Jump to content


  • Upcoming Events

    No upcoming events found
  • Recently Browsing

    No registered users viewing this page.

JoshH

Did some testing today

Recommended Posts

I took the truck out and made some runs with both my ECM and the one I picked up from Rob today. I guess my truck just doesn't want to shift out of second earlier than 3700 RPM when at WOT. No matter what I do it just won't do it. I guess I'll have to live with it. It's all really very confusing.

I'm also having trouble holding rail pressure still. I ordered a fuel pressure gauge today so I can tell if my lift pumps are supplying enough fuel or if something else is jacked up. I was looking at my logs from yesterday and the ones I did today. The tune I first ran yesterday was only 1250 psi low with a 3100 uS pulse, but the same tune today was 4250 psi low. I wonder if my fuel filter is clogged. I changed it on either Thursday or Friday, I can't remember for sure which, but I'm wondering if I got a bad batch of fuel.

Share this post


Link to post
Share on other sites

That is trippy that you can't get the shift corrected.. Hopefully like you said a bad batch of fuel.. Keep us posted what you come up with...

Share this post


Link to post
Share on other sites

Well, I went out and did a little more testing today. I filled the truck up yesterday evening and it seems my rail pressure is up a little now, but still not where I think it should be. Anyway, I did 2 runs up to about 95. Now my truck is shifting from 2-3 at around 3500 RPM. I don't know what is going on, but it also seems like it is banging into 2nd harder than it has before. I do have some stuff in the back of my truck so it could be that stuff sliding around and banging into the bed/tailgate. I compared the logs from today, and from 30-90 is almost a full second faster than the same speeds on my quickest run at the track. I was running a different tune when it was shifting to 2nd at 3500. I'll keep you all informed on what is happening.

Share this post


Link to post
Share on other sites

Weird Josh. If you get a fitting for the bleeder valve, you can borrow my fuel pressure gauge. I don't have that fitting.

I have found different tuning makes big changes on shifting. I'll send you a tune that I built for high HP street driving. The replys I get from my customers are very positive shifts.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×