spoke to soon

[Tally TransAm]

wasnt the o2 sensor

car is stumbling all over the place again this morning

i arleady got the intake off and everything looks normal, cant see why it wouldnt seal, but im just gonna torque it back down and see what happens

damn this is getting annoying

[Slow ET]

Mother bitch, check all seals/connections on the intake side and vacuum system. Look at the PVC valve. Arent there hoses in the back of the intake, maybe you got them flipped flopped with the wrong connections... i dunno :???:

[fatkid]

make sure htere is nothing absolutley nohting in the intake that could be blocking the air

[Tally TransAm]

pcv hoses are fine. and i know its not the valve because that only opens under a vacuum and this does stumbles during acceleration

vacuum hoses are fine

getting ready to torque the intake down right now and see what happens

[93zm6tally]

Hate to post the obvious but what about plugs and wires, maybe one got cut or is a little loose.

[Slow ET]

did the code come back?

[Tally TransAm]

intake is back on and the car is warming up

im gonna test drive it and see what happens, if the code comes back ill go get it scanned at autozone

(i can change an ls1 intake in under 75 minutes :D )

[97TA]

Ryan,
Try unplugging your mass air and driving around to see if that changes anything, it may have to be cleaned. Unplugging the maf sensor should put it into speed density mode(I know it does on LT1's, I've only heard it does on LS1's). I have to clean mine once a year or so from the k& n oil on my filter.

Give me a call when you want to atap it again. I have electrical contact cleaner for the maf too.

Jon

[slmdLS1]

ever find that wrench you lost?

[Tally TransAm]

Originally posted by 1500Sleeper
ever find that wrench you lost?

nope

and its not under the intake or in the motor :D:D

jon ill call you in a little bit

[Slow ET]

oh shit... RED is here http://members.cox.net/corvettejake/emoticons/aabanhimlikeabitch.gif

[Tally TransAm]

hehe

[shock6791]

If you want to scan the codes or anything, I can do it for you...just let me know 8)

[Tally TransAm]

cool man, what kind of scanner do you have

[shock6791]

It is an OBD II scanner that works with my palm pilot. I can also monitor a ton of sensors as well. 8)

[jlaw]

what brand is it? got a link? does it datalog?

lol

I REALLY need something, can't find a good solution

[Slow ET]

Ryan try this site LS1 Tuning (http://www.ls1tuning.com/forums/index.php)

[redmach1]

Stumbles upon acceleration........... Do LS1's have a vacuum fed pressure regulator? Does it level out after the stumble? It is strange that it was good for a little bit earlier, but bad again. I need alot more info to form an opinion. Let me know when you get it scanned. You might have picked up a piece of old gasket material in one of your spark plugs. You might have to change to a different heat range if you raised the compression high enough.

[fatkid]

hey shock6791 my check engine light is on could ur scanner work for my 94 talon

[Slow ET]

You will find more tomorrow when you log it. If your WOTs logs have normal B1S1 and B2S1 readings then there shouldnt be anything wrong with your sensor. Does it stumble cruising or punching it? Most importantly, you have to check to see if you get that 1133 code, if that goes away, then you can go from there.

[brandboZ28]

Originally posted by Nat.Asp.Talon
hey shock6791 my check engine light is on could ur scanner work for my 94 talon He said it was an OBDII scanner. Your car is OBD1 so I doubt it would work, might though:shrug:

[shock6791]

nah, it only works for OBD II. And it is somewhat of a datalogger as well. I am pretty sure that I can save data that it reads while driving. www.auterraweb.com

[93zm6tally]

I have an AKM Cable for OBD1 connectors and TTS Datamaster software. Don't think this would help.

[brandboZ28]

I still would like to hook mine up to that just to make sure everything is in order before I go and throw that cam in if thats ok with you.:D

[Tally TransAm]

ok ive got just over 40 miles on it since this morning when i redid the intake and tightened down the exhuast and everything and no ses light (yet, knock on wood)

but the thing is the car still runs like crap ONLY when the engine is cold, as soon as it gets to normal temp it runs fine. any guesses on what would cause this.

todd, what other info would you need to help diagnose this

ill have the atap log tomorrow night, i think im gonna check the condition of the tips of the plugs tomorrow, but i really really think its a fuel problem

[fatkid]

did u clean the injectors when u took the fuel rail off when putting the heads on

[Tally TransAm]

didnt have to take the fuel rail off

just left the rail adn injectors attached to the intake and took the whole assembly off

[Slow ET]

Does it stumble at WOT?

[Tally TransAm]

not when its warm, just hauls ass

when its cold and its stumbling it just doesnt go anywhere at any throttle

but warm and running good, hauls ass wide open

[brandboZ28]

You have all of your emission stuff deleted(EGR, AIR, ect), right? What else on your car only runs when your car is cold? I know on mine, the AIR only runs during the initial warm up. Does the open/close loops make a difference? Im sure you have already though of this kind of stuff.

Also, do you think you fuel pump is taking a crap on you?

[Slow ET]

Well at least that 1133 went away. We'll see what really going on after atap.

The motor runs on open loop when warming up, switches to closed loop for idle and cruise after warmup, then switches back to open at WOT. That 1133 code, i pretty 95% sure, only runs on the warmup open loop, it switches between sensors to check the number of occurences in a certain volt range, if it dosent see the desired number of occurences it sets that code. Ive read the warmup is around 2 minutes, then switches to closed. Is that about the right time for the car to run right and not stumble?

[Tally TransAm]

it takes about the time to get out of my driveway, down to tharpe, and turn right. thats right about where it starts running fine. so i would say about 2-3 minutes and about 170-190 coolant temp

i cant think to myself why it would run crappy in open loop and not closed loop though, especially if it runs ok wide open. i mean whens it stumbling it does go anywhere, the whole car chugs and it looses all power. but as soon as its running good and i go WOT it just flys

<-------- getting really frustrated

[redmach1]

I need sensor data like IAT, etc. There is a chance that the heads are too big, and the car is going to be cold natured until you get some heat in the heads to provide port velocity. You may have to have it tuned to get the cold start and open loop maps richend up. Watch the 02's on cold start and see if they go lean.

[Tally TransAm]

cool

i know im gonna have to get it tuned to get the most out of it, that isnt a problem at all. i actually plan on doing it in the next few weeks

[Tally TransAm]

this is what ive figured out

for the first about 2 minutes after starting it, warm or cold, the car will stumble and hesistate while driving. after that runs like a champ

and rediculously fast i might add

now im just slightly confused why it would only stumble and hesitate when i first start it

[Slow ET]

atap logs/parameters needed: try and get atap to run in DOS, it logs more data that way

for warmup idle: Ltrims B1 & B2(fast setting) and fuel cell (medium setting)
-- log this as soon as you start the car and let it sit for a few minutes(until closed loop is running ~2 mins)

start another log for cruise/idle: Ltrims B1 & B2 (fast setting), fuel cell (medium setting), TPS (slow setting)
-- log this after warmup above, spirited driving but not WOT till you get to I-10

start another log for WOT: O2 B1S1 and B2S1(fast setting), Ignition timing (fast setting), KR(medium setting), TPS(medium setting), RPM(slow setting)
-- log this a couple times, watch for tire spin, it throws the numbers off

[97MattGT]

the only time i've heard of conditions like that is on cars that have the EGR deleted.

dunno man.