Question about 1997 Jeep Grand Cherokee

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1997 Jeep Grand Cherokee. Stalls out,engine quits running

Engine dies all the time! Blew out muffler twice.Replaced muffler and catalytic converter with o2 sensor. Still stalls out and backfires.Some days no problems at all.But most days still dies 2 or 3 times on 18 mile drive to work.Will backfire on expressway and die out.Sometimes it will start right back up and other times take 5-20 minutes to get started.It has 200,000 miles and plugwires and plugs were changed about 75,000 miless ago.Does not have to be hot for it to die on me, weather or engine temp.This is very troublesome for me! Please help!

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Since its a 1997 your jeep has EFI, electronic fuel injection. The most probable reason for your troubles would be the injectors or a problem with the computer controling them, not allowing enough gas to be pushed into the cylinder causing stalling or lack of power, also too much gas iin the cylinder can lead to back firing and stalling. This would also explain the reason it takes so long to start back up some times, all the excess gas in the cylinder is flooding the motor and u have to wait till the gas disipates till the engine will turn over.

Posted on Mar 23, 2009

  • ca a Feb 03, 2014

    Ok today driving to work it stalled or tried and didn't do much tonight but tried once or twice. I replaced horn and fuel pump relay so its not the relay because it still back fired and tried stalling, If it were the pcm I cant see throwing it in neutral and revving it slightly which seems to prevent the stall....as a pcm issue. As of now I'm thinking pressure regulator, filter and pump replacement.

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Hi,
Have you checked your exhaust system? Clogged catalytic converter/muffler etc. will cause back pressure and eventualy kill your engine too. Bad converter will do this real bad. I usually shake the converter, if anything rattles inside, usually bad. You can unhook the exhaust in fron of the converter (right off the manifold(s) and see if that does it. Mike

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I have a 97 jeep cherokee that stalls and backfires and it has backfired to the point where it blew open my muffler. It doesn't backfire all the time, just at times...what can it be?


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Replace muffler, not the catalytic converter which started to rattle. Stop running, will crank but will not start. can it be the catalytic converter.


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Cadalaic converter has trash in it


The catalytic converter in most cases has a ceramic honey comb structure that is fairly fragile and when they rattle, this structure has probably disintegrated. I wouldn't wait too long to replace it since the broken ceramic will migrate downstream and eventually clog your muffler which will then also require replacement once it is clogged enough to gag the engine or blow doughnut gaskets out.
You can see a picture here:
Catalytic Converter  
Page down from the top of the article for the pix.

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Engine Back fired, blew out muffler.


Sounds like you may have gotten some debris in your exhaust pipe or something was clogging your muffler. Maybe the innerds of you Catalytic Coverter went and got stuck or the innerds of your muffler gave out. That would be the only few things I could think of to cause something like that.

Sincerely,

JC

Nov 16, 2008 | 1997 Jeep Grand Cherokee

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