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Thanks for every ones help!!! It was the crank sensor, new one installed and properly shimmed. MAF tune complete moving on to VE.

I found that current gear pid this morning and added it. All seems normal, always shows correct gear. I have a few questions about ECM 10040 and 10041. I thought these just turned on the CEL, how do...

Thanks for your input guys. I have added a gear pid, it seems to be showing the correct gear at all times, also the P/N rev limit is set well over 5000 rpm. It will not shift at WOT, it just won't...

I did replace the P/N switch a while back, as it was giving codes. I will recheck the tune and make sure it is still set up right. That makes the most sense as it feels like a rev limiter @ 4000 even...

Dang, I somehow didn't do those file attachments right. I hope this works

It seems no matter what I do, this motor won't go much over 4000 RPM
I have tried new fuel pumps, regulators, larger injectors, fuel filter, valve springs, removed timing, changed the MAF, endless...

I went with the 26lbs because I got them super cheap, $80 set, from a local on CL.

I originally thought the stockers were leaking because of pressure bleed off and changing the reg didn't help....

Thanks guys, what you are saying is how i understood it as well, I just got confused when i saw the factory tune.

You guys are awesome, thanks for the help, I will tune as you suggested.

99 Vortec 7.4L with 0411 conversion
I have swapped to 26lb LS1 injectors

The regulator is vacuum referenced on this engine.
The factory tune for the 7.4L shows adjusting for vacuum in the offset...

My O2's appear to be the case grounded type( flat connector) that shouldn't need that ground reference. I tried adding pin 63 to 26 and 29 anyway since it was easy enough to try. Unfotunatley still...

Now that you mention it, the O2's do seem to fluctuate a lot between 420 and 480. I'm getting no codes but perhaps a new set of O2's wouldn't hurt. This thing was running really lean in the beginning...

The O2's are working, voltages are pretty close together. You can see them in any of the logs in my first post. It's interesting if you look at the 'command closed loop ' logs, you'll see that when I...

No build thread. I put the Vortec into a 94 1 ton that had a TBI 454 with 200k on it. It's primary job is hauling my 10,000 lb RV around. I figured if i was upgrading to a Vortec I should upgrade it...

The 24x conversion was pretty easy, I just used the basic kit from EFI Connection and bought a full set of truck LS coils and brackets from the local Pick and Pull for about $50. Since I was doing...

I think it kept the LS firing order because I am using 24X and LS coil packs? I of coarse had to swap the pin outs for the coils. I made a total newb mistake and put PSI on my VE histogram instead of...

I need some help with a VERY lean SD problem

99 7.4L 0411 conversion, very, very mild cam, CAI, no cats or rear O2's, No A.I.R or EGR, stock engine otherwise. ECM and base tune from a well...