RELATED SENSOR PROBLEM AND NOT ANYTHING TO DO WITH ENGINE. BOTH TIMES, I HAD 1/2 TANK OF GAS.

[Cam7]

Sounds like the Dealer did some Shotgunning which is replace enough parts to solve the problem, Which it didnt. The First thing I would check is the Fuel pressure at idle should be around 49 lbs. If the pressure is good and you have access to a guage leave the guage hooked up make sure the connection is tight and check pressure when the problem comes back. Could have a weak fuel pump and when it is hot it might start to shut down. When it is cool it will run.
Some other things to look at are the coil and Cam postion Sensor both will act the same way if there is a short. I would start with fuel pressure First.

[SteveB05]

How many miles are on the vehicle? I'm gonna bet that the strainer on the fuel pump is ripped or gone completely and something is getting sucked into the inlet. If you have over 100,000 miles, its a good idea to change the filter and while your there, go ahead and pull the pump and look at the strainer.

[jftms]

Originally Posted by SteveB05

How many miles are on the vehicle? I'm gonna bet that the strainer on the fuel pump is ripped or gone completely and something is getting sucked into the inlet. If you have over 100,000 miles, its a good idea to change the filter and while your there, go ahead and pull the pump and look at the strainer.

thanks. yes it has 115,000 miles, but first did this little trick a couple years ago on a similar leg of trip of about 200 miles or so. then it did not do it again for months. this year seems to be the charm.
sounds like so many things behave same. but the key is distance on this one

[jftms]

Originally Posted by Cam7

Sounds like the Dealer did some Shotgunning which is replace enough parts to solve the problem, Which it didnt. The First thing I would check is the Fuel pressure at idle should be around 49 lbs. If the pressure is good and you have access to a guage leave the guage hooked up make sure the connection is tight and check pressure when the problem comes back. Could have a weak fuel pump and when it is hot it might start to shut down. When it is cool it will run.
Some other things to look at are the coil and Cam postion Sensor both will act the same way if there is a short. I would start with fuel pressure First.

yep, shotgunning seems to be the trend. Are there any such things as real accurate diagnosis by real mechanics. hell, I might be able to learn to change old part for new part and shotgun search- just takes knowing how to remove and replace. Isn't there a better way?
What is fair charge for fuel pump? what about coil?
thank you.

[Dale Aeppli]

Originally Posted by jftms

yep, shotgunning seems to be the trend. Are there any such things as real accurate diagnosis by real mechanics. hell, I might be able to learn to change old part for new part and shotgun search- just takes knowing how to remove and replace. Isn't there a better way?
What is fair charge for fuel pump? what about coil?
thank you.

I DON'T THINK ITS THE CAMSHAFT SENSOR, WHEN THEY GO BAD IT WON'T START TILL IT'S CHANGED. IS THE CHECK ENGINE LIGHT COMING ON AT ANY TIME IT QUITS. IT SOUNDS LIKE IT MAYBE FUEL, FUEL PUMP COULD BE RUNNING HOT AFTER A WHILE & CUTTING OFF. I HAD TO CHANGE MINE IN MY 97 CHEROKEE SPORT, THERE ARE 2 FILTERS ON THEM ,THE ONE ON THE BOTTOM OF PUMP WAS COMPLETELY PLUGGED. THE OTHER ONE WASN'T ANY BETTTER. SINCE I'VE PUT PUMP ANOTHER TANK, PUMP STILL PUMPS IN SPARE TANK. I JUST WASN'T ABOUT TO TAKE TANK DOWN AGAIN . STILL THINK FILTERS WERE PROBLEM BUT THEY'RE IN TANK. GET FUEL PRESSURE GAUGE AND CHECK PRESSURE. PRESSURE SHOULD BE 39 LBS. MINE HAD 27 LBS. I USED ADVANCE AUTO PUMP IT'S MADE BY CARTER DALE [email protected] give make and engine

[jftms]

Originally Posted by Dale Aeppli

I DON'T THINK ITS THE CAMSHAFT SENSOR, WHEN THEY GO BAD IT WON'T START TILL IT'S CHANGED. IS THE CHECK ENGINE LIGHT COMING ON AT ANY TIME IT QUITS. IT SOUNDS LIKE IT MAYBE FUEL, FUEL PUMP COULD BE RUNNING HOT AFTER A WHILE & CUTTING OFF. I HAD TO CHANGE MINE IN MY 97 CHEROKEE SPORT, THERE ARE 2 FILTERS ON THEM ,THE ONE ON THE BOTTOM OF PUMP WAS COMPLETELY PLUGGED. THE OTHER ONE WASN'T ANY BETTTER. SINCE I'VE PUT PUMP ANOTHER TANK, PUMP STILL PUMPS IN SPARE TANK. I JUST WASN'T ABOUT TO TAKE TANK DOWN AGAIN . STILL THINK FILTERS WERE PROBLEM BUT THEY'RE IN TANK. GET FUEL PRESSURE GAUGE AND CHECK PRESSURE. PRESSURE SHOULD BE 39 LBS. MINE HAD 27 LBS. I USED ADVANCE AUTO PUMP IT'S MADE BY CARTER DALE [email protected]

no- the check engine light did not come on nor any other warnings. I first experienced this problem about 30,000 miles ago in west Texas after driving about 200 miles from fill up. then it did it again a couple of times months apart, then on in mid January and now on same journey after they shotgunned me. So, sounds like the camshaft sensor package, o2 sensor, distributer cap, ignition cables, rotor distributor were all costs in vain? I bought the jeep with 70,000 miles on it, so don't know who spent what before that, but it has cost me over $4000 in repairs since I bought it. IT LOOKS NICE.

[Dale Aeppli]

Originally Posted by jftms

no- the check engine light did not come on nor any other warnings. I first experienced this problem about 30,000 miles ago in west Texas after driving about 200 miles from fill up. then it did it again a couple of times months apart, then on in mid January and now on same journey after they shotgunned me. So, sounds like the camshaft sensor package, o2 sensor, distributer cap, ignition cables, rotor distributor were all costs in vain? I bought the jeep with 70,000 miles on it, so don't know who spent what before that, but it has cost me over $4000 in repairs since I bought it. IT LOOKS NICE.

i just check advance auto they're showing the same pump i bought for all models of grand cherokee 6 cylinder and 8 cylinder around 100.00 $ dale [email protected]

[jftms]

Thanks Folks. Will Try To Get The Dealer Man To Check Out The Iac Tps, Fuel Pressure.

[aredant]

This sounds exactly like the problem my GF has describing to me on her 2001 GC 4.7L. The car will start "bucking" after driving on Hwy after couple hundred miles, but will not do this in town. No engine light. Diags report misfire on injector(s). Posibilities so far seem to be: TPS sensor, CSP sensor, Fuel Pump, Pump Filter/screen, O2 Sensor, AT sensor.

My only similar past experience was with a bad TPS on a '91 XJ 4L. It would act up interm. anywhere and got worse over time until car ran like crap.

I would like to know if you solve this problem.