Question about 1996 Jeep Grand Cherokee

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My jeep wont start. wiit will turn over but wont catch. could it be my spark plugs?

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It could be the plugs but only in a roundabout way. Something else has either caused the plugs to foul to the point that they no longer fire or there is no spark going to them in the first place (most likely) OR there is no fuel reaching them so they have nothing to light. If you remove any spark plug wire and place it very close to a good ground (block etc) and watch it as you crank the engine over, if you see no spark then the most common cause of that is a failed crank position sensor.
If the engine starts if you spray a bit of carb cleaner into the throttle body while cranking, then I'd be looking for a possible fuel pump problem.
There are a number of sensors, fuses and relays that need testing before making any conclusions though. Testing can be done with a good digital multi-meter and using a chilton or haynes manual as a guide.
A hand held scanner can be very helpful as well. Both manuals list common codes and their meanings. If the engine was running, you could bring t to any larger parts outlet as most will scan for you free but not running, you really don't have that option.
If you need any help with anything along the way, just ask!!

Posted on Aug 26, 2010


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