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06 engine in 05 truck
I have installed an 06 engine in my 05 3500 dodge dually and my fuel mileage has dropped to appx 10 mpg when towing. Before I could get 18 loaded. Do I have to get the computer reprogrammed? What else could be going on?
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Any CEL lights or soft codes? Hand calculated mpg?
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No lights
Yes computer says 11.7 but by hand it's closer to 10. No lights are on
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No lights
Yes computer says 11.7 but by hand it's closer to 10. No lights are on
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Are you using the 06 or 05 ECU?
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05
The 05 computer
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That might be your issue right there.
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Originally Posted by 11B/11C
(Post 1131196)
That might be your issue right there.
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Originally Posted by Billyjoeo
(Post 1131197)
might be or is does anyone know for sure?
The 2005 ecm runs the truck using the SCI interface, while 2006 up uses a MUCH more complicated CAN bus system. carcomputersystem posted on here on 4.18- send them a PM and get an 06 computer. The best thing is you can get EFI tuning with your 06 ecm so you can increase your mileage over your stock 05 #s! |
I was pretty sure it was your issue, but wasn't positive. Likes like he found your answer.
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