My 97 Jeep Grand Cherokee Larado stalls, restarts, and backfires.
I have changed the ignition coil, wires, plugs, rotary cap and the fuel filter and that seems to have not helped. I have had a fuel pressure test and a diagnostic test done, the only thing that I know now to do is change out the computer. If you can give advice on how to fix this problem, I would appreciate it.
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Crank sensor. Its on the passenger side on the top of tranny. Will have either 1 or 2 10mm bolts holding it on. And a plug. My 94 had the same problem. It would run fine then you shut it off and all it woild do is crank. Wait like an hour and it will start back up. New crank sensor and it was fine
change the plugs if it continues to do it replace wire/ coil if I remember correctly these have individual coil/wire for each cylinder its not like older models with cap, rotary button, and individual wires
Cars are like that. I think they like driving people crazy. I\'ve been driven crazy by my Sentra for three months now. Has the fuel pressure been checked? I wonder if your fuel pressure regulator has failed (the diaphragm inside will rupture and suck extra gas in through the vacuum hose attached to the regulator-could be the cause of backfiring). Something to check, anyway.
The ac compressor does put an additional load on the engine. Any minor problem with performance can be amplified with the ac on. I would check fuel pressure and look at the idle air control valve. Also check the computer for trouble codes. Both 6 and 8 cyl engines use a cap rotor and wires arrangement, so it wouldn't hurt to make sure those components as well as the spark plugs are in good working order. The bucking on the road and stalling at stops could be two different issues.
Hi! I had the exact same problem with my jeep before. The wiring (located on the back wall on passanger side to the left) You will see three sets of plugs with a lot of wires on them. I had to get everyone replaced and the wires rewired and sautered together. My truck would backfire so bad it busted my muffler 3 times!! So, try that and I think it will solve the problem.
oil, tranny fluid, and filters: air filter and fuel filter as well. Fill up tank and add 1 can of SeaFoam. Change spark plugs, wires, coil wire if distributor is present - as well as cap and rotor.
If coil packs are present, repalce the plugs and wires, air filter, fuel filter, and have the catalytic converter tested to make sure it's not plugged. This test will also let you know if the O2 sensor(s) are bad or not.
Please let me know if you need any further assistance.
NOTE: start with the cheaper: air and fuel filter. Then work your way up.