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  #11  
Old 12-19-2011, 06:58 PM
u05006 u05006 is offline
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Hey Maddog, do the authorized CMR tuners just write tunes? Do you think i can show them the problem & based on that they could write a tune?

its really weird because i tried all the different tunes with all octane levels & still the rattle was present
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Old 12-19-2011, 07:12 PM
MADDOG MADDOG is offline
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Authorized CMR tuners normally do their work on a dyno. Other tuners, such as Johan at DS, do it by email. They will ask you to log some engine operating parameters, email them the logs and your stock backup tune, then they go to work.

But first, before you go to that expense, let's see if we can't find this "rattle".

First of all, does it sound like a metallic rattle?

Does it come from underneath the truck?

What is the idle RPM with the tune and without?
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Old 12-19-2011, 07:39 PM
u05006 u05006 is offline
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thanks alot for the help!
yes it sounds like a metallic rattle
it does sound like it comes from under neath the truck it only happens if im driving & step down on the gas hard! Other then that no rattle.
I dont know the exact idle rpm's with/out the tunes but from what i remember they were close together.

again really appreciate the help
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Old 12-20-2011, 07:12 PM
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so i re installed the 87 octane tune & the sound is coming from the engine.
It sounds like a grinding when i floor it. what the hell could that be? PLZ HELP
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Old 12-21-2011, 10:24 PM
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MoparMadness08 MoparMadness08 is offline
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i bet its pinging. it sounds like what i had going on. mine still has some pinging even with the 87 tune. i need to take it to the dyne and see how lean it really is and see if i can fix it. sounds like you need to do the same thing. hel mine has a light ping even with out the tune.
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