1998 jeep gc won't start - JeepForum.com
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post #1 of 9 Old 09-04-2019, 03:46 PM Thread Starter
thorpe991
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1998 jeep gc won't start

So 2 months ago my inlaws gave me this 1998 grand cherokee 5.2 v8. It didnt start an had no connection from the pcm. Hasn't ran in 3 years. Been doing research an found multiple issues that could cause this. Iv changed the crank postioning sensor, changed the 20amp fuse in the pdc. Has fresh fuel. Battery is new. It cranks but wont start. But i now have connection from the pcm. The fuel is pumping to the engine. After a minute of cranking you can smell fuel up front from the throttlw body. At wot while cranking you can hear a popping noise from the intake but its random. My next thought is bad coil/ plugs/wires. Is there anything else it could be? Am i missing somthing obvious?

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post #2 of 9 Old 09-04-2019, 03:59 PM
winging it
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The first thing that I would do is disconnect and clean the engine bay ground connections. That is each and every large gauge wire connection that goes to the body, chassis, or engine block. I would also recommend upgrading your battery cables, terminals etc etc.
If you do this you will definitely save time and money on sensors that are reading false problems because the voltage is being diminished by bad connections. Good luck!

GW
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post #3 of 9 Old 09-04-2019, 04:55 PM
jtec
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need to check fuel pressure with a gauge post PSI.
Is there spark at several plugs when cranking?


Have you looked at plugs? might be a time for a fresh set after several years, same fro cap and rotor.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #4 of 9 Old 09-04-2019, 06:23 PM Thread Starter
thorpe991
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Quote:
Originally Posted by jtec View Post
need to check fuel pressure with a gauge post PSI.

Is there spark at several plugs when cranking?





Have you looked at plugs? might be a time for a fresh set after several years, same fro cap and rotor.
Havent checked plugs yet was more worried with the computer not connecting.

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post #5 of 9 Old 09-04-2019, 06:25 PM Thread Starter
thorpe991
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Quote:
Originally Posted by winging it View Post
The first thing that I would do is disconnect and clean the engine bay ground connections. That is each and every large gauge wire connection that goes to the body, chassis, or engine block. I would also recommend upgrading your battery cables, terminals etc etc.

If you do this you will definitely save time and money on sensors that are reading false problems because the voltage is being diminished by bad connections. Good luck!



GW
The grounds are all clean. The terminals look rough but no corosion

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post #6 of 9 Old 09-05-2019, 09:52 AM
jtec
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not connecting - how did I miss that IDK

check cavity 16 of DLC is there 12volts?

Does the CEL come on at every start for @ 3seconds then go out?

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #7 of 9 Old 09-05-2019, 03:45 PM
RepBolt
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I had replaced my battery terminals recently since it was corroded.
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post #8 of 9 Old 09-05-2019, 03:46 PM
RepBolt
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It could be the crankshaft sensor, cam sensor, fuel pump or ignition sensor. In my case, it was the ignition sensor.
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post #9 of 9 Old 09-05-2019, 08:03 PM Thread Starter
thorpe991
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Crankshaft sensor has been replaced. Just seen that the diatributor has a plate in it that senses the camshaft postion an if that brakes it can destroy the distributor. Sunday im taking the distributor off an checking that

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