1997 jeep grand cherokee dies like clock work..., dies once or twice after 10-20 min.of running when decreasing from highway speed to 10 miles an hour, or at highway speed it hic-ups like the key is turned off & on for a split second...after both symptoms it runs fine for the rest of the trip. replaced distributor, plugs, wires, fuel pump relay,air idle control sensor, crankcase sensor. also when it dies theres a smell of gasas if its flooded, 205,000 miles

Marvin

• 85242 Answers
• Posted on Mar 12, 2009

SOURCE: '97 Jeep Grand Cherokee Ltd 4.0 liter; Will start but cuts off.

have u replaced the crankshaft position sensor? do u have any computer trouble codes? Kragen or Autozone will run the test for free.

SOURCE: 1995 JEEP GRAND CHEROKEE RAN AND DIED WILL NOT START

IS IT THE 4.0L?IF SO U MAY HAVE A BAD CRANKSHAFT POSITION SENSOR.

SOURCE: jeep wont hardley idle ..when speed gets up to

Sounds like a possibility of a vacuum leak. Inspect the vacuum tubing for damage or wear or just not being connected. One mechanic's trick is to spray carburetor cleaner on the vacuum lines with the engine running. Use safety goggles when trying this. If there is a vacuum leak - when the carb cleaner hits it the engine will speed up.

SOURCE: 1998 Jeep Grand Cherokee Laredo 4.0 6cyl, when i

Have you checked the coolant temp sensor. They also have something called a MAP(manifold absolute pressure) sensor that could be causing this issue. This sensor will have a 4 pin connector and 1 vacuum line going to it. Should be on the firewall, just behind the engine.

SOURCE: 1999 jeep grand cherokee keeps missing and smells

Try changing the O2 sensor before the catalytic converter... mainly if you have seen a change in the gas mileage.