1999 Chevy S10 5.3 swap won't shift out of first

[mweath10]

I have a 1999 Chevy S10 that I just recently "finished" swapping in a LM7 5.3 out of a 2002 Silverado. Some back ground on the S10, it was originally a 4l60E truck and I installed a 5.3 with the 4l60e from the donor silverado. The PCM also came from the silverado and was flashed from my understanding, and what I can tell on HPtuners, to a S10 OS. This is my first time tuning, but the truck for the most part runs good from what I can tell. However, when I took the truck out for the first test drive I noticed that the speedometer wasn't working correctly and it wouldn't shift out of 1st gear when in drive. I did manage to manually shift it to 2nd, however. I did manage to take one log, but it probably doesn't have all of the relevant information which i'm hoping everyone can help with. I do realize that the truck still needs to be tuned, which i'm more than happy to hear opinions on but I want to figure out why it won't shift first and I have a feeling that the speedometer is connected.

I did go into the trans settings and it does appear at initial glance and didn't notice anything obviously wrong. Including to make sure that the VSS was updated with the tire size and gear ratio.

Please help!

[horsepowerguru427]

post the tune

Im guessing the IAT is disconnected, its reading -38.
You arent logging the necessary channels to see spark advance in the histogram, among other things. Anything you want in the histogram or graphs needs to be logged in channels for it to work.
Your fuel trims are way out of whack according to STFT on the log....post the tune...

[mweath10]

Sorry I thought I uploaded the tune. I just edited the original post. All I have done was made some idle changes to get it to run from what I've read and watched.

Yes, the IAT/MAF is disconnected at this point until I figure out how to run my intake tubing.

[horsepowerguru427]

Yes, the IAT/MAF is disconnected at this point until I figure out how to run my intake tubing.

Gotta have IAT for speed density to work. On some of the truck intakes I've drilled and tapped into the intake manifold after the TB and installed a new IAT after i made a breakout harness from the MAF. Fun fact, any IAT from a GM 3800series II is the same ohm range and is a direct plug in. Get the plastic one, not the brass, brass holds heat and gets pretty hot. You can ditch the MAF if you want, but youve gotta have the IAT..Ill look at the tune...

[mweath10]

I quickly realized I wasn't going to get far without having the MAF in when I started reading into everything. I also realized what it truly means to fit 5lbs of crap in a 1lb bag.

[bk2life]

I also realized what it truly means to fit 5lbs of crap in a 1lb bag.

Ive had a couple S10s with V8s in them.
Plenty of room for all sorts of activities..

have you checked the V8 swap section on s10forum.com? lots of pics, how tos, and all the info needed there as well

CAI 1.jpg

[mweath10]

Of course. That's where I figured out how to do everything haha. It was honestly a pretty easy process and I didn't have any real hiccups up until this one. The biggest struggle though is understanding how the PCM was flashed to S10 OS since it was done by CPW when I ordered there harness. I realized after all the reading how limited options I have doing that however tuning wise it seems like. I just haven't been able to figure out though if that's why the transmission wouldn't shift because I don't feel its a mechanical issue since everything otherwise seems to work fine.

[bk2life]

I don't feel its a mechanical issue since everything otherwise seems to work fine.

understood..
but as far as a tune goes, you have things not hooked up, so the ecu will try to protect itself and not run right.
trying to drive and or tune without everything working correctly is asking for more issues.
Are you going to run a maf or no?
Do you know how to set up the channels to log everything needed?
ASk questions and we can help, but we cant read your mind either

[mweath10]

understood..
but as far as a tune goes, you have things not hooked up, so the ecu will try to protect itself and not run right.
trying to drive and or tune without everything working correctly is asking for more issues.
Are you going to run a maf or no?
Do you know how to set up the channels to log everything needed?
ASk questions and we can help, but we cant read your mind either

This is the first question I have so far but I don't have any other's because I haven't made it far enough to run into any obvious issues. Based on feedback it sounds like I need to run a MAF so that I have better tunability and adjustments but at this point I don't have the setup to make the intake. I just figured out how to add channels but only after I took that initial log trying to drive down the road. If you have any suggestions on what's best to specifically log, especially in these situations, i'm all ears.

[horsepowerguru427]

Vehicle speed
RPM
MAP
MAF (if using)
IAT
ECT
Fuel trims (if using trims)
O2 voltage (if using)
Spark advance
Knock retard
Dynamic airflow
Cylinder Airmass
AFR commanded or EQ commanded
Fuel system status
Injector pulse width

Heres some basics. obviously you can add or remove them as needed. If youre looking for something specific, like knock retard, then substitute more knock channels in place of other things you dont need at the moment. And like i said in my other post, you dont have to run the MAF, you can breakout the IAT and just use it.

[bk2life]

run a MAF .

its not ideal but you can stick the maf right to the throttle body to get you going.
Is your engine stock, no performance cam?
if yes stock, then run a maf. I put mine way down low on the intake tube so you cant see it when you pop the hood.
I know you dont have tubing yet to make an intake, so get some duct tape and tape it to the throttle body.
This will at least help to get you going and start understanding on how the tuner and scanner work

[mweath10]

Good info from both of you thanks! I installed a TSP cam kit in the 5.3 and have new holley manifolds and full holley 3 inch exhaust all the way back. Otherwise, everything else is completely stock. Did you see anything obvious in the tune I posted that would cause the trans issues?

[horsepowerguru427]

its not ideal but you can stick the maf right to the throttle body to get you going.
I know you dont have tubing yet to make an intake, so get some duct tape and tape it to the throttle body.

Terrible recomendation, but i agree for the time being LMAO...If it works it aint dumb? lol
FYI you can order silicone tubes online in various diameters. Aslong as youre under a 4" diameter theyre not that expensive. 4"=102mm

[mweath10]

So does anyone see anything obvious in the tune that would cause it to not shift?

[bk2life]

So does anyone see anything obvious in the tune that would cause it to not shift?

You are missing the recommendation here.
Stick the maf onto the throttle body so everything is hooked up and all your sensors are working correclty.
Turn on the scanner and start recording, start the engine, and go do a quick drive around the block.
Post up that scan/datalog file.
Then we can see the scan and compare it with your tune.
It is not a magical 'hey that is your issue' thing going on here. There probably is several things and hence why the 'suite' is such a great tool because we can use all the information to see what is going on.

It's like trying to diagnose a heart attack without an xray. You know there is an issue, but without all the information, its purely guessing at what the issue might be.

[horsepowerguru427]

So does anyone see anything obvious in the tune that would cause it to not shift?

I agree with bk2life completely. I did look through your tune and nothing obvious jumped out at me. Put a MAF on and get a log.