car dies when coming to an idle from acceleration. ls3 with chopacobra

[moesmopar]

2011 camaro ss 6.2 automatic just did a cam swap. car is dying when coming to an idle after putting chopacobra in the car. it idles ok for now i will work on that later but not sure exactly what im looking at when it comes to the car dying when coming down to an idle when at about 3k rpm. my crank also sucks so any help appreciated there would be nice i cant seem to get the ratio perfect. thanks

tsp 1 7/8 long tube headers high flow cats, chopacobra cam, ls7 springs, btr pushrods, vvt delete dod delete, straight piped, ported throttle body, cai

log of 3 pulls almost dying coming to idle
camaro died when stepping on it.hpl

current tuned up file after cam swap
#8 grinch idle good fails on step.hpt

base tune i got the car with supposedly a 93 tune
camaro base tune.hpt

[moesmopar]

please somebody help me id like to have my car at least derivable after this weekend

[LS ROB]

Add these channels to your scanner: MAP, DYNAMIC AIRFLOW, VOLUMETRIC EFFICIENCY AIRFLOW, INJECTOR DUTY %, INJECTOR PULSE WIDTH B1 & B2, AND CYLINDER AIRMASS. This should get some useful data for you. You have a Camshaft Position sensor DTC (P0340). May want to look into that.

You can try this as a test to see if it helps. I made some big changes to the VVE and MAF. VVE-MAF test ss.hpt

[moesmopar]

@ls rob it is still dying at idle when i step on it with that tune. it seems to idle better with the stft not at 14% anymore i appreciate that, now that ive added the channels and taken the log what would i attack next, it looks like its got too much gas when i hit the pedal and is removing 20% with the stft.

camaro new tune still dying coming down.hpl

[LS ROB]

@ls rob it is still dying at idle when i step on it with that tune. it seems to idle better with the stft not at 14% anymore i appreciate that, now that ive added the channels and taken the log what would i attack next, it looks like its got too much gas when i hit the pedal and is removing 20% with the stft.

camaro new tune still dying coming down.hpl

See if this helps. VVE-MAF test ss. braf.hpt

[moesmopar]

i will have to try later when im off work. but is there something i have to change in the settings so not throw a cam sensor code i have a brand new one that came with the cam kit, it used a 5 pin from the l99 down to 3 pin conversion for the ls3 front cover. is that whats possibly causing the code?

[LS ROB]

i will have to try later when im off work. but is there something i have to change in the settings so not throw a cam sensor code i have a brand new one that came with the cam kit, it used a 5 pin from the l99 down to 3 pin conversion for the ls3 front cover. is that whats possibly causing the code?

It's possible id say; however, I am not familiar with the 5 to 3 pin conversion. I would at least check the wiring connectors to make sure there are no loose wire connections there. You can create a new specific thread for that code. Once its fixed, you may still see a "Permanent" code that may take some drive cycles to clear itself.

[edcmat-l1]

That thing needs more BRAF and I'd put the throttle follower back to stock. Oh yeah the VVE need work too. And need to know the cam sensor code number to help diag.

[LS ROB]

That thing needs more BRAF and I'd put the throttle follower back to stock. Oh yeah the VVE need work too. And need to know the cam sensor code number to help diag.

Awesome. Thanks for chiming in Ed. His Camshaft code is a P0340 as stated in post #3. I took around 25% fuel out of this thing and i did add some BRAF but only at idle and lower. Honestly, I am not even sure if he's been able to drive it yet. Just working toward getting him on the right track.

[ns158sl]

Your over/under spark is ridiculous, im surprised it even idles through a garage shift lol. Go back to stock and reduce it again by 2/3 to get in the ballpark.

[edcmat-l1]

Your over/under spark is ridiculous, im surprised it even idles through a garage shift lol. Go back to stock and reduce it again by 2/3 to get in the ballpark.

Holy shit you ain't kidding. +/- 35 degrees @ 16 RPM error. WOW that's gotta shake the fenders off the car!!

[moesmopar]

Holy shit you ain't kidding. +/- 35 degrees @ 16 RPM error. WOW that's gotta shake the fenders off the car!!

i want that chop sound for a show. somebody told me thats what i do to get that at idle

[moesmopar]

See if this helps. VVE-MAF test ss. braf.hpt

tried this one it wont idle itself

not sure.hpl

[LS ROB]

tried this one it wont idle itself

not sure.hpl

See if this one will idle.

VVE-MAF test ss. braf-1.hpt

[moesmopar]

is this better? with this tune after running a while and resetting the fuel trims it seems to be happier, my issue now is that it seems to swing too low when coming back to an idle after revving it and almost dies or dies sometimes. but it stopped randomly dying at a solid idle so i appreciate that help.

#9 VVE-MAF test ss. braf idle fix.hpt

camaro idle log not dying randomly.hpl

[moesmopar]

havent tried this but the original one you posted i actually let run for a while and the car seemed to warm up to it and enjoy it a bit, going to try the one you just uploaded and incorporate that into the tune ive been working on based off your first one. i lowered the sensitivity of the knock sensors which got rid of my misfire and camshaft position sensor code. i want the car to go no lower than like 600 or 650 rmp when it swings down to an idle, how would i acheive this? what needs to be changed or what limiter raised?

#10 VVE-MAF test ss. braf idle test.hpt

way better idle still dying on the swing down.hpl

[LS ROB]

havent tried this but the original one you posted i actually let run for a while and the car seemed to warm up to it and enjoy it a bit, going to try the one you just uploaded and incorporate that into the tune ive been working on based off your first one. i lowered the sensitivity of the knock sensors which got rid of my misfire and camshaft position sensor code. i want the car to go no lower than like 600 or 650 rmp when it swings down to an idle, how would i acheive this? what needs to be changed or what limiter raised?

#10 VVE-MAF test ss. braf idle test.hpt

way better idle still dying on the swing down.hpl

Once BRAF and fueling is dialed in at idle, you will not have any issues. If this one is any better, try to get a longer log to let the trims settle a bit more. I Added just a bit of BRAF. VVE-MAF test ss. braf-1.1.hpt Are you currently able to drive the car? Normally, around 20 minutes of drive time would let the trims settle better.

[moesmopar]

all the logs so far have been in park. tonight i was about to drive the car on her maiden voyage around the lot, finally got all the bits and pieces in and shifted through all the trans modes PNDM, turned the car off, turned it back on and the damn thing was stuck in park and the key was stuck in the ignition and took an hour to get out. so back on the jacks it sits need to find a shifter assembly this one went bad. im trying to take it to a show this friday saturday and sunday and needs to be checked in wendesday. alwasys something.

i can force the shifter into neutral where it freely shifts, do you think it would be possible/bad to start it up in neutral and drive it like that until the new shifter comes?

the trims sit at 1-7% at idle with the current tune. i just wish i could understand the math or methodology of how to get the ratio correct. i have a wideband installed but it wont connect to my hptuners after a few times of using it it disappeared from the channels, but on the gauge the afr is always at 14-16 so i dont know what im doing wrong or how to work with these numbers to make them right.

[edcmat-l1]

i want that chop sound for a show. somebody told me thats what i do to get that at idle

So you intentionally jacked up the idle spark control tables for some stupid sound and now you're worried about why the car won't idle or return to idle properly. Got it!

It would seem logical to get the car to run properly before you intentionally jack it up for dumb reasons.

[edcmat-l1]

i lowered the sensitivity of the knock sensors which got rid of my misfire and camshaft position sensor code.

That makes no sense. None of those things are related.