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17:55:11 - 11/14/2024
V6 Dakotas
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Cody
Dodge Dakota
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9/06/2005
17:58:23
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 Subject: very random missing
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Message:
i have a 1990 3.9l that i just rebuilt i was running good before i left of basic training now it misses randomly sometimes so bad it bearly runs. but it will come out of it and run like nothing happined. have no ideas what it is i have timed it over and over and it always reads 9 BTDC where i set it also has new plugs, wires, cap, and ign coil.
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Craig
Dodge Dakota
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9/06/2005
22:44:32
|  RE: very random missing
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Stuck EGR valve? Try a new distributer? It's a tough game guessing over the net. How do your spark plugs look? Fouled, oiled up, broken insulator? A broken vaccum line would probably make for a consistant problem, but I suppose it is a (remote) possibility.
Could be a cracked wire somewhere casuing the random problem. It would make sense given the recent overhaul on the engine, some wire might have been carelessly left out of place. Maybe a ground wire.
I assume you've already run a compression test on the motor to try and eliminate a fault in the rebuild job. Did you get a Chrysler rebuilt motor or did you have it done at a shop, or did you do the work yourself? I generally recommend that people get factory rebuilt motors (and transmissions) because of the superior consistancy in quality of the factory rebuilds.
Another thing- you said you just returned from basic training- did the truck sit outside? If so, it is possible that a little varmit of some kind chewed on something important- you'd be surprised what those little suckers can chew through- like a braided stainless steel fuel line!
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bigdave
Dodge Dakota
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9/07/2005
03:49:24
| RE: very random missing
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Check the wires that go to your coil. Mine was stalling and bucking after a rebuild. It was a broken wire, it was cutting out at certain speeds and RPMs, very sporratic.
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