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How can i be sure my ecm is out

(1998 Dodge Grand Caravan)
in Bakersfield, CA on September 10, 2012
my 1998 grand caravan is firing on one cylinder coil pack only puts out on front cylinder on far right all injectors are hitting ,My cruise control quit working about 20,000 miles ago and all the lights on the ac and heat controls blink on and off and every other day the guages go out ounce its turned off and cools down gauges start working again. Ive checked everything i could think of such as cam and crank pos. sensors all cruise control is still intact tried to take a reading with a snap-on 5,000 dollar obd reader no comm. plugged in a 150.00 dollar actron reader and pulled 3 codes 1st throttle pos. sens. low voltage,2nd was crank pos. sensor and cant recall the third cuase it only read them ounce now it wont comm. with it either,My question at this point could it be anything other than the ECM PLEASE HELP
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Popular Answer
of Greg's Orange Auto on September 10, 2012
seek a diag and est to be sure your not wasting $$$$$$$$$$
on April 01, 2013
check the resistance on your coil and check for a bad ground
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