1990 Dakota dogs out, nearly dies - HELP!!!

We own a 1990 DODGE TRUCK DAKOTA 4WD 6 Cylinders 239 X 3.9L FI
Several years ago, it started running rough and dogging out on acceleration. It was like it was only firing a few cylinders. At first it only happened
in the winter or when it was cold and rainy. During the summer, the truck ran totally fine. Come cold weather -- we didn't run because it ran so bad.
Then last fall, it started running rough, and dogging out on acceleration all the time. It got to the point, we couldn't drive it because we couldn't safely depend on the accelerator to go when we pushed it -- through lights and stop signs. The vehicle herked and jerked too much for a sane ride.
The power on the vehicle starts to drain when this happens. The lights dim, and it feels like the engine is going to die though it rarely does.
This happens to us at low or high speed. Speed doesn't matter.
It starts up like a champ -- every time. There are no issues with startup.
We're going nuts. We've had it hooked up to diagnostics. It doesn't find anything.
We've replaced the O2 sensor, the ingition coil, spark plugs and wires -- and insulated them with extra corregated pipe, we got a new cat coverter and muffler system as well -- and it is still happening.
My poor husband is going nuts!! Tonight he is thinking of replacing the EGR value, and potentially buying new fuel injectors for the truck!!!
We don't believe it is a vacuum leak because our idle while it does get high -- it goes back down -- which they say won't happen with a vacuum leak.
Last, we realize it could be a leak in the intake manifold, and it could be the coolant sensor.
ANY HELP WOULD BE APPRECIATED. We need this truck desparately. We have upholstered furniture waiting to be picked up. The guy is getting mad at us!!!!
I'd like to be able to help my husband. MANY THANKS!!!!
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Oh -- after we replaced the O2 sensor, the muffler and cat converter -- the beast ran great for two weeks without a hitch -- approximately 100 miles -- then it started up again as bad as ever!!
That's when we replaced the ignition coil, replaced the 02 sensor again and it didn't fix it.
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Read the codes in the computer, turn the ignition keyswitch on and off three times(without starting the engine) and count the number of times the (check engine light) in the dash flashes. These are your diagnostic codes, they should help you find the problem. You can find the code chart on line or in any repair book for chrysler products. Good Luck.
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I guess our model year didn't have the diagnostic code feature. The Dodge book we bought clearly states it.
Damn! Thanks anyway though.
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What book might that be?

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Haynes Repair Manual Dodge Dakota Pick-ups 1987-1996
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That is because they are not ODBII compliant but if the check engine light is on, they can be read with an older style reader.
--
If at first you don't succeed, you're not cut out for skydiving


"Newsreader" < snipped-for-privacy@wi.rr.com> wrote in message
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Newsreader wrote:

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Damn near thinking about it, I tell you!!!
We've just put in nearly $1000 into this old beast.
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On Wed, 27 Apr 2005 16:19:24 GMT, "Newsreader"

Have you checked the inside of the disributor cap for carbon tracks?
Old_Timer
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No...if we found them, what would that mean?
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It would mean to replace the cap...
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Check distributor cam position sensor, change this part out with a donor part either new or used.Read technical bulleton on how to index the distributor.(Google Alpar) <Old_Timer> wrote in message wrote:

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We replaced the EGR value -- and one injector.
IT SEEMS TO BE RUNNING WORSE THAN EVER!!
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Change you fuel filters and might want to think about the fuel pump
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Sounds like Im being an ass...but...
Stop throwing parts at it....and at this point, it sounds like you could have been fixed, and for less, by simply taking it to a dealer, and allowing them to make the repairs..plus, you have their warranty behind the repairs.
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We do think it might be the fuel pump. We changed the filter. Most of the parts we replaced were due. The truck has 130,000 miles on it.
Today we've scheduled a diagnostic at the dealer.
Watch, they'll tell us it was the fuel pump! Would make sense.
Thanks... I'll keep you posted.
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