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    454 crusader back fires in rpms of 3200?????

    can any one help?motor back firesd in rpms of 3200..starts fine idles fine and runs fine up until about 3200 rpm.also haveing a bit of heat issue...related in any way???:confused:
  2. E

    454 crsader new heat exchanger and still running a bit hot?????

    originally i was mixing exhaust with radiator fluid,leavein nothing but black water in my resivor tank.and causeing the motor in rpms over 3000 to run as hot as 190 and clims into the 200,in idle as hot as 165/170.i went ahead and replaced the heat exchanger for a new one,:/ not cheap at all...
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