Heading to the track in the morning

[DoghouseDiesel]

Loaded up and ready to go.

Heading to Commerce, GA in the morning to play at Atlanta Dragway.

This will be the first chance we've had to put the truck on the track with the EFI Live tuning. Should be interesting.

Quite honestly, I have NO IDEA how it's going to do. If the street performance is an indication, it should do REALLY well.

And yes, the tow rig is running a "healthy" tow tune we did for it with EFI Live.

[DoghouseDiesel]

Well, I'm a little dissappointed to say the least.Had to take the EFI Live tune off and use my normal tune.Could not get the truck over 3000 RPM's. It would hit 3K, sit there a second, shift, pick up to 3k, delay, etc.Went from a low 11 sec truck to 13's. EGT's werent even touching 1k.Checked all the tables and parameters and everything is set to 4200 RPM's, so I'm a little stumped as to why its defueling.

[FUBAR]

I had a built truck doing this exact same thing and was able to fix it. I don't want to start to venture to say what I did to remedy it because I can't imagine it's anything different that what you've already done.

[FUBAR]

Although it was a manual though.

[Dmaxink]

Y'all will get it lined out man

[2007 5.9]

Have you rescaled map voltage??

Solved my defueling problems....

~Les

[DoghouseDiesel]

Yeah, rescaled all the sensors and maps so the MAP sensor is only seeing 30 psi and full fuel is at 21 psi and 2100 RPM's.

It was really weird....it would pull hard to 3000, sit there for a second, shift and repeat each gear.

As soon as it would shift, it would pull great, but it was like it was hitting a limiter at around 3K rpm's.

[2007 5.9]

Yeah, rescaled all the sensors and maps so the MAP sensor is only seeing 30 psi and full fuel is at 21 psi and 2100 RPM's.

It was really weird....it would pull hard to 3000, sit there for a second, shift and repeat each gear.

As soon as it would shift, it would pull great, but it was like it was hitting a limiter at around 3K rpm's.

I went the other way...my map voltage starts at 0-5v is 0-58psi in a diagonal line from corner to corner.

So my map sees 58psi and I get zero cut back.

I know exactly what your talking about...

~Les

[DoghouseDiesel]

Is it actually seeing that pressure in the logs though? Even with rescaling it should only be a 3 bar sensor, so 45 or so should be the limit...unless that's plus barometric pressure.

I gotta go back in to the logs this evening and see where it was defuleing and for what. We didn't get in until 3 am last night and didn't have any time between rounds to really analyze the issue. Just had to go back to a tune that I knew would get it down the track.

[2007 5.9]

Is it actually seeing that pressure in the logs though? Even with rescaling it should only be a 3 bar sensor, so 45 or so should be the limit...unless that's plus barometric pressure.

I gotta go back in to the logs this evening and see where it was defuleing and for what. We didn't get in until 3 am last night and didn't have any time between rounds to really analyze the issue. Just had to go back to a tune that I knew would get it down the track.

I set it to the above, but it sees 51.4psi...so I figure as long as the limiter is above max logged then it's good.

So far 3 trucks with over 50psi gauge have zero issues with defueling after tfe map rescale

~Les