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Unread 02-08-2008, 01:18 AM   #1
jeeprguy
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Join Date: Feb 2008
Location: oroville CA
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94, Grand char limited, Backfire/no power

Looking at picking up a 94 Grand Charokee limited. Problem with jeep is:

Backfiring and lose of power.

I have not had a chance to go check it out yet but hoping I can get some ideas on what to check.

Been done:
Plugs/wires/O2 sensor/timing belt was checked and said to be good.


Wondering if plug wires could be reversed or leaky intake?

Does any one have a small diagram of how the plug wires route to each cylinder?

Any ideas what to check would be most helpfull

Thanks

Rich

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Unread 02-08-2008, 05:40 AM   #2
Turbonut
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Doesn't have a timing belt, but a timing chain. The firing order is the standard 1-8-4-3-6-5-7-2. 1 being left front from driver's seat.
Check distributor cap and rotor, rotation is clockwise.
Compression test.
Clogged exhaust-converter
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Unread 02-08-2008, 06:45 AM   #3
Ruffturn
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Join Date: Feb 2008
Location: Florida
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If it's a 4 liter, the #1 plug wire boot easily gets torn if someone isn't careful when removing it (don't ask me how i know that). If it's torn, it'll arc to ground and cause a miss. Something else to look at would be ignition coil output, but you may have a hard time starting it if the output voltage from the coil was too low. It would certainly cause your other symptoms though.

Hope that helps.
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Unread 02-08-2008, 09:10 AM   #4
jeeprguy
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Location: oroville CA
Posts: 2
Thanks for info. Any ideas what the output volatge should be from the ignition coil? Thanks for firing order. Do you have diagram of how the wires position on the dist? What is accpetable chain play for timing? I am assuming this truck has OBD or OBDII?
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