etcts-v

Finally got the V to the dyno on friday, first pull was 418hp & 382tq, Second Pull after a few adjustments was 423hp & 380tq.

The major mods are in my signature, overall I am thrilled with the results. They came in right about where I expected them to.


So here's my Tune question, when I first took the car in it wouldn't idle at all, barley got it into the shop. With a few keystrokes on his laptop my tuner got it to idle great and not smell so bad! (apparently it was running really rich from the new injectors). Tune went great, was able to drive the car all the way home (180 mile journey) with no issues.

Then yesterday as I was exiting a freeway the car threw a code and immediately went into reduced power mode. I pulled over and let the car sit for a while and was able to start it right back up again and drive away. The code was a P1516 (Throttle Actuator Control Module Throttle Actuator Position Performance), I believe it was a result of a vacuum tube that connects to the TB falling off the passenger side valve cover.

The problem is now the car doesn't idle again, it wants to die as soon I start it. Could a reduced power mode or that code screw with the tune in anyway??

Here are Dyno Sheets:

FuzzyLog1c

iTrader: (4)

I think you need to clear your codes.

etcts-v

Code was cleared right after it happened.

punishmentcycle

iTrader: (6)

i had two ls2 tb's go bad on me..same code. one was the original and the second was a ported one..only way i fixed it was buying a brand new untouched gm tb. no issues since.

etcts-v

Good info, I was kind of thinking this may be the case. I think I'll just work on getting a LS2 throttle body and FAST 90 intake.

STAGEUP

Look for vacuum leaks and re-seat the tb connector. Then pull the ecm fuse for 2 min

etcts-v

Sweet thanks for the info, I'll try this tonight.

The tune can't be lost by pulling the fuse or by the car going into reduced power mode correct? My understanding is once it's flashed you would have to replace it with new mapping to lose it.

vmapper

iTrader: (8)

Tune can not be lost. Trims can be reset however. (Fuel and Idle trims)

Could you not carry the rpm to 6600? Your cutting off at 6300ish.

NeverSatisfied02

iTrader: (12)

Nice numbers!! And like others said, try pulling that fuse or disconnecting the battery for a bit and see what happens.

etcts-v

Thanks fellas!!


Not sure about the rpm, I've never tried to get there myself and the guy tuning was running the car during the pulls.



Just got an e-mail back from the tuner, he told me to try an idle re-learn tonight, we'll give that a shot!

etcts-v

Here is Video from Last Pull:

http://www.youtube.com/watch?v=QBkSB...ature=youtu.be

CancerJCC

iTrader: (4)

I had to get another LS2 TB myself. My CNC ported one was also throwing REP mode and it got worse as time went on.

G/L OP. REP is a bitch.

itsslow98

iTrader: (18)

Numbers arent bad, youll prolly see 440 with a FAST.

etcts-v

FAST is in the nearer future than I expected, my Throttle body is putting me into reduced power mode every time I open the car up... Damn MOD Hell...

punishmentcycle

iTrader: (6)

porting the electronic tb's is not a good idea...it doesnt take much to mess up the tiny actuator

etcts-v

Yeah never again!! I guess you have to learn the hard way sometimes..

jrane

iTrader: (10)

I had a ported TB and intake on my old setup and was throwing reduced power. I believe I had the same code as yours and borrowed 2 TB's from buddies, and didn't fix the issue. Ended up being my gas pedal went bad it was like $80 or $90. So try and borrow a TB before you buy a new TB.

Also man that graph sure is choppy who did your tune because there's still power left on the table?

This was my old setup in my ls2 before the ls3 with ported ls2 intake and TB, afr225, and pat g cam.

FuzzyLog1c

iTrader: (4)

That's why you need to go to someone who knows what they're doing (or leave it alone). There are only a couple of guys in the country that have the training and experience to do it right. Shame that the Affordable Speed guy retired. The same goes for intake manifold porting.

punishmentcycle

iTrader: (6)

i had a janzer performance ported ls2 tb..lasted about a month before it **** the bed. before that was a stocker..both went bad. the problem i see with ported TB's is they for the most part are used tb's. no one offers new tb's that have been ported.

when i bought my new one i could feel the difference just pushing on the butterfly valve with my finger. my bad ones had hardly ant resistance..the new one took force to open it..i have not had a problem since and it will stay as it is.my car is finally problem free

punishmentcycle

iTrader: (6)

outside of wornout tires >;-)