I have a 2001 jeep grand cherokee when you let off the gas about 25 mph after taking off from stop it pops?

Question

someone said it maybe because of an exhaust leak
it has a leak but i don't think that's what it is the engine doesn't seem to misfire at all the engine never misses a lick.It's in the drivetrain I'm sure.But where at???????

Answer 1

I may be way off base here, but some of these Grand Cherokees did have a rear drive-shaft binding problem. The front drive-shaft yoke would not slide easily on the transfer case output shaft, and make a "popping" noise like you describe. There was a Service Bulletin on this that involved replacing the drive-shaft and coating the front yoke splines with a special (and VERY expensive General Motors grease). It would be a very expensive repair if not covered by warranty. It doesn't hurt anything, it's just annoying. My advice would be to remove the drive-shaft and coat the yoke splines with some heavy-duty waterproof grease, and see if it helps. BTW, the old Dodge Ram Chargers did the same thing, and that's how we fixed them. HTH!! Good luck with your problem!

Answer 2

What kind of pop would help / Where does it sound like it is coming from?

Exhaust could mean a problem with valves, timing, CAT or RES - Fuel delivery.

Suspension could mean a bad motor mount, bad suspension snubber / U-Joint.

It is easy to check most of if not all of the suspension items yourself / it takes 2 people to check motor mounts normally.
Motor Mounts (AUTOMATIC ONLY):
Make SURE the motor is COLD / not driven in the last 4 hours or so (skipping this COULD damage the transmission). Raise the hood so you can see the motor through the gap. Move the vehicle where you have 10 feet front and rear clearance. Start the car, put on the emergency brake. Press the brake well (don't let the car move) put the car in REVERSE and lightly (LIGHTLY) tap the gas / do this same thing in FORWARD if the motor moves more than 2 to 4 inches (or "Rolls" left or right) you have a motor mount bad - if the motor jumps front to rear / rear to front (sometimes with a thump under the floorboard) you have a bad transmission mount..
The direct of ROLL tells you which mount is bad and allowing the motor to move too far.
(Standard Transmission):
This is the same process BUT you MUST make sure that the vehicle cannot move - it requires 3 feet, or VERY good blocks to keep the car from moving - if you are not comfortable trying it then don't.

U-Joints:
There are 3 ways to test this, the last two are dangerous - so I will only tell you the first. Put the vehicle in 4WD mode, if it is not already, and then shift to reverse, wait for it to 'kick in' (pull slightly) quickly shift to drive as soon as it kicks in shift back to reverse - DO NOT touch the gas. If it pops you have a bad U-Joint.

Rubber Snubbers:
Simple visual inspection works here, use a light if you need to, and look for rubber anywhere under the vehicle that looks cracked, or with parts missing, or rubber on one side and missing on the other. *Warning* IF a snubber has problems it is because of OTHER problems, fixing the snubber does not fix the problem.

For everything else, take it to a shop.

To Replace U-Joints I strongly suggest you replace them all at once - you are already 'there' and parts cost is not that much higher to replace the wrong one.

Answer 3

It sounds like a backfire out the tailpipe then it is a leaky injector. which will make the fuel burn after the exhaust valve has opened. Timing is a thing of the past on an '01 as the computer tells the timing when to change for emissions and performance. But now that I just typed this it could be your cam sensor which tells the computer where it is. In that case you may get a POP. go by an auto zone and get the code reader for free and see if it shows a misfire code or anything at all. then take that to the shop..

Answer 4

it sounds like it may be trying to back fire on you,,do you have any holes in a muffler or anything,, i would check to see if it got wet in under the hood,,sounds like the cap may have gotten wet on it,,or it may have a small amount of water in the gas,,this will cause it to do that also,,other than that there is not much on this new of a vehicle that would cause it,,other than a crossed plug wire,,but you would have a pop ,,and a miss all the time on it,,a loose vacuum line will sometimes cause one to do it once in a while,,other than that,,i dunno,,look it over real good,,and if you don't find it,,you might want to take it ,,and have it checked out,,it may have a sensor going bad on it,,i hope this help,s.

Answer 5

pops usually are caused from unburned gas ignighting in the exhaust by the heat. check the computer codes for egr performance.
sounds like the engine is in a rich burn condition and the computer settings
may need to be adjusted.

Answer 6

Cap getting wet? on an 01? Those things are DIS. Is it a Limited? if it is, it's probably in fulltime AWD and the viscious coupler is kicking in- have it checked out by someone QUALIFIED in your area- someone who has alot of experience with the WJ- preferrably a Jeep dealer.

Answer 7

needless to say, you have computerized transmission, and in case you do no longer then you definately might desire to prepare shifting somewhat greater. it must be which you extremely % new transmission oil. the two that or some thing is incorrect with the computerized transmission. Take it to a expert. desire i ought to help.

Answer 8

Sounds like a backfire, eh?

Something like that could be caused by bad timing.

Answer 9

Pops???? Possible torque converter problem

Answer 10

It's backfiring.