Jump to content
MackFarmer05

'03 CX613 427 mileage and boost

Recommended Posts

I've owned this truck for a few years now and still have not been able to get satisfaction out of my dealership which I did not buy from, private sale. Although I have had numerous issues the mileage is the last major still to solve. The truth k has had a few 3 fuel pumps replaced, new turbo, intercooler, the ECM tuned to 500hp and EGR delete with blocker plate. Under full load boost will hit 40psi@1200rpm dropping to ~30psi@2000rpm. It has anever Eaton 9 speed with 4.11 gears and runs 1650rpm@65mph. I can only squeeze 4.9mpg out of it even while averaging 50mph. I'm lost and dealership is no help at all.

Share this post


Link to post
Share on other sites

Averaging 50 mph? I'm guessing you are doing some stoping and starting? You only get better than that when you are going in a straight line for many miles at a time.

Share this post


Link to post
Share on other sites

I average +50mph on a tank. I travel interstate 65mph idle while loading and unloading. I have a 93 Ch613 with 350 running the same trips and it never gets worse than 5.5mpg even with lower average tank speeds. Also the EGTs have never gotten higher than 800 on the CX.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...